B UP HO RBI A GE^. 



189 



VI. DICHAPETALUM SEEIES. 



Dichapetalum [Chailletia) toxicariwn. 



Dichapetalum'^ (figs. 221-225), long designated under tlie name 

 of Chailletia, and of which, a distinct family has been made, because 

 the flowers are often hermaphrodite, must be considered as the 

 ^highest in organisation of the Eu- 

 phorhiacece with biovulate oyary cells. 

 They are sometimes polygamous. In 

 those flowers which combine both 

 sexes a receptacle is seen (frequently 

 convex), bearing a double perianth, 

 an isostemonous androceum and a 

 superior gynseceum. The calyx is 

 formed of five unequal sepals, free 

 or united below, quinouncially im- 

 bricated, larger and more mem- 

 branous, as they are more iaterior in 

 prsefloration, and the corolla, of five 

 alternate petals, more or less deeply 

 divided above into two spoon- or 

 hood-shaped lobes, slightly imbri- 

 cated or induplicate in the bud. The 

 androceum is formed of five sta- 

 mens, alternate with the petals, and 

 with a like number of hypogynous 

 glands, free or united, usually bifid. 

 Each stamen is composed of an hypo- 

 gynous filament and an anther, the 

 two introrse cells of which, dehis- 

 cing longitudinally, are applied on the internal surface of a thick, 

 glandular, coloured connective. The gynseceum is composed of an 

 ovary with two or three cells, surmounted by a style divided 



Fis. 221. Floriferous branch. 



1 Dup.-Th. Nov. Gen. et Spec. 78 (1806).— 

 H. Bn. in Adamonia, xi. 102, t. 9, fig. 7-9. — 

 teueoaia Dup.-Th. cip. eit. 79. — SymphylUmthm 

 Vahi, in Naturist. Selsh. -vi. 86 (1810).— 

 Chailletia DC. in Ann. Mm. xvii. (1811), 153, 

 t. 1, fig. 1 ; Frodr. ii. 57.— Tubp. in Diet. Sc. 

 Nat. Atl. t. 247.— Endl. Q-m. n. 5758.— B. H. 

 Gtn. 341, n. 1.— H. Bn. in Fayer Fam. Nat. 



307. — Moaeurra EoxB. Fk Ind. ii. 69.— H. Bn. 

 M. Gen. Fuphorbiac. 587. — M. Arg. in DC. 

 Prodr. XV. p. ii. 227. — f Quilesia Blanco, Fl. de 

 Filipp. 176. — Mutates Boland. MSS (ex. R. Bn. 

 Congo, 442). — Walhenbergia E. Br. in Wall. Cat. 

 n. 4332 (nee Bl. nee Sohuad. nee Schum.). — 

 Flappertia Beichb. Consp. u. 3824 (ex Endl.). 



