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HEMIONZAT | COMPOSIT 349 
CALYCADENIA , 
glandular-bearded. Bracts of the involucre in a single series, ob- 
long or lanceolate, concave or convolute and partly enclosing the 
ray-achenes. Receptacle flat, chaffy throughout, the scales of the 
outer series united. Style-appendages of the disk-flowers linear 
or subulate, acute, very hispid. Achenes glabrous: those of the 
ray obovoid, gibbous or slightly obcompressed, convex on the 
back, slightly stipitate, the apex mostly oblique and terminated 
with a small often papillose exserted or beaked areola ; of the disk 
sterile or abortive, oblong, 5-7-nerved. Pappus none. 
H. luzulefolia DC. 1. c. Tomentose-canescent: stems erect, 6-18 
inches high, corymbosely branched above, the branches and involucre hir- 
sute Pik 9 somewhat viscid: leaves linear-lanceolate, silky-villous, not 
glandular, 1-5 inches long by 2-4 lines broad, the lower elongated, tapering 
to the base, denticulate, 3-5-nerved, sometimes opposite: heads numerous, 
3-4 lines broad, many-flowered : involucre hemispherical, its bracts rather 
shorter than the disk, with short and broadish herbaceous tips: rays 5-10, 
rather large, white to pinkish: scales of the receptacle united into a cup. 
Open grounds and fields, southern Oregon and California. 
H. Clevelandi Greene Bull. Torr Club ix, 109. Stems stoutish, 10-20 
inches high, branching from near the base, villous with long spreading 
hairs, glandular above: leaves norrowly linear, 1-nerved, silky beneath: 
heads racemosely or spicately disposed along the slender branches: rays 
white. In fields and open places, southern Oregon and California. 
53 CALYCADENIA DO, Prodr. v, 695. 
Slender annuals with rigid chiefly alternate narrowly linear or 
- subulate 1-nerved leaves with revolute margins, the upper ones 
usually terminated by a large saucer-shaped gland. Heads 
many-flowered ; the ray-flowers 3-5, pistillate, 3-lobed or 3-parted, 
with slender tube; disk- flowers tubular, perfect but mostly infer- 
tile. Involucre leafy-bracteate at base, its bracts in a single series, 
concave, partly enclosing the ray-achenes. Receptacle small, flat, 
with a single series of distinct or united chaff between the ray- 
end disk-flowers, Disk-flowers funnelform, 5-toothed, their style- 
branches with long filiform hirsute appendages. Achenes some- 
what hairy: those of the ray obovoid-triangular, without pappus: 
of the disk quadrangular, tapering to the base, infertile, with a 
pappus of 5-10 chaffy and mostly awned scales. | 
'C. truncata DC. l.c. Hemizonia truncata Gray. Very smooth and 
glabrous: stems 1-2 feet high, simple or spa ingly branched adove: leaves 
linear, 1-3 inches long, the lower ones opposite: heads campanulate; 4 or5 
lines high: bracts of the involucre ovate-oblong, boat-shaped: ray-flowers 
5-8, 3 lobed, the middle lobe smallest: chaff of the receptacle 7-9, lightly 
united at the top into a truncate cup, at length separable: disk- flowers 10- 
20, with a pappus of 7-10 oblong and somewhat erose-fimbriate pointless 
pales: much shorter than the achene, s metimes obsolete. On dry plains, 
southern Oregon to California. 
C. multiglandulosa DC. 1. c. Stem simple or diffusely much branch- 
ed, 1-2 feet high, strigose-hirsute: leaves mostly scattered, linear, mostiy 
with revolute margins, hirsutely ciliate; sessile: heads numerous, terminal 
on short lateral branchlets, campanulate, 4 lines high: bracts of the invo- 
lucre linear, bristly-ciliate, with numerous tack-shaped glands on their 
