258 APPENDIX G. BOTANY. 



The lower branches are covered at the base with tubers or galls, about 

 the size of cherry-stones, produced by the stings of insects. 



L. aphylla, DC. Prodr. 7, p. 198 ; Torr. and Gr., El. 2, p. 485. 

 0. Texana, Torr. and Gr. 1. c. North Fork of Red River ; June 16. The 

 numerous radical leaves are 3-4 inches long, runeinately pinnatifid. 

 Achenia angular, distinctly tapering upward. 



ASCLEPIADACE^E. 



Ascxepias 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 ; De- 

 caisne, 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 paniculata, Decaisne, 1. 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. Anantherix decumbens, Nutt. 1. c. 

 Cache Creek ; fi. May 17. The follicles oblong, not muricate. 



A. angustifolia, Decaisne, 1. c. Polyotus anc/ustifolius, Nutt. 1. c. 

 Branch of Cache Creek; fl. May 17. 



A. viridiflora, Ell. sk. 1, p. 31 7 ; Torr. Fl. N. York, 2, p. 124 ; De- 

 caisne, 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 speci- 

 mens collected by Captain 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. 



