PLANTS FROM SOUTHEASTERN UTAH. 279 



oasis, and here a greater variety of plants was found than 

 in any other locality. Aquilegia micrantha was seen 

 under the shadow of moist rocks, Wyethia scabra, Cnicus 

 Rothrockii and Frasera Utahensis, flourished on the grassy 

 slopes, while near the water grew Salix longifolia and 

 cordata, which give the creek its name. At the large 

 spring where Willow Creek heads, a grove of shrubs 

 and trees forms a mass of green that can be seen for 

 miles, consisting of willow, cottonwood, oak and Rhamnus. 



The next morning, July 14, we rode down the steep 

 slopes of the canon to the junction with the San Juan 

 River, where the two gorges meet. The most unex- 

 pected plant found in this canon was Aster spinosus, a 

 single clump only, which grew to a height of about six 

 feet, and probably was more than a yard in diameter. The 

 willows and ash were occasionally seen, but no oaks or 

 conifers. In the deep gorge of the San Juan the veg- 

 etation was sparse along the river bank, the Ampehfisis, 

 before alluded to, being the most interesting plant. 



Wednesday morning we started on the return trip, 

 passing over the same trail and arriving at Mancos Sat- 

 urday morning, having collected about 475 specimens, 

 representing 162 species and varieties, of which 19 are 

 new and almost all are rare. It was a hard trip, about 

 300 miles altogether, through a desert country where 

 springs are few and far between and good feed for the 

 animals very scarce. The altitude is about 6,000 or 7,000 

 feet, and the whole region is to be considered as an out- 

 lying portion of the great Colorado plateau. 



The collection is in the herbarium of the California 

 Academy of Sciences, including all the types. Dupli- 

 cates, when of sufficient number, have been distributed 

 to the Gray Herbarium, National Herbarium, Herbarium 

 of the Missouri Botanical Garden, Herbarium of the 



