1834 REPORT OF THE CHIEF OF ENGINEERS. 



CRUCIFER^. 



Aralis Drummondii, Gray. 

 Cardanime cordifolia, Gray (1213, 151). 



Rio Chama, altitude 8,500 feet. 

 Draba alpina, L. 

 Draba streptocarpa, Gray (7, 27). 



Observed very abundantly, 7,000 to 12,000 feet, Summit District, &c. 

 Sisymbrium canescens, Nutt., var. 

 Erysimum asperum, DC. (208, 191), and var. pumilum (250). 



Weeniinucbe Pass, 10,500 feet, and other points near headwaters of Los Pinos and 

 Piedra. 

 Lepidium intermedium, Gray. 

 Lepidium alyssoides, Gray (1234, 1235). 



Abundantly observed on upper Rio Blanco, 8,000 feet, in August. 

 Lepidium montanum, Nutt. 



CAPPARIDACE^. 



Cleome integrifolia, Torr. & Gray. 



CARYOPHYLLACE.E. 

 Silene acaulis, L. 

 Stellaria longipes, Goldie. 

 Stellaria borealis, Bigel. 

 Arenaria Fendleri, Gray. 

 Arenaria Mflora, Wahl. 

 Arenaria lateriflora, L. 

 Arenaria saxosa, Gray (135, 136, 137, 138). 

 Observed abundant along Upper Rio Los Pinos, 10,000 to 10,600 feet, in July. 



PORTULACACE.E. 



Claytonia arctica, var. megarhiza, Gray (305). 



Needle Mountains, 11,500 to 12,800 feet. 

 Claytonia Chamissonis, Esch. 



HYPERICACE^E. 



Hypericum Scouleri, Hook. (362, 499). 



Observed along Rio Piedra and tributaries, 8,000 to 9,000 feet, July and August. 



MALVACEAE. 



Sidalcea malvseflora, Gray (1221, 266, 267). 



Observed along Rio Conejos, Navajo, &c, July and August, 7,800 to 9,000 feet. 

 Sidalcea Candida, Gray (186, 184). 



Headwaters Los Pinos Creek and Chama waters, in July, altitude 8,500 to 9,500 feet. 

 Malvastrum coccineum, Gray (75). 



LINACE^. 



Linum perenne, L., var. (L. Lewisii, Pursh) (1,263,290,480). 



Large areas covered with tbis plant observed along Rio Conejos, Upper Los Pinos 

 Creek, Rio Blanco, &c, July, 7,000 to 9,000 feet. 



GERANIACE^. 



Geranium Ricbardsonii, Fiscb. & Meyer (43, 126, 127, 237). 



Observed abundant along Rio Piedra and tributaries, July, about 800 feet. 

 Geranium Fremontii, Torr. (1246). 



Upper Rio Blanco, &c, 8,000 to 9,000 feet. 



SAPINDACE^E. 



Acer glabrum, Torr. 

 Nigundo aceroides, Mcench. 



ANACARDIACE.E. 

 Rhus glabra, L. 

 Rhus aromatica, var. trilobata, Gray (1283). 



