556 COMPOSITAE (COMPOSITE FAMILY) 



very rarely none. Achenes narrow, from clavate-linear to cuneate-oblong, 

 mostly 4-angled. Pappus of nerveless and mostly pointless scales. 



Plants small, 1 dm. or less high; heads sessile or nearly so . . .I.E. Wallacei. 

 Plants 1-3 dm. high; heads pedunculate 2. E. integrifolium. 



1. Eriophyllum Wallacei Gray, Proc. Am. Acad. 19: 25. 1883. Stem 

 freely branching from the base; the branches ascending, 2-10 cm. high; the 

 copious matted wool tardily or not at all deciduous: leaves spatulate or obo- 

 vate, obtuse, mostly entire, 1 cm. or less long: heads short-pedunculate; in- 

 volucre 5 mm. high, the overlapping bracts not united: receptacle low-conical, 

 obtuse: rays about 10, yellow, 4 mm. long and nearly as broad: anther-tips 

 subulate: style-branches conical, acutish: scales of the pappus 6-10, oblong or 

 obovate, obtuse, erose, one half to one fourth as long as the corolla. Desert 

 soils; southern Wyoming to Arizona and California. 



2. Eriophyllum integrifolium (Hook.) Greene, Fl. Fran. 444. 1891. Low, 

 often dwarf, caespitose, 1-3 dm. high: leaves narrowly spatulate and entire to 

 more dilated and 3-lobed, floccosely hoary: heads rather long-peduncled ; in- 

 volucre cylindrical, of 6-8 narrowly oblong bracts: achenes glabrous, rarely 

 somewhat glandular-atomiferous near the summit; scales of the pappus mostly 

 of the same length, about equaling the very glandular but not hirsute corolla- 

 tube. (E. multiflorum Nutt.) In the mountains; Wyoming to California and 

 Washington. 



67. PLATYSCHKUHRIA (Gray) Rydb. 



Herbaceous from a perennial caudex. Leaves all alternate and entire, 

 coriaceous. Scales of the pappus about 10, linear-lanceolate, with a distinct 

 excurrent or percurrent costa. Section Platyschkuhria Gray, under Bahia. 



1. Platyschkuhria integrifolia (Gray) Rydb. Bull. Torr. Bot. Club 33: 155. 

 1906. Cinereous-puberulent and glabrate, upper part of the scapiform stem 

 and involucre minutely glandular, 1-3 dm. high: leaves nearly all radical, 

 oval or spatulate-oblong, tapering into a slender petiole: heads solitary or 

 few and somewhat corymbosely paniculate, 10-12 mm. high; involucre of 

 about 10 oblong bracts: rays 6-9, oblong: pappus fully half the length of the 

 cuneate-linear, sparsely hairy achene; the thin margins of the scales of the 

 pappus erose. Bahia nudicaulis. Arid areas; Wyoming and Colorado. 



68. BAHIA Lag. 



Ours are herbaceous plants, sometimes canescent but not woolly, with op- 

 posite or sometimes alternate leaves and rather small pedunculate heads of 

 yellow flowers terminating the branches. Involucre hemispherical or obovate 

 and lax or open in fruit; the plane bracts distinct to and commonly narrower 

 at the base, not embracing achenes. Receptacle mostly flat. Pistillate flowers 

 with exserted ligules, or rarely none. Achenes narrow, quadrangular. Pappus 

 of several scarious scales. Includes Picradeniopsis Rydb. and Achryopappus 

 H.B.K. 



Perennial from a lignescent root 1. B. oppositifolia. 



Annuals. 



Rays none; leaves mainly opposite 2. B. neo-mexicana. 



Rays conspicuous; leaves mainly alternate . . . . . 3. B. dissecta. 



1. Bahia oppositifolia Nutt. T. & G. Fl. 2: 376. 1842. Tufted, 1-2 dm. 

 high, fastigiately branched and many-stemmed, very leafy up to the short- 

 peduncled heads, cinereous with fine close pubescence: leaves petioled, pal- 

 mately or pedately 3-5-parted into linear divisions little broader than the 

 margined petiole: bracts of the involucre oblong or oval, comparatively close: 

 rays 5 or 6, oval, hardly surpassing the disk-flowers: achenes slender, glan- 

 dular; pappus half the length of the corolla-tube. Sterile hills and plains; 

 Nebraska to Wyoming and New Mexico. 



