CARDUACEAE | 1337 
forms often BE the ee ard of two species Duns involved. One 
a stron odor, broad, el asping, ~ toothed upper lea blades 
and death viscid involueres, the other ae nly a faint odor, narrow entire 
upper leaf-blades and very viscid n ou 
20. AMPHIACHYRIS DC. Annual or perennial, glabrous herbs. 
Leaves alternate: blades narrow, entire. Heads small. Involucre campanulate 
to cylindric, the bracts obtuse. Ray-flowers with 
small ligules. Disk-corollas with a cylindric-cam- 
panulate throat. Anthers narrow. Stigmas pubes- 
cent. Achenes of the ray with a crown-like pappus, 
those of the disk abortive, with bristle-like pappus- 
seales.—T' wo species, North American. 
A. dracunculoides (DC.) Nutt. Stem 3-7 dm. 
tall: Ea s narrowly linear or linear-filiform, 
1-5 ong; braets of the involuere dde the 
inner ps long: ligules yellow, 3-4 mm. lon 
achene anon 1 mm. long.—Dry s soil, various provinces, N of Coastal Plain, 
Ala. to Tex., N. M. , Kans., and Mo. — Sum 
1. GRINDELIA Willd. Perennial or iiA annual or biennial herbs, 
or woody, often glutinous plants. Leaves alternate: blades mostly spinulose 
toothed. Heads large. Involuere hemispheric or ee the bracts slender- 
g- is rowly funnelform throat longer than the tube. 
Anthers linear; a lanceolate. Stigmas linear. Achene ribbed. Pap- 
pus of the disk ‘of 2-8 smooth awns or stiff bristles, caducous.—About 30 species, 
western eee STICK Y-HEADS. | 
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Leaf-blades coarsely Spiny-toothed : achene 2-lobed at the apex. 1. G. lanceolata. 
Leaf-blades finely spiny-toothed : achene truneate at the apex. 2. G. squarrosa. 
G. lanceolata Nutt. Stem 5-8 dm. tall glabrous, usually sparingly 
T above: blades of the p obs 2 s to linear-lanceolate or 
ng, mo r less acuminate 
Imost linear, 2-8 cm. long, e 
bra of the involuere with SR ru poc WY il 
3-3.5 mm. long, 2-lobed at the apex, rather bluntly $ Y, 
ib ed.—Dry soil, barrens, prairies and waste-places, GANN y il | 
nn. WV: 
various provinces, Ala. to Tex., Kans., and Tenn.— 
Sum 
2. G. squarrosa (Pursh) Dunal. Stem 3-10 dm. 
tall, n more or less branched above and 
as 
sometimes also 
abis pen eliptic e s -elliptie or somewhat 
bro e. ned upward, 2-5 long, obtuse or aeute: 
braets of the involuere with recurved tips: achene 2.5-3 mm. long, truncate 
at the apex, rather sharply ribbed.—Dry soil, prairies and plains, various 
provinces, Tex. to Ariz., Nev., Sask., and Minn.; widely naturalized on road- 
sides, railroad banks, and fields in he E states.—(Menz.). 
22. CHRYSOPSIS Nutt. Biennial herbs, with villous, hirsute, floccose, 
eottony, or arachnoid pubescence. Leaves alternate: blades narrow or broad, 
but neither nervose nor gramineous, mostly entire. Heads in a terminal corymb. 
