APPENDIX G. BOTANY. 277 



L. aphylla, DC. Prodr. 7, p. 198 ; Torr. and Gr., Fl. 2, p. 485. /S Texana, 

 Torr. and Gr. 1. c. North Fork of Red River ; June 16. The numerous radi- 

 cal leaves are 3-4 inches long, runcinately pinnatifid. Achenia angular, dis- 

 tinctly tapering upward. 



ASCLEPIADACE^. 



Ascelpias tuberosa, Linn.; Michx Fl. 1, p. 117 ; Sweet. Brit. Fl. Gard., 

 (ser. 2,) t, 24 ; Decaisne, in DC. Prodr. 8, p. 567. Torr. Fl. N. York, 2, p. 

 123. Upper tributaries of Red River ; May — June, The leaves vary from 

 ovate and amplexicaul to narrowly linear. 



A. speciosa, Torr. in Ann. Lye. 2, p. 218, and in Fremont's First Rep., p. 

 95. A. Douglasii, Hook. Fl. Bor.— Am. 2, p. 53, t. 142 ; Decaisne, 1. c. 

 Witchita Mountains to the upper tributaries of the Red River ; fl. June — 

 July ; flowers larger than in any other North American species of Asclepias. 



Acerates panictjlata, Decaisne, L c. p. 521 ; Asclepias viridis, Walt,, Fl. 

 Carol, p. 107? Anantherix paniculatus, Nutt., in Trans. Amer. Phil. Soc. 

 (n. ser.) 5, p. 202, Cache Creek and Middle Fork of Red River, fl. May 16, 

 fr. June. 



A. decumbens, Decaisne, 1. c. JJnantherix decumbens, Nutt. 1. c. Cache 

 Creek -, fl. May 17. The follicles oblong, not muricate. 



A. angustifolia, Decaisne, 1, c Polyotus angustifolius, Nutt, 1. c. Branch 

 of Cache Creek ; fl. May 17, 



A. viridiflora, Ell. sk. 1, p. 317 ; Torr. Fl. N. York, 2, p. 124 ; Decaisne, 

 1. c. Asclepias viridiflora, Pursh. Fl. 1, p. 181 ; Hook. Fl. Bor. Am. 2, p. 53, t. 

 143. North Fork of Red River ; fl. June 4. The specimens collected by Cap- 

 tain Marcy belong to the broad-leaved forms of the plant. 



Enslenia albida-, Nutt. Gen. 1, p. 164, and in Trans. Amer. Phil. Soc. 

 (n. ser.) 5, p. 203 ; Decaisne, in DC, Prodr, 8, p, 518. Main Fork of Red 

 River ; not in flower. 



APOCYNACEJE. 



Apoctvum cannabinum, Linn. ; Hook. Fl. Bor. — Amer. 2, p. 51, t. 139 ; 

 Decaisne, in DC. Prodr. 8, p. 439 ; Torr. Fl. New York, 2, p.—. Common on, 

 the upper tributaries of Red River ; May— June. 



