OF ARTS AND SCIENCES : JANUARY 26, 1870. 171 



of forms, several of them described as species ; but only the larger 

 forms with broad leaves, and some with much larger involucres (var.? 

 Fendlerianum, Benth.) and approaching the preceding species, stand in 

 the way of the present inevitable union. The 



Var. a. (E. nricrotheca, Nutt., Benth. in DC.) is a low form with 

 linear or linear-oblong nearly plane leaves and open corymbose cymes 

 on a rather long peduncle ; involucres a line to a line and a half long. 

 E. laxiflorum, Nutt. (the var. 0. ? laxiflorum, Benth.) is the same, with 

 involucres a trifle larger and fewer in the cyme. Forma alpina, pyg- 

 mcea. A very depauperate, short-stemmed, and comparatively long- 

 peduncled alpine form was gathered by Prof. Brewer in Sonora Pass, 

 Sierra Nevada, alt. 9,000 feet, in loose sand ; and somewhat similar 

 ones, only two inches high, on the Humboldt Mountains, Nevada, alt. 

 10,000 feet, by S. Watson. Geyer's 253, with white flowers, and a 

 broader-leaved form with yellow flowers, collected by S. Watson on 

 the Wasatch Mountains in Utah (both with short and low leafy 

 branches and long peduncles), connect this with the 



Var. 0. Fendlerianuji, Benth. Majus, latifoliura ; involucris 

 lin. 2 longis in cyma arapla laxa. — New Mexico, Fendler, no. 767. 

 Remarkable for the size of the parts, the leaves being an inch or an 

 inch and a half long, including a distinct petiole of four to sis lines, flat, 

 and four or five lines wide. Specimens from Nevada (Brewer, Torrey, 

 Bloomer, dec), some with narrower, others with almost oval leaves, 

 hardly an inch long, connect this with 



Var. y. coxfertifloruji. (E. confertiflorum, Benth.) Fruticu- 

 losum, foliosum ; foliis anguste oblongis ; cymis confertifloris saspius 

 contractis. — Utah to interior of Oregon, and northern part of Cali- 

 fornia. Flowers either white, deep rose-color, or sometimes apparently 

 yellow. Bentham's var. Stansburyi has the dense floribund cyme 

 of this, but the longer naked peduncle and narrow revolute leaves of 

 some of the succeeding forms. 



Var. S. leptophyllum. (E. Simpsoni, Benth. in DC. excl. /3. 

 E. effusum, var. leptophyllum, Torr. in Sitgreaves Rep. p. 168, excl. 

 tab. 10. E. effusum, var. foliosum in Pacif. R. R. 2, p. 129.) Folio- 

 sum ; foliis anguste linearibus margine valde revolutis glabratis ; cyma 

 brevi saspius conferta floribunda. — Utah and New Mexico, Gunnison, 

 Woodhouse, Simpson, Whipple, Newberry. Bentham's E. Simpsoni, 

 var. Jloccoso-lanata, is only E. annuum. Torre}' 's plate of E. effusum, 

 var. leptophyllum (Sitgreaves, t. 10), with long naked peduncle, short 



