1394 CARDUACEAE 
spicuous, those of the main branches linear or linear-spatulate, mainly 2—4 em. 
long, those of the Mons iere to subulate seales or obsolete, all or some 
of them with soft subulat SEDE ines in or above their axils: heads scattered: in- 
voluere n 4—4.0 mm. high; pots e late attenuate: PA 
flowers few; ligules idi 4 mm. long, whi chen abrous.—Sand flats, 
river "valley and moist soil, various a La. to Tex., and Calif.—Late 
—wint.— (M ez.) 
Ek 
& 
me 
39. DOELLINGERIA Nees. Perennial, relatively tall, aster-like herbs. 
Leaves alternate: blades relatively broad, veiny, entire or nearly so. Heads 
in a terminal eorymb. Involucres campanulate to hemispheric, several-many- 
flowered: braets various, the inner scarcely wider than the outer but much 
longer. Ray-flowers few or several: corollas with a long tube and a white or 
cream-colored ligule. Disk-corollas with a funnelform throat and a long tube: 
lobes lanceolate. Pappus of 2 distinct series, the outer series of short bristles 
or d the inner of elongate capillary bristles.—A bout 5 species, eastern 
rth American.—WHITE-TOPPED ASTERS. 
Ray -flowers with ‘linear ligules over 10 mm. long: inner bracts E the involucre 
acuminate. . D.reticulata. 
Ray-flowers with oblong ligules less than 10 mm. long: inner 
bracts 
de. 
Involucral bracts acute or acutish, the inner linear, ciliate 
at the tip 2. D. umbellata. 
Involucral bcs obtuse, the inner du ipis eciliate. 3. D. humilis. 
Achene much flattened, ribbed, over 1 mm. wide. 4. D. infirma. 
1. D. pistas (Pursh) Greene. Stem 3-12 dm. tall, fastigiate-corymbose 
above: blades of the upper leaves pics to obovate, n or merely acutish, 
reticulate: inner bracts of e 
6—7 mm. lon [Aster reticulatus Pursh. d— 
Low pinelands, Coastal Plain, Fla. to S. C.— 
Spr.-sum. | 
2. D. umbellata (Mill) Nees. Stem 6-25 ` 
m. tall, corymbose above: blades of the 
upper leaves membranous, elliptie, usually 
narrowly so, or lin near lanceolate, usually 
acu par inner braets of the involuere 
3—4 ong: pappus soft. [Aster wmbel- 
latus od —Shaded ae and in thickets, 
various provinces, Ga. to Ia., Sask., and 
Newf.—Sum.-fall. 
3. D. humilis (Willd.) Britton. Similar 
D. umbellata in habit, but more stocky: blades of the upper leaves shorter, 
firm, elliptic, ovate, or ‘oval, ied n bracts of the involucre 4—5 mm. long: 
pappus soft. [ Ast er amygda lin . & G.]—Stream-banks and acid swamps, 
Coastal Plain and adj. provinces, oh. to Tex., Pa., and N. J.—Sum.-fall. 
D. infirma (Michx.) Greene. Stem 4-12 dm. tall, often widely branched: 
ean of the upper | cde in 0 Ma varying to broadest ids or below 
. long: di 
middle, RE ie er bracts of the involucre 3—4 m ng: disk- 
e as 3-4 m a p nu ssi id. rast er a Michx. ]—Dry woods = 
banks, various poii rarely Coastal Plain, La. to Ala., Tenn., and Mas 
Sum.-fall. 
