326 LXXVI. ASCLEPIADE.^. 



Corolla rotate. Corona of 5 very prominent segments. 



Corona-segraents expanded into horizontally spreading laminae 



or disks. (Leaves fleshy) 12. Hoya. 



Corona-segments erect, membranous, peltately attached to the 



back of the anthers. (Leaves membranous) 13. Thozetia. 



Corolla-tube elongated ; lobes counivent at the tips. Corona mem- 

 branous, cup-shaped, with 5, 10, or 15 lobes. (Leaves cordate.) 14. Ceropegia. 



The introduced plants belonging to the genera marked above with the asterisk*, are the 

 following : — 



Arai(ja aliens, G. Don ; Dene, in DC. Prod. viii. 534 {FJtysianthis alhenSy Mart. Nov. 

 Gen. et Sp. t. 32, Bot. Mag. t. 3201, Bot. Keg. 1. 1759). A twiner, with ovate or laaceo- 

 kte leaves, truncate or cordate at the base, white underneath as well as the youug shoots. 

 Flowers large for the Order. Calyx-segments broad, leafy. Corolla with a broad tube and 

 a campanulate 5-lobed limb. Corona of 5 fleshy segments attached to the corolla-tube at 

 the base, the upper portion hood-shaped or convex with revolate margins. Pollen-masses 

 pendulous.— A native of S. Brazil, said to have spread from f^ardens into the neighbourhood 

 of Moreton Bay. 



GomjyJiocarpus friiiicosus, Br. ; Dene, in DC. Prod. viii. 55? ; Bot. Mag. t. 162S. A 

 tall erect plant more or less woody at the base, the young parts hoary-pubescent. Leaves 

 linear or linear-lanceolate, several inches long. Plowers white, in pedunculate umbels. Co- 

 Corona attached to the gynostcgium, of 5 laterally compressed broad erect 

 long as the anthers, truncate at the top. Fulllclcs inilated, membranous, 

 covered with long soft prickles.— A native of Africa, introduced with the early colonists, and 



long smce established near Port Jackson and other parts of N. S. Wales, B. Brown aud 



others. ■*■ 



Asclepias curassavlca, Linn. ; Dene, in DC. Prod. viii. 566 ; Bot. Reg. t. 81. An erect 

 perennial of 2 or 3 ft., usually glabrous. Leaves lanceolate, ratlier long. Umbels peduucu- 

 late, many-ilowered. CoroUa rotate, orange-red with a yellow gyuostegium. Corona 

 attached to the gynostcgium, of 5 ovate erect hood-shaped segments, each with an inner 

 curved horn longer than the outer segment. Follicles glabrous and smooth.— A native of 

 the \\est Indies, now spread in great abundance over most inhabited tropical regions, aud 

 already common m several parts of Queensland. 



TraBE 1. Periploce^.— Pollen-masses (1, 2 or 4 to each anther) gra- 

 nular, evidently consisting of 4 or more aijdomerated OTanules. Filaments 



rolla rotate. 

 segments as 



more or less free. 



1. GYMNANTHEEA, E. Br. 



Corolla with a cylindrical tube and spreading lobes, contorted in tlie bud, 

 the right-hand edges overlapping. Filaments distinct, inserted in the throat. 

 Lorona of 5 scales, inserted in the corolla-throat behind the filaments, 

 rolleii-masses 4 to each anther, granular, attached in fours (2 from each ad- 

 joining anther) to filiform appendages of the style.— Twiner with niaky 

 ■"""eduncle ''^^ ^"^aceous. Cymes loose, on interpetiolar or almost axilbry 



^ JiLwriU'""'^'^ !° ' 'i""^"^ 'P'^"^^' ™'J^°^J'= ^^ Australia. It is the only Australiau 

 jfsclepadea with granular pollen-masses. 



1. G. nitlda, R. Br. Prod. 46-1. ' A tall glabrous twiner, woody at the 

 base Leaves opposite, on rather long petioles? from ovate to oblong-eLipti- 

 cal, obtuse acute or mucronate, 2 to 3 or rarely 4 in. long, of a rather tm 

 consistence. Flowers of a greenish- white, the cymes shortly pedunculate 

 vith rather ebngated branches and numerous small bracts. Pedicels 3 to 4 

 lines long.. Calyx-segments ovate, f line long, .vith an irregular broken nng 



( 



