are 
Scrophiinidecne 347 
AA. Inflorescence glabrous. 
E. Leaves entire or nearly all so; corolla pale yellow. C. E. 
F. confertus Dougl. 
EE. Leaves all or nearly all not entire; corolla ochroleucous or dull-white. 
F. Leaves ovate to linear-lanceolate, dentate; sterile filaments glabrous. E. 
F. deustus Doug]. 
FF. . Leaves linear-lanceolate, denticulate; sterile filaments bearded. E. (ee 
paniculatus. ) F'. variabilis Suks. 
GROUP 3 
A. Plant glabrous or very nearly so, never glandular-hairy. 
B. Corolla 25—-38 mm. long. 
C. Plants herbaceous at base; sterile filament bearded. 
D. Plant 3—6 dm. high; upper leaves not greatly reduced in size. E. 
P. glaber Pursh 
DD. Plant taller; upper leaves greatly reduced in size. E. 
F. glaber speciosus Rydb. 
CC. Plants woody at base; sterile filament glabrous. 
E. Plant plainly glaucous; corolla broadly funnelform. U. 
F. azureus Benth. 
EE. Plant hardly glaucous; corolla with narrow tube. U. C. 
P, heterophyllus Lindl. 
BB. Corolla 10—1I8 mm. long. 
F. Leaves narrowly linear. 
G. Plant glabrous; leaves 10—-25 mm. long, about 0.5 mm. wide, densely 
crowded near base and some scattered along stem; sterile filaments bearded 
on upper side. FE. P. larcifolium H. & A. 
GG. Plant puberulent; leaves 25-50 mm. long, 2—6 mm. wide, somewhat 
equally scattered along stem; sterile filaments glabrous. E. 
F, cusickii Gray 
FF. Leaves wider than linear, merely some of the uppermost linear. 
H. Plant glaucous; leaves coriaceous. E. 
FP. acuminatus Doug. 
HH. Plant not glaucous; leaves not coriaceous. 
I. Flowers loosely clustered; peduncles viscid-puberulent; sepals not erose 
nor scarious-margined. E. 
P. gracilentus Gray 
II. Flowers in 2—3 head-like clusters; peduncles glabrous; sepals erose and 
scarious-margined. W.C. E. (P. pulchellus.) 
P. procerus Doug]. 
AA. Plant not glabrous, usually glandular-hairy above and sometimes below. 
J. Stem-leaves oblanceolate to spatulate. E. 
' Pf, kingii Wats. 
JJ. Stem-leaves not oblanceolate nor spatulate except occasional leaves. 
K. Stem not ashy-puberulent. 
L.  Stem-leaves linear; basal-leaves narrowly spatulate. 
M.  Stem-leaves all opposite; sepals about 4 mm. long; corolla nearly tubu- 
lar, 1.6—2 cm. long. E. (P. oreganus.) 
P. gairdneri oreganus Gray 
MM. Uppermost stem-leaves alternate; sepals 5—10 mm. long. 
N. Calyx 5—8 mm. long; corolla nearly tubular, 1.2—2 cm. long. (P. 
‘macbridet.) C. E. F. gairdneri Hook. 
