164 MR. NUTTALL'S DESCRIPTIONS OF NEW 



E. *ANGUSTiFOLiuM. Suffruticose, with infertile branches towards the base ; leaves fasciculated and 

 verticillated, linear-acute, narrowed below, whitely tomentose beneath, greenish but pubescent above, 

 a verticel of about six leaves on the short stem; umbel simple, subtended by long, leafy bractes ; 

 divisions of the many-flowered involucrum reflected, pubescent ; perianth reflected, smooth. 



A low, somewhat shrubby species, about a foot high ; the stem tomentose ; leaves 

 an inch or more long, about a line wide ; rays of the umbel seven or eight, short. 

 Hab. Western slope of the Rocky Mountains. (Nuttall.) 



E. *EFFUSUM. Suffruticose ; leaves linear, oblong, obtuse, beneath whitely tomentose, above pubescent, 

 greenish; stem tomentose, two or three times trichotomous, divaricate; bractes ternate, lanceolate- 

 acute ; (flowers not seen.) 



Stem divided into many simple branches below ; flowering stem bearing bractes 

 only, divided compoundly and numerously, each division subtended by conspicuous, 

 trifid bractes. 



Hab. In the Rocky Mountains. (Nuttall.) 



E, *MiCRANTHUM. Leaves nearly all radical, arising from a thickish, woody caudex, linear-spathulate, 

 or narrowly oblong-lanceolate, narrowed below into longish petioles, whitely tomentose on both 

 surfaces ; scapes, bractes and involucres tomentose ; umbel decompound, pedicels of the second 

 divisions very short, with about three involucres in each; bractes acute or acuminate; involucres 

 campanulate, very small, the teeth obtuse ; flowers smooth, small and yellow, dioicous ? 



In aspect nearly allied to E. campanulatum, but with rather longer and narrower 

 leaves, and the involucres most of them sessile. 



Hab. In the Rocky Mountains of Oregon. ( Nuttall.) 



E. *ALBUM. Nearly stemless, with a woody caudex ; leaves very whitely tomentose, spathulate-obovate, 

 obtuse, usually longer than the petiole ; bractes minute, appressed ; umbel nearly simple, of few rays; 

 involucrum tomentose, angular, with shortish teeth ; flowers numerous, smooth. 



Very nearly allied to Fj. dicliotomum, but a smaller growing plant, with broader, 

 shorter, and whiter leaves; branches of the umbel two or three, short; each branch 

 bearing about two or three involucres, the uppermost pair of involucres sessile, so as 

 to form a larger head than what ever occurs in £. dichotomiim, and with the 

 involucres not singly disposed in a forked spike as in it. Flowers larger and smooth, 

 tlie filaments slightly hairy at the base, achenium with acute angles. 



Hab. Rocky Mountains of Oregon. (Nuttall.) 



E. *RosMARiNiFOLiui\r. Shrubby and much branched, smooth or somewhat pubescent ; leaves clustered, 

 nearl}^ linear, revolute on the margin, slightly tomentose beneath ; umbel pedunculate, compound, 

 bractes leaf}^, numerous; involucres usually smooth, with acute teeth : perianth mostly glabrous. 



Nearly allied to E. fasciculatum, but never with either oblong or elliptic leaves. 

 A stoutish low bush with brown brittle branches. Leaves smooth, three-fourths of 



