é 
404 
Disk about 2” broad; leaves linear. 
COMPOSITAE. Vor. III. 
1. B. diffusa, 
Disk 3”-6” broad; leaves lanceolate to oblanceolate. 
Leaves narrowed at the base, sessile, not decurrent on the stem. 
Involucre-bracts lanceolate, acute. 2. B. asteroides. 
Involucre-bracts spatulate, obtuse, or mucronate. 3. B. latisquama. 
Stem leaves, and sometimes those of the branches decurrent, sagittate. 4. B. decurrens. 
1. Boltonia diffisa Ell. Panicled Boltonia. 
Fig. 4275. 
Boltonia diffusa Ell. Bot. S. C. & Ga. 2: 400. 1824. 
Paniculately much branched, 2°-7° high, the branches 
very slender or filiform. Leaves linear, or the lower 
linear-lanceolate, acutish, the larger 1’-2’ long, 14”-2” 
wide, those of the branches very small and subulate; 
heads about 2” high; disk about 2” broad; rays usually 
white, 1-2” long; involucre broadly campanulate, its 
bracts oblong or oblong-lanceolate, acutish or obtuse; 
achenes obovate, narrowly winged; pappus of several 
short scales and 2 subulate bristles shorter than the 
achene. 
In dry soil, southern Illinois to Texas, east to South Caro- 
lina and Florida. Aug.—Oct. 
2. Boltonia asteroides (L.) L’Her. Aster- 
like Boltonia. Fig. 4276. 
Matricaria asteroides L. Mant. 116. 1767. 
Matricaria glastifolia Hill, Hort. Kew. 19: pl. 3. 1769. 
Boltonia glastifolia L’Her. Sert. Angl. 16. 1788. 
Boltonia asteroides L’Her. Sert. Angl. 16. 1788. 
Rather stout, 2°-8° high, somewhat cymosely @ 
paniculate. Leaves lanceolate, to oblanceolate, ses- 
sile, 2’-5’ long, 3-12” wide, the upper linear-lanceo- 
late, smaller; heads 2’~4” high; disk 3-6” wide; 
rays white, pink or purple, 3-6” long; involucre 
hemispheric, its bracts lanceolate or oblong-lanceo- 
late, acute or acuminate; pappus of setose scales, 
with or without 2-4 slender bristles nearly as long 
as the obovate or oval achene. 
In moist soil, Connecticut to Florida, west to Minne- 
sota, Nebraska and Louisiana. July—Sept. 
3. Boltonia latisquama A. Gray. Broad- 
scaled Boltonia. Fig. 4277. 
Boltonia latisquama A. Gray, Am. Journ. Sci. (II) 
33: 238. 1862. 
Similar to the preceding species and perhaps a 
race of it. Leaves lanceolate, acute, sessile; heads 
rather larger; rays violet-blue; bracts of the in- 
volucre oblong-spatulate, obtuse or mucronate; 
pappus of numerous small short broad scales and 
2 long bristles. 
Western Missouri, Kansas, Arkansas and Okla- 
homa. Autumn. 
