COMPOSIT^o (composite FAMILY.) 253 



18c BRACHYCHJETA, Torr. & Gray. 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 acheue. — 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 

 composed of fipaxvs, short, and x"'"''^) bristle, from the pappus.) 



1. B. COrdata, Torr. & Gray. Wooded hills, S. Ind. and E. Ky. to 

 N. Ga. Oct. — riaut 2-4° high, slender, more or less pubescent. 



19. BELL IS, Tourn. Daisy. 



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

 volucre herbaceous, equal, in about 2 rows. Receptacle conical, naked. Achenes 

 obovate, flattened, wingless, and without any pappus. — Low herbs (all but our 

 single species natives of the Old World), either stemless, like the true Daisij, 

 B. PERENxis (which is found as an occasional escape from cultivation), or 

 leafy -stemmed, as is the following. (The Latin name, from bellus, pretty.) 



1. B. integrifolia, Michx. (Western Daisy.) Annual or biennial, 

 diffusely branched (4'-l° high), smoothish ; leaves lanceolate or oblong, the 

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

 — Prairies and banks, Ky. and southwestward. March- June. 



20. APHANOSTEPHUS, DC. 



Involucral scales in few series, broadly lanceolate, the outer shorter. 

 Achenes prismatic, the broad truncate apex bearing a short coroniform pap- 

 pus. Otherwise as Bellis. — Southwestern leafy-stemmed and branching pu- 

 bescent herbs, with solitary terminal daisy -like heads. {'Acpavfjs, inconspicuous, 

 and (rricpos, crown ; in allusion to the pappus.) 



1. A. Arkansanus, Gray. Diffuse, 1° high; leaves oblong-spatulate to 

 broadly lanceolate, the loAver often toothed or lobed ; rays white to purple, ^' 

 long; pappus mostly 4-5-lobed. — Plains of Kan. and southward. 



21. CH^TOPAPPA, DC. 



Heads several-flowered, radiate ; disk-flowers often sterile. Involucral bracts 

 imbricated in 2 or more rows, the outer shorter. Receptacle flat, naked. 

 Achenes fusiform or compressed ; pappus of 5 or fewer thin nerveless pale®^ 

 alternating with rough bristly awns, or these wanting. — Low southwestern 

 branching annuals, with narrow entire leaves and solitary terminal heads; ray 

 white or purple. (XatV??, a bristle, and ttottttos, pappus.) 



1. C. asteroides, DC. Slender, 2-10' high, pubescent; involucres nar- 

 row, 2" long; rays 5-12; achenes pubescent. — Dry grounds, Vernon Co., 

 Mo., and southward. 



22. BOLTONIA, L'Her. 



Heads many-flowored, radiate; the rays numerous, pistillate. Scales of the 

 hemispherical involucre imbricated somewhat in 2 rows, appressed, with nar- 

 row membranaceous margins. Receptacle conical or hemispherical, naked- 

 Achenes very flat, obovate or inversely heart-shaped, margined with a callous 



