6 Colo)'ado Plants. [zoe 



2. FiOm Mancos. Similar to No. i, but canescent with close 

 stellate pubescence; pedicels strictly deflexed with scattered 

 stellate hairs, pods sparingly hairy along the margins. This 

 was also collected in Navajo Canon, a branch of Mancos Caiion. 



3. From Mancos. Stems slender, several from the root, 

 canescent with close stellate pubescence; radical leaves from 

 spatulate-dentate to oblanceolate, entire; upper part of the stem 

 and pods smooth and glossy, pods on spreading pedicels, two 

 rows of winged seeds in each cell, flowers small. 



4. From Mancos. Similar to No. 2, except that the cauline 

 leaves are oblanceolate, sessile at the lower part of the stem, and 

 sagittate above only. 



5. From Southeastern Utah. This branches at the root and 

 also above, and is chiefly distinguished by the short spreading^ 

 pods not more than an inch in length. 



6. From Central City, Colo. This branches from near the base 

 with many slender stems, small lanceolate sessile leaves, with 

 scattered bristly hairs on the margins. 



Are;naria FENDI.ERI Gray. This is found at Grand 

 Junction with short leaves and straw-colored flowers. 



SiDAivCEA. This is described as having beakless carpels. 

 The two species found in Colorado, 6". Candida and S. vialvciflora^ 

 have carpels decidedly beaked, wrinkled, and veiny. 



Sph.-Eralcea rivularis Torr. This has been collected with 

 two well marked forms. The plant seen in* the Uncompahgre 

 Canon, near Ouray, was almost a bush three feet or more tall, with 

 many leafy stems from the root, lower leaves a foot long, 

 slightly lobed and crenate, hispid with stellate bristles, upper 

 stem-leaves with deeper lobes irregularly toothed; flowers 

 nearly two inches in diameter, white and few among the large, 

 broad leaves which thickly clothe the stem. 



At Steamboat Springs, in Routt County, Colo., Sphceralcea 

 rivularis is abundant on a mountain side not far from the town. 

 This variety branches into many flowering erect stems, leaves 

 not more than three inches long, deeply lobed into acuminate 

 divisions which are sharply dentate or laciniate, the large rose- 

 colored or white flowers are crowded along the almost naked 

 peduncles. 



