442 PHANEROGAMOUS PLANTS. 



2. Eriogonum thymoides, Benih. in DC. 



Hab. Upper Columbia and its tributaries, Washington Territory. — 

 Stem prostrate, tortuous, and woolly ; very much branched. Leaves 

 very small and crowded, hoary-tomentose, appearing somewhat terete 

 from revolute margins, which extend almost to the midrib. Flower- 

 ing branches elongated, leafless, or bearing a fascicle of leaves near 

 the middle. Head of flowers half an inch in diameter. Perianth 

 dark-red, densely clothed with white woolly hairs, which are reflexed 

 towards the base ; the 3 exterior divisions orbicular, cordate at the 

 base ; the inner ones broadly obovate, and a little smaller. Pedicels 

 articulated to the attenuated base of the flower. This species is cer- 

 tainly, as Bentham remarks, very near E. andimim, Nutt., and may 

 not be distinct. 



3. Eriogonum ovalifolium, Nutt. 



Hab. Valley of Klamath River, borders of Northern California ; 

 in dry prairies. — The flowers vary from nearly white and pale yellow 

 to dull purplish-red, and the species evidently includes E. purpureum, 

 Nutt., Benth. (Eucycla, Nutt.), as a mere variation. 



4. Eriogonum angustifolium, Nutt., Benth. in DC. 



Hab. On the Spipen and Yakima Rivers, between the Cascade 

 Mountains and the Upper Columbia ; a rare species. 



5. Eriogonum compositum, Dough in Benth. 



Hab. Eastern base of the Cascade Mountains to the Upper Colum 

 bia; also on the Kooskooskee. — Peduncles 12 to 18 inches long. 

 Perianth yellow, smooth and shining, attenuated at the base to a 

 short stalk, which is articulated to the pedicel. Achenium pubescent 

 near the summit. Embryo nearly straight. 



