OF ARTS AND SCIENCES. 265 



fascicled: bracts mostly foliaceous : involucres capitate or fascicled, the 

 clusters more or less closely cj'mose-umbellate. — (§ Fasciculata, Benth., 

 Torr. & Gray.) 



70. E. ciNEREUM, Bentli. Leaves round to oblong, obtuse : pedun- 

 cles elongated, sparingly dichotomous, with iew rather open heads : 

 bracts short : flowers very villous. — Seacoast, S. California. 



71. E. PARViFOLiUM, Smith. Leaves broadly ovate to oblong, 

 acute: peduncles usually rather short, with few close heads: lower 

 bracts conspicuous : flowers glabrous. — Near the coast, S. California. 



72. E. FASCICULATUM, Benth. Leaves narrowly oblanceolate, acute, 

 usually revolute, often glabrate above, much fascicled : peduncles short 

 or elongated, bearing a short cymosely divided umbel, often much con- 

 tracted or capitate : bracts more or less conspicuous : involucres pubes- 

 cent or glabrate : flowers glabrous or often villous. — J^. ericcefolium, 

 Torr. & Gray, Rev. 170. S. California to Arizona and S. Utah. 

 Very variable. 



^- 4- -t- Involucres mostly solitary (terminal and alar), in a repeatedly di- or 

 trichotomous corj-mb-like cyme : leaves not fascicled : bracts small, very 

 rarely foliaceous below. — (§ Corymbosa, Benth., Torr. & Gray, excl. sp.) 



•w- Perennials, woody and diffusely much-branched, leafy below : leaves ovate- 

 to oblong-oblanceolate or linear : sepals obovate, the inner emarginate. 



73. E. MiCROTHECDM, Nutt. Low and rather slender, more or less 

 white-tomentose : leaves usually narrow, revolute, becoming glabrate 

 above: involucres usually small (f to 1| lines long), often pedun- 

 culate: flowers a half to a line long. — Var. effusuji, Torr. & Gray. 

 With very diffuse and repeatedly divided inflorescence. — Oregon and 

 eastern base of Sierra Nevada to Nebraska and New Mexico ; the 

 variety eastward. 



74. E. C0RYMB0SD>i, Benth. Stouter and more rigid, usually 

 densely tomentose : leaves broader and less revolute : umbel stifl\, 

 broadly cymose : involucres mostly sessile, 1 to 2 lines long : flowers 

 a line or two long. — Including E. microthecum, var. Fendlerianum, 

 Benth., Torr. & Gray. Of nearly the same range and hardly distinct. 



++ *+ Perennials, less woody and more shortly branched at base : leaves mostly 

 narrow : sepals nearly equal. 



75. E. Thompsons, "Watson in Am. Naturalist, vii. 302. Stout 

 and rio-id, erect, a foot high, yellowish, glabrous above the tomentose 

 base: leaves obovate-oblong, densely tomentose beneath, glabrate 

 above, on long petioles : involucres 2 lines long : flowei-s yellow, 1^ 

 lines long. — S. Utah. 



