TENTANDRIAe DIGYNIi. 169 



tinct genus (viz. Vinceioxicum, of Persoon.) Asdepiast 

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

 under the sanction of popular compilers, constitutes 

 rather an order, than a particular genus. Several of 

 the genera, however, which were included in Asclepias, 

 Cv7io?ich7im, and Periploca, have been very judiciously 

 separated by Robert Brown, Esq. who properly con- 

 siders Asclepias as the type of a Natural Order, Ascle- 



PIADE^.f 



244. *ANANTHERIX4 



Calix and Corolla 5-parted. Lepanthium sim- 

 ple, 5-parte(l, segments compressed, fistulous 

 and impervious, incurved, unconnected with the 

 antheridium. Jrista or corniculum none. Sta- 

 mina as in Asclepias. Lateral winched margins 

 of the antheridium broad and membranaceous. 

 Lobes of the pollinium even, minute, stipe ter- 

 minal, very long. Follicles 2. Seeds comose. 



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

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

 tropis of R. Brown. 



E. viridis. Asclepias viridis? 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 inclies long, and about half an "inch broad.) Umbelis few- 

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

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

 5-parted, conniventr § Lepanthium sessile, 5-parted, 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 accord with genera 

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

 the late edition of the Hortiis Kewensis, vol. ii. 



^ From «6, ivithout,ii.r\d. oiv 6 e p i '^ , un cnni ,- the segments of the 

 lepanthium being, amongst otiier peculiarities, destitute of awns> 



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

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

 Dr. Baldwyn, from whom I obtained it, called it Asclepias con- 



