ERIOGONUM POLYGONACE 4 571 
glabrate above: peduncles stout 6-12 inches high with a whorl of leaves 
near the middle umbel 1-11-rayed, sometimes simple, usually with some 
or all of the rays once or rarely twice divided: flowers yellow or whitish, 
eae: about 3 lines long. On dry plains, eastern Washington to Nevada 
and Utah. 
-E. compositum Benth. Trans. Linn. Soc .xvii. 409. Stems decumbent 
or ascending, 4-10 inches long, somewhat woody : leaves oblong-ovate, acute 
or acutish, 1-3 inches long, cordate at base on petioles 2-8 inches long, den- 
sely white-tomentose beneath, green and flocculent above: peduncles stout, 
naked ,6-18 inches high, nearly glabrous: umbel of 6-10 more or less elonga- 
ted rays, each bearing a short several-ravyed umbellet, subtended by whorls 
of linear-oblanceolate leaflets: flowers yellow to whitish or rose-color, 2-4 
lines long, the stipe-like base short. On rocky banks, Brit. Columbia to 
California and Idaho. , 
* * Densely tomentose perennials with naked pe luncles: involucres 
with 5 short erect teeth: flowers small abruptly narrowed at base, 
pubescent: achenes densely villous. 
E. acaule Nutt. T ¢ G. Proc. Am. Acad. viii, 163.. White-tomentose 
and matted cespitose: leaves densely crowded upon the closely branched 
caudex, oblong to linear with revolute margins, sessile, 2-3 lines long, 
spreading from the imbricated base: involucres in heads of 1-5, among the 
uppermost leaves, nearly sessile short, 3-5-toothed: flowers with broad 
sessile base, hardly 2 lines long, the oblong segments equal: filamemts 
pilose at base: ovary very tomentose with long wool. Sandy hills, Idabo 
to the Rocky Mountains. 
E. minimum Small Bull. Torr. Bot. Club xxv, 47. Gray-canescent: 
branches densely tufted, about 6 lines long: leaves densely imbricated and 
crowded, the persistent ones of previous years black, the fresh ones gray, 
spatulate, or almost terete by the strongly revolute margins, obtuse, dilat- 
ed at base: peduncles erect, 1-3 lines high, simple: involucres solitary , 
turbinate-campanulate a little more than a line high: flowers 1-2 lines 
long, the segments unequal, the 3 outer oval, the 3 inner obovate, all obtuse: 
filaments villous at base. At high elevations in the Cascade Mountains 
of Washington. 
E. pendulum Watson Proc. Am. Acad. xxiii, 265. White-tomentose 
throughout: stems woody at base 1-2 feet high profusely branched: leaves 
scattered, oblong-oblanceolate, 1-3 inches long, obtuse, subglabrate above : 
inflorescence several times di-or trichotomous upon naked peduncles: pedi- 
cels mostly elongated and naked: involucres at first nodding, campanulate, 
about 2 lines long, its deltoid teeth erect: flowers very small,densely tom- 
entose, slightly exserted. On dry rocky plains, eastern base of the Coast 
‘Mountains near Waldo, Oregon. 
§ 2 Involucres campanulate or short turbinate, not angled or 
nerved, with 5 rounded erect teeth, pedunculate in diffuse repeat- 
edly di- or trichotomous panicles: bracts not foliaceous, all tern- 
ate, small, mostly trianglar and rigid: flowers not alternate at 
base: ovary glabrous. 
* Annuals: leaves all radical or nearly so: involucres flowers and 
achenes small. 
E. cernuum Nutt. Journ. Acad. Phila. Ser. 2, 1162. Stem very short: 
scape erect, usually much branched. 6 12 inches high: leaves orbicular or 
oblong-orbicular, less than an inch long obtuse or slightly apiculate, flat. 
floccose-tomentose, especially beneath, petioled: inflorescence paniculate: 
inyolucres campanulate, slightly more than halfa line high solitary on 
