APPENDIX G. BOTANY. 259 



APOCYNACE^E. 



Apocynum 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. 



Amsonia salicifolia, Pursh, Fl. 1, p. 184 i Decaisne, in DC. Prodr. 

 8, p. 385. Witchita Mountains; fr. July 16. This is perhaps only a 

 variety of A. angustifolia, Michx., and both may not be specifically dis- 

 tinct from A. taberncemontana. 



GENTIANACE^E. 



Sabbatia campestris, Nutt., in Tranj. Amer. Phil. Soc. (n. ser.) 5, 

 p. 167 ; Griseb., in DC. Prodr. 9, p. 50 ; Engelm. and Gr., PI. Lindh. 

 1, p. 15. On the Washita; fl. and fr. July 27. 



Erythr^ea Beyrichii, Torr. and Gr., Fl. 2, ined. E. trickantha /?. 

 angustifolia, Griseb. 1. c. With the preceding ; fl. and fr. July 26. 



Eustoma Russelianum, Don.; Griseb. in DC. Prodr. 8, p. 51. 

 Lisianthus glaucifolius, Nutt. 1. c. L. Musselianus, Hook. Bot. Mag., t. 

 3626. Washita River to the upper tributaries of the Red River ; July. 



CONVOLVULACEJE. 



Evolvulus pilosus, Nutt. Gen. 1, p. 174, (as a synonym) ; Trans. 

 Amer. Phil. Soc. (n. ser.) 5, p. 195. E. argenteus, Pursh, Fl. 1, p. 

 187 ; Choisy, in DC. Prodr. 9, p. 443 ; not of R. Br. Middle Fork of 

 Red River ; fl. May 22. Choisy doubtingly refers Brown's plant to 

 E. hirsutus, Lam., and therefore has adopted Pursh's name. 



Convolvulus lobatus, Engelm., and Gray, PI. Lindh. 1, p. 44 (in a 

 note.) C. hastatus, Nutt., in Trans. Amer. Phil. Soc. (n. ser.) 5, p. 

 194; not of Thunb. C. Nuttallii, Torr. in Emory's Rep., p. 149. 

 Middle Fork of Red River; May 22 — June 6. This species has much 

 the appearance of C. althoeoides, Boss. 



C. (Ipomosa) leptophyllus, Torr., in Frem. First Report, p. 94, and 

 in Emory's Report, p. 148, t. 11. With the preceding. 



C. (Ipomcea) shumardianus, (sp. nov. ;) caule gracili subpubescente ; 

 foliis ovato4anceolatis sursum angustatis basi acutis ; pedunculis petiolas 



