PENTANDRIA. DIGINIA. 169 



tinct genns (viz. Vinceioxicim, of Persoon) ,/lscJepiaCi 

 as it formerly stood, and as it stdl in part remains, 

 under the sanction of popular compilers, constitute.-^ 

 rather an order, than a particular genus. Several of 

 the genera, however, which were included in A^clepia^^^ 

 Cynmichiun, and Periploca, have been very judiciously 

 separated bv Robert Brown, Esq. who properly con- 

 siders ^isclepias a» the type of a Natural Order, Ascle- 



PIADEiE.-j- 



244. *ANANTHERIX4 



Caliv and Corolla o-parted. Leyanthium sim- 

 ple, 5-parted, segments compressed, fistulous 

 and impervious, incurved, unconnected with the 

 antheridiinn. t.5?'isf« or cornirnjuni none. Sta- 

 mina as in Asclepias. Lateral \vin2;ed margins 

 of the anthcridlmn broad and membranaceous. 

 Lobes of the pollinium even, minute, stipe ter- 

 minal, very long. Follicles 2. Seeds comosc. 



Similar to Asclepias in habit. Stem erect, leaves oppo- 

 site; flowers umbellate. Nearly allied to the genus Cato- 

 trdpis of \i. Brown. 



jG. viridis. Jhclepias vindis? Walter. Flor. Car. p. 107. 



Descript. Root perennial. Stem simple, erect, (about 2 

 feet high.) Leaves oblong or oblong-obovate, mucronulate, 

 sessile, rather thick and minutely pubescent on either side, 

 (2 inches long, and about half an inch broad.) Umbells few- 

 flowered, lateral, nearly sessile; pedicells pubescent. Ca- 

 lix 5-parted, persistent, divisions oblong-ovate. Corolla 

 5-parted, connivent? § Lepanthium sessile, 5-pai-ted, some-. 



f I regret, that Mr. Brown's publications on this subject are 

 not to be seen, that I know of, in the United States, so that I 

 am obliged, rather than culpably omit any genera peculiar to 

 North America, to propose the 2 following, without being able 

 satisfactorily to ascertain how far they may accr^rd with genera 

 already published by Mr. R. lirovvn, except what appears in 

 the lute edition of the tlortus Kewensis, vol. ii. 



- ± From es, ■ivithout,2ind <>iv6spi ^, anuiu??,' the sc^^ments of the 

 lepanthium being, amongst other peculiarities, destitute of awns. 



§ Judging by the only specimen which I have of this plant, 

 the corolla seems never to expand! or very imperfcctlv, hence 

 Dr. Baldwyn, fiOm whom 1 obtained it, called it Asclepias cou- 

 7Ui'ens. 



