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2015 Plant Giveaway Information Acer macrophyllum Magnolia salicifolia The Members’ Plant Giveaway is a special event for Arnold Arboretum members and supporters, and will be held in the landscape on Saturday, September 19, 2015 from 10:00am to noon. Members may select a quantity of free plants based on membership level: Individual ($35) Household ($50) Sustaining ($100) Sponsor ($200) Patron ($500) Benefactor ($1,000) Magnolia seiboldii Syringa vulgaris Schizophragma hydrangeoides Rhododendron calendulaceum 1 plant 2 plants 3 plants 4 plants 6 plants 8 plants As a current Arboretum member (membership valid through September 2015 and beyond), you will receive a plant coupon indicating the number of free plants available at your member level. Use your plant coupon to enter the Giveaway tent starting at 10:00am. Your free plant coupon can be redeemed for any plant in the Giveaway tent. Simply present your plant coupon to staff and bring home the plant(s) of your choice. This is a rain-or-shine event. You may send a proxy with your plant coupon if you cannot attend. If you misplace or lose your coupon, please visit the membership tent and a replacement coupon will be issued to you. For the safety and convenience of all our members, dogs will not be permitted in the Giveaway tent. Plant Drawing Diospyros virginiana Cornus sericea The Friends of the Arnold Arboretum MEMBERS' PLANT Saturday, September 19, 2015 10:00am to 12:00noon After choosing your plant(s) in the Giveaway tent, join our horticultural experts for a free drawing of additional plants from the Dana Greenhouses. If you wish to participate in the plant drawing, you may request a drawing ticket when you enter the Giveaway tent; the drawing time will be announced during the event. Staff will describe these special plants and randomly draw winners from submitted entries. You must be present at the drawing to claim a prize. Magnolia kobus (1199-77-E) 2015 Plant Giveaway (Kobus magnolia) Zones 4-7 Plant Selections Seeds for these plants derived from a specimen collected in Hokkaido, Japan by Steven Spongberg and Richard Weaver during a 1977 expedition to Korea and Japan. An early bloomer, its white, 4-inch, faintly sweet-scented blossoms completely envelop the tree. Kobus magnolia may take a decade or more to begin flowering, but the spectacular display is well worth the wait. Until then, enjoy its dark green summer foliage, widespread and rounded habit, and silverygray bark. Kobus magnolia may attain 25 feet in height with up to a 35 foot spread, and grows well in full sun and adapts to most soil types. [45] Selections propagated from seed or cuttings of Arboretum plants feature the source plant's accession number in parentheses next to the scientific name. Numbers in brackets following the descriptions denote quantities available at press time. Magnolia salicifolia (86-98-A) (Anise magnolia) Zones 4-7 TREES Acer macrophyllum (305-2014) (Bigleaf maple) Zones 6-7 Considered the grandest of the North American maple species, bigleaf maple can attain a height of over 100 feet in its native Pacific Northwest. However, since it is marginally hardy in our region, you can anticipate a 20–40 foot tree. Seeds were wild-collected last autumn in Washington State by Plant Records Manager Kyle Port. As its name suggests, bigleaf maple exhibits the largest leaves among our native maples—they are five-lobed, 8–12 inches long and wide, and glossy-green in summer changing to burnt yellow-orange in fall. Bark is gray to deep brown and furrowed. Given adequate moisture, it will make a noteworthy specimen tree in a sheltered location or a Cape Cod yard. [45] Diospyros virginiana (250-2013) (Common persimmon) Zones 4-9 This tough native tree has been cultivated for its fruit and wood for centuries. Reaching 30–60 feet in height, persimmon will thrive in less than ideal conditions, including partial shade, drought, and low fertility soil. Although it can be trained as a single specimen, its natural habit allows it to colonize in stands. Seeds for this offering were collected in southern Illinois by Curator of Living Collections Michael Dosmann on expedition in 2013. We are told that the yellow-orange fruits, which are borne on female trees in late fall, provided some delicious sustenance for the weary collecting team. [20] Anise magnolia promises a truly head-turning show for front-yard landscapes. Its white, perfumed, 4-inch wide flowers open in early spring for a striking early-season display. Lustrous green leaves emerge after flowering, and blossoms give way to 3-inch-long pink fruits containing brilliant red seeds. When crushed, stems emit a nice lemony scent. Smooth, gray bark provides interest year round, and its slim, pyramidal habit is also very attractive. Anise magnolia may attain a height of 20–30 feet. The much-anticipated flowering of M. salificolia trees near the Hunnewell Building and in the Explorers Garden should not be missed, and in time will grace your own landscape as a reward for enduring our New England winters. [60] Magnolia sieboldii (404-97-C) (Oyama magnolia) Zones 6-8 Short on space but still desire a flowering tree? This relatively rare small tree can easily fit into an established garden. Nodding, white, saucer-shaped flowers with magenta stamens are fragrant and produced in abundance from May to June and occasionally afterward. Fruits are 2 inches in length and contain ruby red seeds. Oyama magnolia flowers at a young age and the bloom period may extend to six weeks. Dark green leaves with lighter undersides are attractive in summer. Growing 10–15 feet in height, Oyama magnolia is stunning in a shaded shrub border. Provide partial shade and moist, well-drained soil. [45] Nyssa sylvatica var. biflora (257-2013) (Swamp tupelo) Zones 4-9 The genus name Nyssa is a derivation of Nysa, the mythological water nymph, and the species epithet sylvatica means “of the PlantGiveaway_Brochure_FINAL.indd 1 Directions and Parking For directions to the Arnold Arboretum, visit our website at arboretum.harvard.edu and follow the 2015 Plant Giveaway link. Please bring your event ticket/plant coupon or your membership card to gain entry. You may arrive at the Arboretum on foot, via MBTA, or by car. Members driving to the event may park along the perimeter and walk to the Giveaway tent, or drive into the Arboretum via the Bussey Street Gate and park on the inner roads of the Arboretum beginning at 9:30am; staff will direct you to parking and the event location. Cars parked inside the Arboretum exit via the Centre Street Gate, which will close at 1:00pm. For the safety of all our visitors, please drive cautiously, and do not exceed the 5 mph speed limit on Arboretum roads. Membership Info and Special Promotion To join or renew your Arboretum membership, or to find out more about the 2015 Plant Giveaway, please call the membership office at 617.384.5766 or email [email protected]. On the day of the event, you may also renew or upgrade your membership at the membership tent. Upgrade your membership to qualify for an additional plant(s); purchase a gift membership at any level at the event and receive a coupon for an additional free plant for yourself in the Plant Giveaway. Plant Information Arboretum horticulture staff and expert volunteers will be available to answer questions related to planting and caring for woody plants. Look for them circulating as you wait in line, as well as inside the Giveaway tent. See this listing of plants with links to plant images and find basic planting and care information for temperate woody plants at arboretum.harvard.edu. woods.” Hence, the swamp tupelo is appropriately named, as it often grows along stream banks throughout the eastern half of the US. However, it is adapted to both wet and dry sites, and grows well in full sun and partial shade. Swamp tupelo’s leathery leaves are dark green, turning a spectacular array of colors in fall—fluorescent yellow, orange, scarlet, and purple. This tree will reach 40–50 feet in height, somewhat smaller than the species. Requires consistently moist soil. [20] Styrax japonicus (Japanese snowbell) Zones 5-8 Native to China, Japan, and Korea, Japanese snowbell is prized for its drooping clusters of fragrant white flowers that appear in May to June. Flowers are five-petaled, waxy, and bell-shaped, and are followed by tan, oval drupes that typically drop in late fall. Upright foliage shows off flowers and fruits, and is a lustrous medium-deep green in summer. Bark is smooth and grayish brown, and mature specimens may exhibit fissures revealing orange inner bark for winter interest. This graceful 20–30 foot tree works well as a specimen or in a border planting, sited to allow walking beneath the crown to view the dangling flowers. Visit several flourishing accessions in our Centre Street beds, near the hickory collection. Grow it in full sun to moderate shade in moist, but well-drained, acidic soil. [95] Taxus canadensis (574-2008, 576-2008) (Canadian yew) Zones 2-6 This yew is native to the forests and mountains of New England. Cuttings to produce these plants were taken from specimens in northern New York, collected by Arboretum staff on the 2008 Adirondack Expedition. Canadian yew bears lustrous, dark green summer foliage that may develop a purplish brown cast in winter. Forms a low thicket, 3–6 feet tall by 6–8 feet wide, with a prostrate, spreading habit. Ideal for use as a groundcover in a shaded location and perfect for low maintenance landscapes, as it is extremely hardy and has no serious problems with disease or pests (except deer). Grow in moist, well-drained, sandy soil with some shade. [70] SHRUBS Aesculus parviflora f. serotina (12514-A) (Late bottlebrush buckeye) Zones 5-9 Outstanding summer flowers, good fall color, and shade tolerant—what more could a gardener Continued want in a shrub? This form of bottlebrush 8/13/2015 1:22:36 PM 8/13/2015 1:22:37 PM buckeye features showy, cylindrical, bottlebrush-like panicles, composed of four-petaled white flowers. Bloom time is early July to August, and light brown capsules ripen in September to October as its dark green leaves transform to a bright yellow. This spreading, multi-stemmed shrub can reach 8–15 feet in height, and performs well as an understory plant or sited at the edge of a woodland as it is in our Aesculus collection. Grown from seed collected from the Arboretum’s type specimen of A. parviflora f. serotina, collected in Alabama in 1919. [40] Calycanthus chinensis (607-94-C) (Chinese sweetshrub) Zones 6-8 Not as common as our native sweetshrub (Calycanthus floridus) but just as sweet, Chinese sweetshrub is a rare and exceptional shrub for use as a specimen or in a mixed border. It is indigenous to Zhejiang Province in China, and outstanding examples thrive in the Leventritt Shrub and Vine Garden and at the intersection of Oak and Beech Paths. Chinese sweetshrub features 2–3 inch diameter, nodding flowers with thick, white, waxy outer tepals and smaller pale yellow to white inner tepals with wine stains. Bloom period starts in mid to late spring and lasts for nearly a month. The large, shiny leaves are dark green in summer, changing to yellow in fall. Upright and rounded in habit, it will reach 6–8 feet in height with a 4–6 foot spread. Plant in full sun to partial shade in average garden soil, and relish Chinese sweetshrub’s delightful blossoms. [70] Cornus sericea ‘Flaviramea’ (Yellowtwig dogwood) Zones 3-8 This four-season shrub has it all and can withstand the test of time—a 1928 accession near Faxon Pond is still in excellent condition after 87 years! Flat-topped cymes of creamy white, fragrant flowers are borne in late May to June, and often appear sporadically throughout the summer. Small white drupes follow in early autumn and attract birds. Foliage is medium to dark green, transforming to beautiful shades of reddish-purple in fall. The finale is its stunning yellow stems, which look incredible against a snowy backdrop. Yellowtwig dogwood grows 6–8 feet tall and wide, with a spreading, stoloniferous habit. Great in mass or in a shrub border, this North American native typically grows in swampy areas, so plant it where it will receive adequate moisture, in full sun to partial shade. [30] Decodon verticillatus var. laevigatus (582-MASS) (Waterwillow) Zones 3-9 Curious about those bright splashes of pink along the edge of Faxon Pond in late summer? Ponder no longer—these vibrant flowers belong to waterwillow, a native aquatic sub-shrub. Waterwillow is named for its willow-shaped, elliptical to lanceolate leaves, which are up to 6-inches long and are held opposite or in whorls of three. Summer foliage is lustrous green, transitioning to scarlet in autumn. Waterwillow blooms in late summer to early fall when few other plants are flowering, and bloom time extends 1–2 months! One-inch diameter flowers are a shocking magenta-pink, each lasting one or two days. Waterwillow can grow 2–8 feet tall with an arching habit, and should be utilized as a bog plant or grown near a pond border. [25] Elsholtzia stauntonii (928-81-A) (Mint shrub) Zones 5-8 If your green thumb compels you to seek something out of the ordinary, mint shrub will certainly strike a chord. Seeds for these plants were collected from our original accession in the Explorers Garden, which was collected in China in 1905 by John G. Jack, Arboretum dendrologist, educator, and explorer. The plant features eye-catching, 4–8 inch long, upright panicles of magenta-pink flowers from September into October. Slender, 2–6 inch long green leaves emit a strong mint fragrance when crushed. Mint shrub is semiwoody and can attain 3–5 feet in height and width. Because it flowers on new growth, the plant can be pruned back in spring without impacting fall flowering. Performs best in full sun with well-drained soil. [125] Exochorda giraldii var. wilsonii (11626-C) (Wilson pearlbush) Zones 5-7 Wilson pearlbush, growing atop Bussey Hill at the Arboretum, presents a spectacular sight in early spring. Buds on racemes resemble pearls, and open to 2-inch wide, 5-petaled white blossoms that envelop this large shrub in April to May. Star-shaped capsules ripen in October, change to a deep brown, and persist. New, young shoots are tinged pink—as are petioles and mature leaf veins—and foliage retains its green color throughout the summer. This multistemmed shrub grows to 20 feet in height and width and can add interest to a border planting. Seeds for this offering came from the original 1908 accession collected by Arboretum plant explorer Ernest H. Wilson in Hubei, China. [20] Hypericum prolificum (338-2014) (Shrubby St. Johnswort) Zones 4-8 Help us evaluate a new accession of shrubby St. Johnswort, wild-collected in Saline County, Arkansas, by Curator of Living Collections Michael Dosmann during the Arboretum’s fall 2014 Ozarks Expedition. This petite shrub is the perfect selection for a small site with less-than-ideal soil conditions, as it grows only 1–4 feet in height and width and performs well in dry, rocky soil. In June through August, its small buttercup-yellow flowers look stunning against blue-green foliage. Showy capsules persist all winter, and make an excellent addition to dried floral arrangements. Grow in full to partial shade. [20] Ilex glabra ‘Peggy’s Cove’ (3-2002) (Cultivar of inkberry) Zones 5-9 This outstanding inkberry cultivar originated from cuttings collected by Plant Propagator Jack Alexander from a seaside barren in Peggy’s Cove, Nova Scotia in 1988. In 2006, it was registered as a new plant introduction with the Holly Society of America and is now showcased in the Leventritt Shrub and Vine Garden. Lustrous, dark, evergreen foliage adorns this dwarf shrub, and small white flowers in late spring give way to glossy, purplish-red drupes that change to black and persist through the following spring (needs a male inkberry nearby for pollination). Foliage is well-retained during harsh winters, even in exposed locations. ‘Peggy’s Cove’ displays an attractive mounded habit and may attain 2–4 feet in height with a similar spread. Performs best in moist, acidic soils and full sun, but can tolerate some shade. Ideally utilized in mass or as a hedge. [185] Ilex rugosa (967-87*B female, 184-89*B male) (Prostrate holly) Zones 3-6 If you are looking for a small shrub that will not overtake your border, then search no longer! This evergreen, prostrate shrub reaches a height of no more than 8–12 inches and spreads to 2–3 feet. Its 2-inch, rugose, dark green leaves will provide year-round interest, and female plants growing in proximity to a male plant will yield red, ¼-inch fruits, which ripen in September. Prostrate holly was one of the parents used in developing the Meserve holly hybrids, ‘Blue Prince’ and ‘Blue Princess’. Several I. rugosa accessions can be viewed it the Leventritt Shrub and Vine Garden and Centre Street beds. Very hardy, but not exceptionally heat tolerant. [50 female, 75 male] Lindera benzoin (248-2013) (Common spicebush) Zones 4-9 Add a touch of the Midwest to your garden. Plants were grown from wild-collected seed obtained in 2013 from a stand in St. Joseph County, Indiana by Curator of Living Collections Michael Dosmann. Growing 6–12 feet in height with a similar spread, this rounded, suckering, loose shrub performs best in full sun to partial shade. Foliage is deep green, turning to a soft yellow later in the season. Tiny green-yellow flowers in early spring give way to abundant scarlet fruit (on female plants) in fall. Not only is common spicebush a feast for the eyes, but collection notes highlight the aromatic, lemony scent that emanates from the bark when scratched. This pleasant fragrance is also emitted from crushed foliage. Spicebush is an excellent choice for borders or naturalizing and grows well in moist soil. [20] Rhododendron calendulaceum (Flame azalea) Zones 5-7 These captivating shrubs in our Azalea Border and along Oak Path have stopped countless Arboretum visitors in their tracks. Flame azalea flowers in May to June, varying in color from seedling to seedling—lemon yellow to salmon, brilliant orange, and scarlet. Foliage in summer is lush and medium-green, changing to pale yellow in autumn. Flame azalea is the showiest of all native azaleas and is indigenous to the mountains of Pennsylvania south to Georgia. It has a loose, informal habit and grows 5–8 feet in height and width. Excellent for a woodland setting, shrub border, or mass planting. Grow in moist, acidic soil with dappled shade and relish its eye-catching blooms in late spring. [40] Salix alba ssp. vitellina ‘Britzensis’ (26-2013-A) (Coral embers willow) Zones 4-8 Add outstanding winter interest to your landscape with coral embers willow. This cultivar of white willow features vibrant reddish-coral young stems, which are striking against snow and evergreens. Foliage is also attractive—narrow, graygreen leaves with white undersides change to a light yellow in autumn. Coral embers willow is quite vigorous, growing 6–8 feet in one season, so pollarding or hard pruning before new growth appears in early spring is recommended for best stem color and maintaining it as a multi-stemmed shrub. The species is native to central and southern Europe to western Siberia and central Asia, and ‘Britzensis’ was propagated by seed in the city of Britz, Germany. Grows best in medium to moist, well-drained soil, with full sun or partial shade. [40] Sarcoccoa hookeriana var. digyna (647-83-A) PlantGiveaway_Brochure_FINAL.indd 2 Syringa ‘Betsy Ross’ (Cultivar of lilac) Zones 4-8 ‘Betsy Ross’ was the first product of the lilac breeding program at the US National Arboretum, started in the 1970s by researcher Dr. Donald Egolf. This hybrid was evaluated in numerous states, from Alabama to Minnesota, and across the country to Washington, before it was released in 2000. It is the progeny of an unidentified lilac from Rochester, NY’s Highland Park and a Syringa oblata (early lilac) collected in China. ‘Betsy Ross’ is noted for its striking floral display, consisting of large panicles of delightfully fragrant white flowers in early spring; high tolerance to powdery mildew; and ability to withstand heat and humidity. It may attain a height of 10 feet with a 13-foot spread, and displays a desirably rounded, dense habit. Try it in full sun and welldrained soil to see how it will perform in a New England garden. [45] Syringa vulgaris ‘President Lincoln’ (Cultivar of common lilac) Zones 3-7 Similar to its namesake, ‘President Lincoln’ common lilac is legendary. This cultivar has grown in popularity as one of the bluest-flowered lilacs since America’s first lilac breeder, John Dunbar, introduced it in 1916. ‘President Lincoln’ derives from the open-pollinated French hybrids and Lemoine cultivars at Highland Park in Rochester, NY. Single, bluelavender, delightfully fragrant inflorescences are produced early in the season, along with dark green, lustrous foliage. It may attain a height of 10 feet with an 8-foot spread. The perfect addition to a mixed border planting, this lilac is a vigorous grower in full sun and well-drained soil. [90] Vaccinium corymbosum (Highbush blueberry) Zones 3-7 Native to eastern North America, highbush blueberry is a handsome shrub that offers a treat for taste buds. Summer leaves are slightly blue-green, changing to brilliant yellows and oranges, bright scarlet, and wine-red combinations in fall. Dainty, pinkish white flowers in corymbs bloom in May, which give way to firm, bluish black berries. Berries are tasty, and birds are also fond of the fruit, so pick your fill before they do. However, just a few plants can provide a great deal of fruit. With an upright, rounded form, growing 6–12 feet high and 8–12 wide, highbush blueberry fits well in a shrub border or informal garden. View it at the Arboretum in the Azalea Border and the Leventritt Shrub and Vine Garden. Plant it in acidic, moisture-retentive, humus-rich soil in full sun to partial shade. [65] Viburnum dentatum (Arrowwood viburnum) Zones 3-8 Durable yet beautifully ornamental, arrowwood viburnum captures the best of both worlds. Our viburnum collection includes eight accessions of this species or its varieties. Arrowwood viburnum features shiny green foliage in summer, changing to yellow, scarlet, or reddish-purple in autumn. In May to June, 2–4 inch flat-topped cymes of creamy white flowers are borne and endure for nearly two weeks. Oval ¼-inch blue to bluish black drupes follow in September to October and attract birds. This multi-stemmed, rounded shrub with spreading branches can colonize, making it an excellent choice as a hedge or shrub border. Arrowwood viburnum can attain 6–10 feet in height and spread when grown in well-drained soil with full sun to partial shade. Although this species is not resistant to viburnum leaf beetle, you can help manage the pest by encouraging beneficial insect populations (like lady beetles) and removing egg-infested twigs. [25] VINES Clematis virginiana (268-2013) (Virgin’s bower) Zones 4-9 Native from Nova Scotia to Georgia to Kansas, this striking deciduous vine may attain 12–20 feet in length. Creamy white panicles of flowers are produced in abundance throughout the summer and silver, feathery seed heads persist in fall. Plant Virgin’s bower in well-drained soil and full sun to light shade. Seeds were wild-collected in 2013 in Illinois from a plant growing at a woodland edge, so this vine can tolerate some shade. Try placing near a fence or trellis for aesthetic effect. Before snowfall, be sure to save the attractive seed heads for dried floral arrangements. [70] (Japanese hydrangea vine) Zones 5-9 Having difficulty establishing turf or small shrubs beneath a large pine? This rare evergreen shrub with year-round interest may offer a great solution. Summer foliage is glossy dark green, which changes to shades of maroon as winter approaches. Separate apetalous male and female flowers, ivory in color and emitting a sweet fragrance (hence its common name), are borne beneath the foliage in spring. These give rise to small black drupes in summer that persist into winter. Sweetbox attains a height of 18–24 inches with a wider spread due to stoloniferous growth, and performs best in shaded locations with acidic and highly organic soil. A specimen at the Dana Greenhouses thrives in partial shade, beneath a grove of mature Chamaecyparis obtusa (Hinoki cypress). Sweetbox is native to the Western Himalayas and Afghanistan. [90] Schizophragma hydrangeoides ‘Moonlight’ (Sweetbox) Zones 6-8 You likely have admired Japanese hydrangea vine in the Leventritt Shrub and Vine Garden—here is your opportunity to showcase this eye-catching, four season vine on a trellis or wall in your landscape. Climbing 20–30 feet, the vine’s bluish-green leaves display pale silvery markings reminiscent of its cultivar name. White, 8–10 inch, lace-cap-like flower clusters bloom for 6 to 8 weeks in summer. Foliage changes to yellow in autumn, and attractive reddish-brown stems provide winter interest. Grow in light shade and moistureretentive, but well-drained soil. [40]