3S0 COMPOSITE anaphales 



GNAPHALIUM 



30 ANAPHALTS DC. Prodr. vi, 241. 



White-tomentose woolly perrenial herbs with leafy, erect stems 

 entire leaves and numerous small discoid heads of yellow disk 

 flowers. Heads dioecious but usually with a few hermaphrodite 

 flowers in the centre of the pistillate heads. Bristles of the pap- 

 pus of the staminate flowers but little if at all thickened at the 

 apex; of the pistillate flowers not united at base but falling sep- 

 arately. 



A. margaritacea B. & H. Gen. ii, 303. Stems stout, 1-2 feet high, 

 tuHed, very leaiy, the white floccose wool rarely becoming tawny : leaves 

 from rather broadly to linear lanceolate, 2-6 inches long, white-woolly be- 

 neath, soon glabrate and green above, the broadei ones indistinctly 3- 

 nerved: heads numerous, corymbosely cymose: involucre globnlar, its 

 numerous bracts almost wholly pearly-whie : achenes oblong. Common 

 on dry ridges in forests, Alaska to California and across the continent. 



30 GNAPHALIUM L. Gen. n. 943. Cudweed. 



Floccose-woolly herbs with sessile, and sometimes decurrent 

 leaves and commonly numerous heads of s mall flowers in cym- 

 ose clusters or glomerules. Heads heterogamous, discoid, fertile 

 throughout, of few or many series of pistillate flowers surround- 

 ing a smaller number of hermaphrodite ones. Involucre pluri- 

 serial, imbricated, the scarious and commonly partly woolly 

 bracts with or without colored papery tips or appendages. Style 

 of hermaphrodite flowers 2-cleft. Pappus of numerous merely 

 scabrous capillary bristles in a single series. Achenes terete or 

 flatfish, mostly nearly nerveless. 



§ 1 Eugnaphalium DC. Prodr. vi, 122. Bristles of the pap- 

 pus not at all united at base, falling separately. 



* Involucre woolly only at base, mainly scarious : heads paniculately 

 or corymbosely cymose, or glomerate at the fcu mm it of the leafy sem 

 and branches. 



<x. microcephalum Nutt. Trans. Am. Phil. Soc. vii, 404 ^ Densely 

 white-woolly throughout: stems slender, 1-2 feet high, from a biennial or 

 more enduring root : leaves linear or the lower spatulate-lanceolate, with 

 slenderly decurrent base, persistently white-wooliy, 1-2 inches long : heads 

 small, in small panicnlate glomerules : involucre from turbinate to cam- 

 panulate, 1-2 lines high, woolly at base, its ovate-lanceolate bracts mostly 

 unequal, acute, pearly-white. On dry bars and bluffs along water-courses, 

 Brit. Columbia to California. 



G. Sprengelii H.&A. Bot. Beech. 150. Stems stout and strict, 1-3 feet 

 high from a biennial root : leaves lanceolate or linear or the lowest narrow- 

 ly spatulate, densely white-woolly or sometimes more thinly floccose, the 

 short decurrent base or adnate auricles rather broad: heads numerous, in 

 single to numerous glomerules, terminating the stem or few branches: in- 

 volucre hemispherical, 3 lines high, white or yellowish, becoming slightly 

 rusty in age, its bracts thin, oval and oblong, obtuse. Common on moist 

 river-banks, Brit Columbia to California. 



G. deeurrens Ives Am. Journ, Sci. i, 380, t. 1. Stems strict, 2-3 feet 

 high, corymbosely branched at the top and bearing cymulosely disposed 



