394 Compositaceae 
M.  Involucre 8—10 mm. high, its bracts white-tipped. U. 
A. suffrutescens Gr. 
MM. | Involucre 5—7 mm. high, its bracts yellow-tipped.  E. 
A. confinis Gr. 
LL. Plant herbaceous thruout. 
N. Tips of the involucre-bracts white. 
OQ. Inflorescence glandular. E. A. pedicellata Gr. 
OC. Inflorescence not glandular. 
P. Basal leaves oblanceolate. C. A. hendersoni Pip. 
PP. Basal leaves spatulate. E. A. parvifolia Nutt. 
NN. Tips of involucre-bracts pink. 
Q. Leaves obtuse, spatulate. W.E. A. concinna Nels. 
QQ. Leaves acute, sharply oblanceolate. W.C.E. (A. rosea imbri- 
cata; A. rosea angustifolia. ) 
DL. Plants not stoloniferous. A. rosea GT. 
R. Pappus-bristles of the staminate flowers not dilated at tip. E. 
A. stenophylla Gray 
RR. Pappus-bristles of the staimnate flowers dilated at tip. 
S. Involucre glabrous or nearly so to base. W. E. (A. argentea.) 
A. luzuloides T. & G. 
SS. Involucre very woolly at least at base. 
T. Plant silky-canescent; pistillate heads oblong, the bracts pinkish. C. E. 
A. geyeri Gray 
TT. Plants floccose-woolly; pistillate heads not oblong, the bracts white 
or brownish. 
U. Plant alpine, 5—10 cm. high. W. C. 
A. lanata Gr. 
UU. Plant not alpine, 25—60 cm. high. 
V. Tips of involucre-bracts conspicuously white-papery.  E.. 
A. anaphaloides Rydb. 
VV. Tips of involucre-bracts not conspicuously papery. E. 
A. pulcherrima Gr. 
GNAPHALIUM CUDWEED 
Woolly, erect or diffusely branched. Leaves alternate. Heads all alike, in spikes 
or racemes or head-like clusters, of pistillate and perfect flowers; involucre-bracts imbricate, 
in several series, often partly woolly; receptacle not chaffy. Pistillate corollas minutely 
dentate or 3—4-lobed. Perfect flowers central, few; corolla 5-lobed. Akenes oblong 
or obovate. Pappus-bristles capillary, in | whorl, sometimes united at base. (Gk. 
knaphalon—a lock of wool; referring to the heads. See Anaphalis.) 
A. Leaves green and glandular on the upper side. C. E. (GCG. decurrens californi- 
cum.) G. decurrens Ives (Sticky Cudweed) 
AA. Leaves densely white-hairy on both sides. 
B. Flowers rather loose leaflless clusters; involucre-bracts woolly only at base. 
C. Plants 3—9 dm. high; involucre white or yellow; heads in 1 or more head- 
like clusters; pappus-hairs not united at base. 
D. Involucre white; head-clusters loose. W.C. E. G. microcephalum Nutt. 
DD. Involucre yellowish; head-clusters dense. W.E. (G. sprengelii.) 
G. chilense Spreng. 
CC. Plants 1—3 dm. high; involucre brownish; heads in | spike-like cluster: 
pappus-hairs united at base. W. E. 
‘G. purpureum L. (Purplish Cudweed) 
