168 COMPOSITE. (COMPOSITE FAMILY.) 



spreading, canescent and obscurely glandular. Synopt. Fl. i. 206. Machce- 

 ranthera canescens, var. latifolia, Gray. New Mexico, Arizona, and Colorado. 



Var. viSGOSUS, Gray. Canescent or cinereous : leaves narrow, rather 

 rigid ; the upper mostly entire, the lower coarsely dentate : involucre cam- 

 panulate or turbinate, squarrose ; the prominent foliaceous tips of the bracts 

 viscid-glandular, either spreading or recurved. Loc. cit. Wyoming to 

 California. 

 -i- - Leaves 1 to 3-pinnately cleft or parted: involucre hemispherical, its bracts 



mostly looser: stem diffusely branched. 



40. A. tanacetifolius, HBK. Pubescent or viscid, very leafy, a foot 

 or two high : lowest leaves 2 to 3-pinnately parted ; uppermost simply pin- 

 natifid or on the flowering branchlets entire : heads ^ inch high : bracts of 

 the involucre narrowly linear, with slender mostly linear-subulate spreading 

 foliaceous tips, or the outermost almost wholly foliaceous : rays numerous, 

 inch long or more, bright violet: akenes rather broad, villous. Machce- 

 ranthera tanacetifolia, Nees. From Nebraska to Texas and westward to 

 Arizona and California. 



14. ERIGERON, L. FLEABANE. 



Heads disposed to be solitary and long-pedunculate ; rays variously colored J 

 disk-flowers yellow, not changing to purple: akenes generally 2-nerved. 



1. Rays elongated and conspicuous, wanting in a few species, occasionally 

 abortive in one or two : no rayless female flowers between the proper raij and 



disk. EUERIGERON. 



* Commonly dwarf from a mullicipilal caudex, alpine or snbafpine, with rather 

 large and mostly solitary heads: involucre loose and spreading, and copiously 

 lanate: rays about 100, narrow: leaves entire. 



1. E. unifloniS, L. Stems an inch to a span or two high, few-leaved, 

 often naked and pedunculiform at summit : radical leaves spatulate or oblan- 

 ceolate, inch or two long ; cauline lanceolate to linear : involucre usually hirsute 

 as well as lanate, occasionally becoming naked ; the linear acute bracts rather 

 close, or merely the short tips spreading : rays purple or sometimes white, 

 2 or 3 or rarely 4 lines long. Alpine, from Colorado and California north- 

 ward and across the continent in high latitudes. 



2. E. lanatUS, Hook. Stems about a span high, scapiform or few-leaved : 

 radical leaves spatulate to obovate, about inch long, tapering into a narrowed 

 base or into a slender margined petiole ; some primary ones occasionally pal- 

 mately 3-lobed ; cauline one or two, small and linear, or hardly any : head 

 not larger than that of the last, and involucre similar, but densely soft-lanate : 

 rays rather broader, 3 lines long, ivhite. Alpine in Montana and British 

 Columbia. 



3. E. grandiflorus, Hook. Stems a span or two high, rather stout, 

 usually several -leai^ed : radical leaves obovate-spatulate, an inch or so long; 

 cauline oblong to lanceolate, usually inch or less long: heads larger: invo- 

 lucre inch high, very woolly ; its linear and attenuate-acuminate bracts squar- 

 rose-spreading or the tips recurved : rays violet or purple, 4 to ^ inch long. 



