APPENDIX D. — BOTANY. 389 



Peucedanum citernatum, (var. ? platycarpum.) — Fructibus 

 obovatis, alls membranaceis disci sesquilatioribus. — With the pre- 

 ceding. Except in the broadly-winged fruit, this plant does not 

 appear to differ essentially from P. hiternatum, Nutt. 



Thaspium montanum, Gray. — Fl. Fendl. p. 57 ? On a mountain 

 bordering the Salt Lake. Fl. May 25. One specimen has a per- 

 ennial root, crowned with several spreading scapiform stems, which 

 are (in the flowering state) from five to eight inches long. The 

 whole plant is very glabrous and somewhat glaucous. The leaves 

 are bi-tripinnatifidly cut, with oblong, acute, entire, or incised 

 lobes. The yellow flowers are in dense umbels, with numerous 

 rays. There is no involucre, and the involucels consist of 7-9 

 linear lanceolate leaflets. The carpels of the young fruit are 

 furnished with five broad, undulate wings. The vittae in the in- 

 tervals seem to be solitary, or sometimes double. 



Aster oblongifolius, Nutt. — Stansbury's Island, Salt Lake, 

 June 26. 



Erigeron concinnum, Torr. and Gray, Fl. 2, p. 174. — Valley 

 of Salt Lake, May 30. 



DiETERiA PULVERULENTA, Nutt. in Torr. and Gray, Fl. 1, p. 

 101. — Green River, Sept. 12. 



SoLiDAGO MissouRiENSis, Nutt. — ^With the preceding. 



LiNOSYRis SERRULATA, Torr. (nov. sp.) — Ramulis scabriusculis ; 

 foliis anguste linearibus trinervibus rigidiusculis acutis, margine 

 serulatis ; capitulis fastigiato-corymbosis subquadrifloris ; squamis 

 oblongo-lanceolatis glabris subquinquefariam, imbricatis laxiusculis, 

 exterioribus multo brevioribus, coroliis glabris. — Valley of the 

 Salt Lake. 



Grindelia squarrosa, Dunal. — Bear River, near the Hot and 

 Cold Springs. Fl. May 10. 



Stenotus c^spitosus, Nutt. in Torr. and Gray, Fl. 2, p. 238. — 

 Valley of the Salt Lake. 



Ambrosia coronopifolia, Torr. and Gray, Fl. 2, p. 291. — 

 Table land at the northern extremity of Salt Lake Valley, Sept. 19. 



MoNOTHRix, Torr. (nov. gen.) — Capitulum hemisphericum, radia- 

 tum. Involucrum subtriseriale ; squamis subsequalibus oblongo-line- 

 aribus. Receptaculum, nudum. Flores radii foeminei, uniseriales 



