1 90 Flora of the Palouse Region 



A. racemosa Hook. Perennial by stout leafy stolons: stems slender, 

 erect, 15-40 cm. high, glabrous or nearly so: basal leaves oval or ovate, ob- 

 tuse, green and glabrous or glabrate above, white-woolly beneath, 1-3 cm. 

 long, cuneate at base, petioled: cauline sessile, lanceolate, mostly acute, 1-3 

 cm. long: inflorescence glandular, racemose or somewhat paniculate: stam- 

 inate heads always racemose, subglobose, 4-6 mm. high, slender-peduncled, 

 the involucral scales brownish, obtuse: pappus with thickened tips: pistillate 

 heads usually corymbose, oblong, 6-8 mm. long, the involucral scales green- 

 ish, narrow-tipped: pappus simple. Open woods, Thatuna Hills. 



A. luzuloides Torr. and Gray. Tufted perennial, 10-40 cm. high, silvery 

 throughout and closely woolly: leaves numerous, linear or linear-lanceolate, 

 acute, the lowest petioled, the upper sessile, 2-10 cm. long: heads numerous, 

 in corymbs, yellowish-white; staminate subglobose, 4 mm. high; the inner 

 involucral bracts obtuse, with ivory-white papery tips: pappus with much di- 

 lated obtuse tips: pistillate heads oblong, 4-5 mm. long; the pale involucral 

 bracts thin, scarious at the tips: akenes glandular. Stony hillsides, com- 



314. GNAPHALIUM. 



Woolly herbs: leaves alternate, entire: heads small, discoid: 

 pistillate flowers very numerous, in more than one row; perfect 

 flowers fewer in the center; staminate flowers none; all white or 

 yellow: pappus-bristles slender, not thickened above: akenes ob- 

 long or ovate. 



Low, much branched. G. paiaistris. 

 Tall, 30-60 cm. high. 



Sticky-glandular. G. decurrens. 



Woolly, not glandular. G. SPRENGELH. 



H. palustris Nutt. Annual, much branched at base, 5-12 cm. high, very 

 woolly throughout: leaves lanceolate, oblong or spatulate, 1-2 cm. long: 

 heads" 2-3 mm. high, sessile, in small terminal or axillary clusters, which are 

 very woolly and subtended by leaves: involucre of few scales, these linear, 

 acute or obtuse, brownish with white tips: akenes glabrous, the bristles fall- 

 ing separately. Common in dried-up pond bottoms. 



G. decurrens Ives. Perennial, erect, 30-60 cm. high, glandular beneath 

 a thin early-deciduous tomentum: basal leaves spatulate; cauline spatulate- 

 lanceolate or linear-lanceolate, acute, all conspicuously decurrent at the base, 

 2-5 cm. long: heads in dense clusters, these usually corymbed: involucre 

 turbinate-campanulate, yellowish-white: bracts thin, scarious, ovate-lanceo- 

 late, mostly acute: akenes smooth. Open woods, Thatuna Hills. 



G. spreilgelii Hook & Arn. Biennial (?), erect, very leafy, 30-60 cm. 

 high, simple or branched below, persistently tomentose, not glandular: 

 leaves linear-lanceolate or somewhat spatulate, acute, 5-8 cm. long, scarcely 

 decurrent at base: heads 4-5 mm. high, in one or few dense clusters: invol- 

 ucre hemispheric, the bracts greenish-white, oblong, obtuse: akenes gland- 

 ular. Low ground, Pullman, rare. 



