200 COMPOSITiE. (COMPOSITK FAMILY.) 



16. BOI<t6niA, L'Her. Boltonia 



Heads many-flowered, radiate ; the rays numeroas, pistillate. Scales of tho 

 hemispherical involucre imbricated somewhat in 2 rows, appressed, with narrow 

 membranaceous margins. Receptacle conical or hemispherical, naked. Ache- 

 nia flat, obovate or inversely heart-shaped, margined with a callous wing, or in 

 the ray 3-winged, crowned with a pappus of several minute bristles and fre- 

 quently with 2-4 longer awns. — Perennial and bushy-branched smooth herbs, 

 pale green, with the aspect of Aster ; the thickish leaves chiefly entire. Heads 

 loosely corymbose or panicled: disk yellow: rays white or purplish. (Dedi- 

 cated to /. Bolton, an English botanist.) 



1. B. asteroides, L'Her. Leaves lanceolate; achenia broadly oval; 

 pappus of few minute bristles and no awns. — Moist places along streams, 

 Pennsylvania (Bartram) and southward along the AUeghanies : rare. Oct. — 

 Plant usually 6° high. 



2. B. glastifolia, L'Her. Leaves lanceolate, ascending, often turned 

 edgewise by a twist ; achenia obovate, broadly winged ; pappus of several short 

 bristles and, especially in the disk, of 2 or 3 short awns. — Kich moist soil, 

 Pennsylvania to Illinois and southward. Sept. — Plant 2° - 4° high. 



17. BELLiIS, Toum. Daisy. 



Heads many-flowered, radiate ; the rays numerons, pistillate. Scales of the 

 involucre herbaceous, equal, in about 2 rows. Receptacle conical, naked. 

 Achenia obovate, flattened, wingless, and without any pappus. — Low herbs 

 (all but one species natives of the Old World), either stemless, like the true 

 Daisy, B. perennis, or leafy-stemmed, as is our species. (The Latin name, 

 from bellus, pretty.) 



1. B. integ^rifulia, Michx. (Western Daist.) Diffusely branched 

 and spreading (4'- 9' high), smoothish; leaves lanceolate or oblong, the lower 

 spatulate-obovate ; heads on slender peduncles ; rays pale violet-purple, g) @ 

 — Prairies and^banks, Kentucky and southwestward. March -June. 



18. BRACH¥CII^TA, Toit. & Gr. False Golden-kod. 



Heads and flowers nearly as in Solidago, except the pappus, which i^ a row 

 of minute rather scale-like bristles shorter than the achenia. — A perennial herb, 

 with rounded or ovate serrate leaves, all the lower ones heart-shaped ; the small 

 yellow heads in sessile clusters racemed or spiked on the branches. (Name com- 

 posed of /3pa;^usj short, and x^^'^Vi bristle, from the pappus.) 



1. B. cordata, Torr. & Gr. (Solidago cordata, Short.) Wooded hills, 

 E. Kentucky and southward. Oct. — Plant 2°-4° high, slender, more or less 

 pubescent. 



19. SOr,II>AGO, L. Golden-bod. 



Heads few - many-flowered, radiate ; the rays 1 to 16, pistillate. Scales of 

 the oblong involucre appressed, destitute of herbaceous tips (except No. 1). 

 Receptacle small, not chaffy Achenia many-ribbed, nearly terete. Pappus 



