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Note on some more tropical labyrinth-seeds W.A. There the seeds that, when are 1970). This cut in folding of to located in the in on, (Corner, 1966, in case possibilities. of the Firstly mostly flat, cotyledons testa tissue some cases by a development the or to either be may or the testa testa at first Palmae). there small Secondly the are probably two of folded and lobed, amount testa can of endosperm be located in — many that a discotyledons (Hernandia, Mangifera). However, it labyrinth-seeds will be rather arbitrary, as long as the precise ways of massive tinction among much in be located between portions may (Kingiodendron, Erycibe, Argyreia, Neokeithia). crevices in some sometimes surrounded — testa Palmae, Annonaceae, etc.), interfering with the cotyledons, tissue testa the case when the embryo has become larger, also interferes with the the Heel, possible that and later In (van structure It is interferes with the endosperm, cotyledons labyrinth a cotyledons (Burseraceae, Dipterocarpaceae), endosperm only (‘ruminated seeds’ interfere with the cotyledons. may show plane, any the Heel of testa tissue within the seed. In the latter presence tissue be due may van seems remain unknown. It is resembling is unfortunate that In addition it very end-stages (Corner, between labyrinth and structure probable that different ontogenies 1966; Heel, van 1971; Periasamy is known of hardly anything a yield possible correlation of germination, and its possible way may 1962). ecological signif- icance. Mangifera Dr. seeds, (Anacardiaceae) spp., drew Hou Ding my whereas the other concerned were Cambodja, and 14103, L., cult, M. M. in inocarpoides One dried seed of M. located in to three species of Mangifera which had labyrinth- Merr. & of the genus inocarpoides (Brass 8462) kidney-shaped seed had crevices a was almost up reaching of tissue, When a the plane. However, question cross-section was which under the microscope some places, the line between them, proved arose It could be concluded that this which, moreover, adhered plane. The epidermides can a proved to to the median two moreover, plane. cotyledons, consisted of two two could be compressed flat-celled cell 'Normal' one on labyrinth-seed presented itself consist of of for anatomical obser- the outside, which, into faint median line consist staining positively the whether it also made, to since available testa on seeds, which had no albumen, could easily be severed mass of Kostermans Bogor). numerous side of the median had normal seeds. The species Perry from Papua, M. camptosperma Pierre from gedebe Miq. from Sumatra, Borneo, and Java (fruit Hort. vations. The whole large was attention nearly thirty species as a each solid cotyledons. detected in the seed, walls. Moreover, in epidermides with a cuticle with Sudan IV. seed, like the normal together with a common ones, consisted of two cotyledons, cuticular membrane in the median be traced along the outside of the seed and along the crevices BLUMEA 110 filled with tissue. In testa tracheids and xylem portion of spiral lined with starch The cells tissue testa at with a this stage consists of Fig. Argyreia ridleyi (Prain) Dried seeds of one Prain become firmly appressed showed after the like toward at to the had been embryo the cross-section of the seed ledons the embryonic on forming with so was unfolded, parts two plates of testa bases of the cotyledons; there was upper plates and the It is case in tissue cotyledons were of were scarce evident that this seed is tomentosa. with could be found, large two many F.R.I. and flat 2634) cotyledons, were used emarginate Convolvulaceae. The flat cotyledons for in the seed the fact their form only embryo was undulating. were bent In the cap- figure testa that were fused. In the base of the located between the embryonic axis and the cordate at the level of insertion of the cotyledons. tissue in the median bent cap-shaped. was The was limited upwards remaining space by between the filled up with endosperm that had become jellified remains a very Then, plane of the seed, around which This plate embryo. of swollen cell walls (cf. simple labyrinth-seed. However, Erycibe griffithii turned because of the stronger lobing of the cotyledons Convolvulaceae, filled of the cotyledons. seed, 7 x. of the cotyledons the cap-shaped cotyledonary folds, except for Erycibe of polygonal cells epiderm made exactly above the point of insertion of the coty- they terminated median parts completely, the axis. another, large, plate of testa the halves of the the organs). (Convolvulaceae) The figure shows three black extensions of the seed a These canals abound in various mantle of a near cross-section like in base, phloem. surrounded by crushed were to each other by their adaxial surfaces. In side, and the lateral one and collection of this Malaysian plant (Kepong the top and cordate were each of which with bundles, the site of the reported crushed Ooststr., ex at soft parenchyma, partly disrupted and necrosed a for this study. They contained embryos at are Argyreia ridleyi, 1. 1971 vascular canal the outside on which liquid substance, I, epithelial cells canals resin in the middle of the crevices, many large a small, densely staining (in Anacardiaceae No. XLX, the ground tissue of the cotyledons consisted of large contrast filled with starch and of roundish cells were VOL. which would be interesting to out (van Heel, their lobed and folded cotyledons, study I Netolitzky, 1926). described another simple to be 1970). more complicated I expect gradations in that in the labyrinth-seeds morphogenetically. W. Rhopalocarpus A. spp. van R. lucidus laciniate. In fruits that In other carpus Rhopalocarpus too gradation a on Rhopalocarpaceae described and illustrated in Note some tropical labyrinth-seeds more 111 (Rhopalocarpaceae) In his revision of the Especially Heel: a , the two were spp. the plants from Madagascar, Capuron Rhopalocarpus were the laciniae yet mature, structure labyrinth in of cotyledons separate not family of several labyrinth-seeds was structure less strongly were and Dialyceras lobed and spp. the lobes surrounded by albumen. complicated. Evidently in Rhopalo- could be found. REFERENCES CAPURON, R. 1962. Rhopalocarpacees. Adansonia, HEEL,W. A. VAN, 1970. Some unusual 1 971. The NETOLITZKY, F. II: 2, PERIASAMY, ology 10: K. natural labyrinth-seed 1926. Anatomie 1 history der n.s., II. 1: 228—267. of Palms. tropical labyrinth-seeds. of Hernandia peltata Angiospermen — Proc. K. Ned. Akad. Wet. C. 73. 3: 298 —301. Meisn. in DC. Samen. In: K. Ibid. 74. Linsbauer, 1: Hb. 46 — 51. der Pflanzenanatomie —364. 1962. The ruminate A — 1966. The des E. J. H. Revision CORNER, endosperm. Development and Symposium' (C.S.I.R., New Delhi): 62—74. types of rumination, In 'Plant Embry-