200 COMPOSITE. (COMPOSITE FAMILY.) 



16. BOLTONIA, L'Hei. BOLTONIA. 



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

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

 mcmbranaceous 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. Head* 

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

 cated to /. Bolton, an English botanist.) See Addend. 



1 . 15. asteroides, I/Her. Leaves lanceolate ; achenia broadly cval ; 

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

 Pennsylvania (Bartram) and southward along the Alleghanies : 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. Ricji moist soil 

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



17. B ELLIS, Tourn. DAISY. 



Heads many-flowered, radiate ; tke rays numerous, 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. integrifolia, Michx. (WESTERN DAISY.) Diffusely branched 

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

 spatulate-obovate ; heads on slender peduncles ; rays pale violet-purple. @ 

 Prairies and banks, Kentucky and south westward. March -June. 



18. BRACHYCBLETA, Torr. & Gr. FALSE GOLDEN-ROD. 



Heads and flowers nearly as in Solidago, except the pappus, which is 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 /Spa^us, short, and X a ' ir n-> bristle, from the pappus.) 



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

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

 pubescent. 



19. SOLIDAGO, L. GOLDEN-ROD. 



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 



