EUPHORBIACE^. 



in 1738, distinguished it in his Fragmenta. Methodi Natiiralis, under 

 the name of Tricoccce, which it has kept till now. B. de Jussieu, 

 in 1759, in the garden of Trianon, allowed a class of Euphorhieœ, 



leaves. Flowers in axillary and terminal dicecious 

 fasciculate racemes. — 1 species from Jamaica: M. 

 glohosu Gkiseb. — Croton glohusus Sw. Prodr. 100. 

 — ItichiKs ffMosusW . Spec.iv . 56" . Belongs to the 

 series of the Sippommteœ (M. Arg. Prodi: 1255). 



14. PliijUubotrymn M. Arg. in Fliira (1864), 

 524; Prodr. 1231.— H. Bn. in Adansoiiia, xi. 

 137). United by Mueller to the Sippomaiiea- 

 £uphorbiaceœ, and described as diœcious, this 

 genus must have polygamous flowers, for we 

 have observed one having a young gynaaceum, 

 whose ovary was surmounted by a style with 

 three small stigmatiferous lobes. Its pauciovu- 

 late placentas, three in number, being parietal, 

 the genus should, perhaps, be separated from 

 the Euphoriiaceœ and joined to the Bixaccœ 

 or Saxifragaceœ. The apetalous male flowers 

 have five or six imbricated sepals, smrromided 

 by two or three analogous leaves, which have 

 been described as forming an involucre. The sta- 

 mens, of indefinite number, inserted on a flat or 

 slightly convex receptacle, are formed of a free 

 upright filament, surmounted by a coloured 

 connective whose edges bear the cells of the 

 anther, nearly triangular, with longitudinal in- 

 trorse dehiscence. A rudimentary gynœceum, 

 with two or three apiculate projections, may 

 exist in the male flower. P. spathulatum, the 

 only known species of the genus, is a tree from 

 western tropical Africa. Its alternate leaves 

 are in fact spathulate, petiolate, accompanied 

 by two stipules. The flowers are epiphyDous, 

 the axis ,of the axillary inflorescence, which 

 bears a pauciflorous C}-me, being raised with the 

 upper surface of the petiole and a portion of the 

 upper surface of the limb. 



15. PhijUoxyUn (H. Bn. in ^rf««so)nrt, ii. 54). 

 Male flowers with 3 imbricated sepals and 

 3 imbricated petals. Stamens 6, on 2 verticils.— 

 Shrub, from Slauritius, with cladodes of Xyh- 

 phijlla, aphyllous, with flowers in axillary, amen- 

 tiform spikes. Female flower. ... ? (Santa- 

 laceaj ? M. Arg. Prodr. 1256). 



16. Prœtoria (H. Bn. Exphorbiae. 470 ; — 

 Croton incanum Bl.). TJrticacese of the genus 

 Fipturus (M. Abg. Prodr. 1260). 



17. RegiitiliUu (H. Ex. in Adanso),ia, i. 187, 

 t. 7, fig. 7, 8). A shrub from Ceylon, with 

 alternate leaves and numerous male flowers in 

 axillary cymes. Calyx of 4 imbricated sepals. 

 Androceum column surrounded by a circular 

 disk, surmounted by a nidiment of the pistil, 

 and bearing below its two 4-merous verticils 

 of stamens. Female flowers. ... ? A genus 



VOL. V. 



probably allied to Seciiriiiega, Sri/jietes, etc. 



IS. SyjJiiria (Bl. £ij<''-- 600.— H. Bn. JEuphor- 

 biae. 339). A genus whose male flowers are un- 

 known to us. E. Casia {Aspidaiidra Hassk. 

 Cal. Sort. Bog. ed. nov. 47) will be, perhaps, an 

 Artocarpad (M. Arg. frodr. 1258). It seems 

 to be more probably a Bixaccœ, closely allied to 

 Osmelia and Limania of the series of Samydaceœ 

 (see Hist, de Plantes, iv. 307, 308). 



19. Stelechanteria (Dup.-Th. et H. B.v. in 

 Adansonia, iv. 147). Male flowers arranged in 

 small clusters on the stems. Trimerous imbri- 

 cated calyx. Stamens 4, 5, with introrse an- 

 thers, filaments inserted outside a large, urceo- 

 late, ihonophyllous disk, of the same height as 

 the calyx, contracted towards its superior open- 

 ing, and having unequally cut edges. Female 

 flowers ... ? Plant from Madagascar {Etiplior. 

 bincccc ? biovulate ?) 



20. Sccrctania (M. Arg. Prodr. 227). Male 

 flower with four sepals and four alternate petals, 

 four oppositipetalous stamens, with introrse an- 

 thers inserted i-ound a rudin^ent of gynfeceum. 

 Female flower. . . ? Tree from Guiana [S. 

 loranthacea), with alternate leaves, loaded with 

 short, ferruginous hairs, and male flowers in 

 compound racemes. Placed in Prodromus near 

 Savia, and perhaps allied to the polypetalous 

 Myninacem (H. Bn. in Adansonia, xi. 137). 



21. Tetragyne (MiQ. Fl. liid.-Bat. Suppl. i. 

 463). Female flower : calyx 5-phyUous. Ovary 

 with 4 cells, 1 ovulate (or with 2 cells 2 ovidate?) 

 Stigmata 4, linear. Ligneous plant from Sumatra 

 (T. «(■««!//.«<«), with alternate leaves and axile 

 flowers {Jporosa ? M. Arg. Prodr. 1254). 



22. Trisyiigyne (H. Bx. in Adansonia, xi. 136). 

 Monoecious apetalous flowers, male with mem- 

 branous, gamophyllous, tubular, obconical calyx, 

 and 4, 5 valvate teeth. Stamens 03 , with very 

 slender, central, free filaments, and basifixed 

 subapiculate, introrse, linear anthers. Female 

 flower (incompletely known) accompanied by 

 two smaU leaves (sepals?). Ovary with two 

 xmiovulate cells. Style thick, upright, bifid 

 and stigmatiferous at the apex. Trees from 

 New Caledonia, with simple, penninerved, alter- 

 nate leaves. Numerous flowers growing out of 

 an axillary or lateral shoot, the male disposed 

 in cymes, inserted in the axil of a scarious 

 scale ; the female arranged higher on a small, 

 rigid axis in 3-flowered glomerules, compressed 

 together, accompanied by glanduliferous bracts 

 and bractlets in the axils, and two compressd 

 glands, lateral to each glomemle. 



X 



