4 <H 



i o.Mi'i i.m i \r 



Disk about -" l<roail : leaves linear. 



Disk 3"-6" broad; leaves lanceolate to oblanceolate. 



Leavi s narrowed at the bast, sessile, not decurrent on the stem. 

 Involucre-bracts lanceolate, acute. 

 Involucre bracts spatulate, obtuse, or mucronate. 

 Stem leaves, and sometimes those of the branches decurrent. sagittate. 



Vol.111. 

 i. B. diffusa. 



j. />'. asteroides. 



3. /;. latisquama. 



4. K. decurrens. 



i. Boltonia diffusa Ell. Panicled iioltonia. 

 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, \\"-2." 

 wide, those of the branches very small and subulate ; 

 heads about 2" high ; disk about 2" broad ; rays usually 

 white, l"-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: pi. 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"-l2" 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: 23S. 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. 



