■v 



%k 



Hi 



PENTANDRIA DIGYNIA 



317 



filam 



appi 



Corolla refiexa. FuUi- fil 



ed to tlie angles of 



cuH lieves. 



1. LONGIFOLIA. 



A. caule decumbente 

 foliis alternis, linearibus 

 Umbellis lateralibus, erec 



: corona brevissiina. 



ted 



nts. Corolla rellec 

 Follicles smooth. 



tis 



Stem decumbent -, leaves 

 alternate, linear ; umbels 



ect : crown ve- 



7 



Asclcpias longifolia, Mich. 1. p. 116. Pursh, 1. p. 183. 

 A. incarnata, Walt. p. lOG. 



Perennial. Stem 18 — 24 inches high, decumbent and erect, pu- 

 bescent. Leaves alternate, somewhat crowded, Ihvear lanceolate, ses* 

 silc, pubescent particularly along the margins and midrib. 4- -6 inches 

 lonjr. 3 — 4 lines wide. Umbels near tlie summit generally verticillate. 



'05 



2—4 



besceiit, with a small leaf at the base of each peduncle. Calyx \ovf 

 small, 5 parted, erect. Corolla 3 or 4 times as long as the calyx, 5 

 parted, reflected, cinereous, tipped with purple. Leaves of tlie crown 

 closely embracing the angles or the corpuscle around its base, purple. 



R 



Til 



StamenSy styles^ Btlgma B.nd fruity as in 'l-e Asclepias, 

 clepias viridiflora of Pursh nnpears to beloni^ io tins s 



genus 



It is perhaps doubtful whether the absence of the horn-like appen- 

 dages constitutes a sufficient character to erJahlish fhw o-pmis T 



sufficient character to establish this genus. 



I 



should certainly have been better satisfied with it Itad it separated the 

 species of Asclepias with alternate, from those with opposite leaves. 

 Grows in wel pine barrens. 



May — July 



ASCLEPIAS. 



Massfc poUinis 10, Iseves, 

 pendulse. Corona stami- 



Pollen masses \ 0, smooth, 

 pendulous. Stamineal. 



7iea simplex, 5-plijlla;fo- J crown simple, 5 leaved j 

 liolis cucullatisj e fun do leaves cowled, bearing 

 exserentibus processum j from the bottom an a- 

 aversum, corniformem. j verted, horn shaped pro- 

 Corolla reflexa. Follicii- { cess. Corolla reflected, 

 li laeves. Brown. 



* Foliis opjwsitis sen 

 veriiclllatis. 



4. 



Variegata. 



Follicles smooth. 



* leaves opposite or 

 j veiticillate. 



A. foliis ovali-lanceolatis, I Leaves oval lanceolate, 



petiolatis, undulatis, sub- petiolute, undulate, soni9* 



^ 



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