PLANTS COLLECTED BY DK. GAMBEL. 163 



A very low shrub, crowded witli brown, short, twiggy branches; umbels very 

 compound ; the involucres all distinct, not crowded together ; every joint of the 

 umbel subtended by short appressed bractes. 



Hab. On the sides of hills in Oregon, east of Walla-Walla. (Nuttall.) 



E. *CAMPANULATUM. Leaves all radical, clustered upon a thickish caudex, linear-spathulate or narrowly 

 oblong, narrowed below into longish petioles, whitely tomentose on both surfaces; scapes smooth and 

 naked ; umbel about twice trichotomous, few-flowered ; bractes acute, a little tomentose on the 

 margins; involucrum campanulate, about 6 to 10-flowered, smooth, with obtuse teeth; perianth 

 yellow, smooth, 



A small species, with long, narrow, whitely tomentose leaves, clustered at the top 

 of a simple unbranched caudex, one and a half to two inches long, by about two to 

 three lines in width, and obtuse ; scapes six to eight inches, and as well as the 

 branches of the umbel, quite smooth and brownish ; rays usually three to four, 

 some simple and others subdivided ; involucres solitary ; pedicellate mostly with 

 bractes a little below them : flowers minute, dioicous? stamens nine. 



Hab. On the western declivity of the Rocky Mountains. (Nuttall.) 



E. *BREVicAULis. Branches very short, arising from a woody caudex, clustered, tomentose; leaves 

 linear-lanceolate, long and rather acute, attenuated into a very long petiole, whitely tomentose 

 beneath, less densely above : upper scapoid stem very smooth; the bractes acuminated, toraentosely 

 margined; umbel two or three times compounded, with very long rays; teeth of the campanulate 

 involucrum acute ; flowers smooth, yellow and very small. 



A much larger plant than the preceding, which it much resembles, with an evident 

 short stem; leaves three or four inches long, attenuated, with a very long petiole, 

 dilated at its embracing base two or three lines wide. 



Hab. On the upper plains of the Oregon. (Nuttall.) 



E. *GYR0PHYLLUM. With a woody caudex; lower leaves clustered towards the base of the stem, 

 oblong-lanceolate, acute, attenuated at the base, beneath tomentose and yellowish-white, above slightly 

 pubescent and green ; a verticel of leaves on the stem, about six, subsessile, oblong ; umbel simple,^ of 

 many short rays, with a leafy, spreading involucrum, tomentose within and without, many-flowered, 

 shallow and simple, with longish, reflected teeth ; perianth smooth, exserted. 



A remarkable species, bearing some distant resemblance to E. tomentosum, but the 

 plant and its leaves are much smaller. It is about a foot high ; leaves about two 

 inches long, and half an inch wide, with a little of the brownish hue to the tomentum 

 so remarkable in E. tomentosum. Several infertile small branchlets come out from 

 the stem, which is also tomentose ; rays of the umbel eight to ten ; flowers 

 ochroleucous, numerous, much exserted, oblanceolate ; achenium a little hairy on 

 the angles. 



Hab. Rocky Mountains of the Platte. (Nuttall.) 



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