EUPHORBIACE^. 



153 



in 1738, clistingiiished it iu his Fragmenta MetliocU Naiuralis, 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 EupJwrhiece, 



leaves. Flowers in axillaiyandteiininal dioecious 

 fasciculate racemes. — 1 species from Jamaica: M. 

 globosa Griseb. — Crotoii gloJiosxs Sw. Prodr. 100. 

 — Ricinus r/Iobosiis'W. Spec. iv. 567. Belongs to the 

 series of the ffippomaiiea: (M. Akg. Pivcli: 1255). 

 U. Phijllobntri/um M. Arg. in Flora (1864), 

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

 137). United by Mueller to the mppomanea- 

 Euplwrbiaccfe, and descrihed as dioecious, this 

 genus must have polygamous flowers, for we 

 have observed one having a young gynseceum, 

 whose ovary was surmounted by a stj-le with 

 three smaU stigmatiferous lobes. Its pauciovu- 

 late placentas, three in number, being parietal, 

 the genus should, perhaps, be separated from 

 the Eiip/wriiaceiv and joined to the Bixacerc 

 or Saxifragacew. The apetalous male flowers 

 have five or six imbricated sepals, surrrounded 

 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 gynseceum, 

 with two or three apiculate projections, may 

 exist in the male flower. P. spathuUitum, 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 epiphyllous, 

 the axis .of the axUlarj' inflorescence, which 

 bears a pauciflorous oj-me, being raised with the 

 upper surface of the petiole and a portion of the 

 upper surface of the limb. 



15. PlujUoxylon (H. Bn. in vJf/rt)Mo«iff, ii. 54). 

 Male flowers with 3 imbricated sepals and 

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

 Shrub, from Mauritius, with cladodes of Xylu- 

 pliylla, aphyllous, with flowers in axillary, amen- 

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

 lacea) ? M. Arg. Prodr. 125G). 



16. Pretoria (H. Bx. Enphorbiac. 470 ; — 

 C'roton incanmn Bl.). tJrticacea) of the genus 

 Pipliirus (M. Arg. Prodr. 1260). 



17. Ue/inaldia (H. Bn. m Adaiisonia,i. 187, 

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

 alternate leaves and numerous male flowers in 

 axillar)- cymes. Calyx of 4 imbricated sepals. 

 Androccum column surroimded by a circular 

 disk, surmoimtod by a rudiment of the pistil, 

 and bearing below its two 4-morous verticils 

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



VOL. V. 



probably allied to Sccurinega, Dri/peies, etc. 



18. Si/paria (Bl. Bijdr. 600.— H. Bn. Muphar- 

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

 known to us. ij. Ccesia {Aspidandra Hassk. 

 Cut. Hort. Boy. ed. nov. 47) will be, perhaps, an 

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

 to be more probably a Bixacem, closely allied to 

 Osmdia and Lmmnia of the series of Saiiiydacere 

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



19. Htdt chanter la (Dup.-Th. et H. Bn. in 

 Adansonia, iv. 147). Male flowers arranged in 

 smaU clusters on the stems. Trimerous imbri- 

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

 thers, filaments inserted outside a large, urceo- 

 late, monophyllous disk, of the same height as 

 the calyx, contracted towards its superior open- 

 ing, and having unequally cut edges. Female 

 flowers . . . ? Plant from Madagascar {Euphor- 

 biacecc ? biovulate ':) 



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

 flower with four sepals and four alternate petals, 

 four oppositipetalous stamens, with introrse an- 

 thers inserted roimd a rudiment of gynajceum. 

 Female flower. . . f Tree from Guiana (.S'. 

 lorniithncea), with alternate leaves, loaded with 

 short, ferruginous hairs, and male flowers in 

 compoimd racemes. Placed in Prodromus near 

 Savia, and perhaps allied to the polypetalous 

 Myninacea: (H. Bn. in Adansonia, xi. 137). 



21. Tetrayyiie (Miq. Fl. Ind.-Bat. Suppl. i. 

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

 with 4 cells, 1 ovulate (or with 2 cells 2 ovulate f) 

 Stigmata 4, linear. Ligneous plant from Sumatra 

 (T. acuminata), -liiilL alternate leaves and axile 

 flowers [Jporosa ? M. Aug. Prodr. 1254). 



22. Trisyiiyyne (H. Bn. in Adansonia,xi. 136). 

 Moncecious apetalous flowers, male with mem- 

 branous, garaophyllous, tubular, obconical calj-x, 

 and 4, 6 valvate teeth. Stamens co , with very 

 slender, centi-al, free filaments, and basifixed 

 subapiculate, introrse, linear anthers. Female 

 flower (incompletely known) accompanied by 

 two small leaves (sepals?). Ovarj' with two 

 uniovulate cells. Style thick, upright, bifid 

 and stigmatiferous at the apex. Trees from 

 New Caledonia, with simple, penninorved, 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 glomcrules, compressed 

 together, accompanied by glanduliferous bracts 

 .and bractlcts in the axils, and two compressd 

 glands, lateral to each glomerulo. 



