1836 REPORT OF THE CHIEF OF ENGINEERS. 



ONAGRACE.E. 

 EpiloMum tetragonum, L. 

 Epilobiuua angustifolium, L. (143). 

 Frequently observed, particularly in valley of Weeniinuche Creek, July, 8,000 to 

 9,000 feet. 

 CEnothera biennis, L. 

 CEnothera coronopifolia, Torr. & Gray. 

 CEnothera albicaulis, Nutt. 

 Gaura coccinea, Nutt. 



LOASACE^. 



Mentzelia multiflora, Nutt. 

 Mentzelia aurea, Nutt. 



CACTACE.E. 



Cereus gonacanthus, Engelm., &c. 

 Opuntia Missouriensis, DC. 

 Abundant in many forms, particularly along Lower Rio Los Pinos, &c. 



CORNACE.E. 



Cornus pubescens, Nutt. 



UMBELLIFER^. 



Cicuta maculata, L. (182). 

 Cymopterus alpinus, Gray. 

 Ligusticum scopularum, Gray (242). 



Along the Chama, July, 8,000 feet, and elsewhere, similar altitude. 

 Heracleum lanatum, Michx. 



CAPRIFOLIACE.E. 



Lonicera involucrata, Banks (503, 528). 



Abundant along upper road to Pagosa, near Rio Navajo, Blanco, &c, 7,500 feet. 

 Symphoricarpus occidentalis, R. Br. 



RUBIACE^E. 



Galium boreale, L. (1217, 1220, 550, 201, 232, 233, 483, 529, 281, 288, 418, 417, 439, 413, 426). 

 Very common; noted everywhere, Rio Navajo, Blanco, Los Pinos, &c, July and 

 August, 7,000 to 10,600 feet* 



Galium triflorum, Michx. 



VALERIANACE^E. 



Valeriana sylvatica, Richards (93, 98). 

 Valeriana edulis, Nutt. (224). 

 Upper Rio Los Pinos, Weeminuche Pass, &c, July and August, 7,000 to 10,000 feet. 



COMPOSITE. 



Liatris scariosa, Willd. (1222). 



Very numerous along Rio Navajo, &c, August, 8,800 feet. 

 Brickellia grandiflora, Nutt. 

 Aster adscendens, Lindl. 

 Aster lsevis, L. 

 Aster falcatus, L. 

 Aster glaucus, Torr. & Gray. 

 Aster Coloradensis, Gray (228,229,231). 



Along Rio Piedra and tributaries, Rio Los Pinos, &c, July, 8,000 to 10,000 feet. 

 Aster (MacJiceranthera) canescens, Pursh (1249, 1219). 



Rarely observed; none gathered save along Rio Navajo, August, 7,400 to 8,900 feet. 

 Erigeron composition, Pursh. 

 Erigeron grandiflorum, Hook., var. elatius, Gray. 

 Erigeron uniflorum, L. (226). 



Rio Los Pinos, July, 10,100 feet. 

 Erigeron macranthum, Nutt. (361). 



Rio Piedra, &c, July, 8,000 feet. 

 Erigeron divergens, Torr. & Gray. 

 Solidago Virga-aurea, L., var. 

 Solidago Missouriensis, Nutt. 

 Solidago Canadensis, L. (1245). 



Frequently observed along Upper Navajo, August, 7,000 to 8,000 feet. 

 Bigelovia graveolens, Gray. 

 Bigelovia Douglasii, Gray. 





