a, 



a 
Compositaceae 427 
A. None of the branchlets pine-like; pappus light-brown; akene 8-ribbed. E. 
L. juncea Dow. 
AA. Some of the branchlets spine-like; pappus white; akene 4—5-ribbed. E. (Spi 
nosa lanata.) L. spinosa Nutt. 
AGOSERIS (Troximon) GOAT CHICORY 
Annual or perennial, acaulescent or nearly so. Leaves basal, entire to pinnatifid. 
Heads solitary on simple elongated scapes; involucre-bracts usually lanceolate, imbricated 
in few series, the outer loose and often somewhat foliaceous; receptacle flat, naked. Co- 
rolla yellow. Akene oblong or linear, terete, 10-ribbed or -ridged, apex contracted into 
a neck or prolonged into a beak. Pappus of bristles; bristles copious, white or whitish, 
capillary, merely scabrous. (Gk. aix—a goat, seris—chicory. ) 
A. Akene beakless, 10-ridged to the pappus; alpine plant: leaves glabrous. C. 
A. alpestris Gr. 
AA. Akene beaked. 
B. Beak of the akene shorter than the body, stout, mostly ridged. 
C. Leaves glaucous, glabrous. C.E. (A: glauca aspera; A. glauca scorzonerae- 
folia.) A. glauca Gr. 
CC. Leaves not glaucous, glabrous or hairy. 
D. Plant tomentose up to the involucre. E. 
A. tomentosa How. 
DD. Plant not tomentose except sometimes near base. 
E. Leaves or some of them not entire. 
F. Leaves pubescent; leaf-lobes linear. E. 
. A. arachnoidea Rydb. 
FF. Leaves glabrate; leaf-lobes not linear. 
A. barbellulata Gr. 
EE. Leaves all entire; plant glabrous or nearly so thruout. 
G. Involucre-bracts acuminate; beak of akene ridged. E. 
A. parviflora Gr. 
GG. Involucre-bracts acute or obtuse; beak of akene not ridged. C. E. 
A. aurantiaca Gr. 
BB. Beak of the akene as long or slightly longer than the body. 
H. Flowers orange; most of the leaves entire, narrowly linear, scape not tomentose 
near top. W.C.E. A. gracilenta Gr. 
HH. Flowers yellow; most of the leaves not entire; scape not tomentose near top. 
I. Akene together with its beak 8—10 mm. long; involucre tomentose. W. C. 
E A. elata Gr. 
II. Akene together with its beak 12—15 mm. long; involucre pubescent. W. 
A. asparigoides Gr. 
HHH. Flowers deep saffron-colored; most of the leaves lobed or toothed; scapes 
tomentose near top. C. E. 
A. purpurea Gr. 
BBB. Beak of the akene slender, not ridged, 2 or more times as long as the 
body. 
J. Pappus almost as long as the beak of the akene. W. 
A. hirsuta sai see 
; appus much shorter than the beak of the akene. 
K. 5 Pevennial: heads 2—4 cm. high; beak of akene 10—25 mm. long. 
L. Apex of akene attenuate, its beak 10—18 mm. long. 
M. Heads 2 cm. high.  W. E. 
A. laciniata Gr. 
