938 MISC. PUBLICATION 423, U. S. DEPT. OF AGRICULTURE 



4. Antennaria umbrinella Rydb., Torrey Bot. Club Bui. 24: 302. 



1897. 

 San Francisco Peaks, Coconino County (Little 4637 (?), 4708, 4718). 

 Montana to British Columbia, south to Colorado and Arizona. 



5. Antennaria arida E. Nels., Bot. Gaz. 27: 210. 1899. 



San Francisco Peaks, Coconino County (Purpus in 1902, Hitchcock 

 in 1915). Montana to New Mexico and northern Arizona. 



36. ANAPHALIS. Pearl-everlasting 



Erect perennial herb, usually 30 cm. high or more, tomentose, 

 at least on the stem and the lower leaf surf ace ; leaves alternate, linear 

 or linear-oblong, entire, slightly or not at all decurrent; heads in close 

 cymose panicles, discoid or disciform, subdioecious, the pistillate ones 

 usually with a few central hermaphrodite flowers; involucre strongly 

 graduated, of milk-white papery-scarious phyllaries, radiating when 

 dry; achenes short; pappus of capillary bristles, these not united at 

 base. 



1. Anaphalis margaritacea (L.) A. Gray, Amer. Acad. Arts and Sci. 

 Proc. 8: 653. 1873. 



Gnaphalium margaritaceum L., Sp. PL 850. 1753. 



The Arizona form of this variable species is nearest var. subalpina 

 Gray, although not typical. "Buckskin Mountains," Kaibab Plateau, 

 Coconino County (Jones 6056 k), "northern Arizona" (Mrs. E. P. 

 Thompson 383), flowering late summer and autumn. South Dakota 

 to British Columbia, south to Utah and northern Arizona. 



37. GNAPHALIUM. Cudweed, everlasting 



Low herbs, more or less woolly; leaves alternate, narrow, entire; 

 heads small, usually numerous, sometimes glomerate, disciform, all 

 the flowers fertile; involucre graduated, of numerous scarious phyllar- 

 ies; outer flowers numerous, pistillate, the inner ones hermaphrodite; 

 receptacle naked; pappus of capillary bristles. 



Key to the species 



1. Pappus bristles united at base and deciduous in a ring; heads spicate; phyllary 



tips normally deep purple or brownish 9. G. purpureum. 



1. Pappus bristles not united at base, falling separately or in groups (2). 



2. Heads very small, clustered and imbedded in wool, the clusters leafy-bracted; 

 involucre scarcely graduated, the scarious tips of the phyllaries relatively 

 inconspicuous; low annuals, seldom more than 20 cm. high (3). 

 3. Plant thinly but rather closely woolly; leaves linear-spat ulate or linear, 

 1 to 3 mm. wide; inflorescence (when well developed) spiciform. 



7. G. GRAYI. 



3. Plant loosely floccose- woolly ; leaves spatulate to oblong or obovate, 3 



to 8 mm. wide; heads clustered at the tips of the stem and branches, 



not spicately arranged 8. G. palustre. 



2. Heads medium-sized, not leafy-bracted; involucre strongly graduated, the 



phyllaries conspicuously scarious nearly throughout; plants usually 30 



cm. high or more (4). 



4. Leaves gray-tomentose above as well as beneath, sometimes (in G. arizoni- 



cum) only thinly so (5). 

 5. Leaves not at all or only obsoletely decurrent; phyllary tips white or 

 slightly tinged with straw color, mostly obtuse. _ 1. G. wrightii. 



