COMPOSiT.*:. (coMPOsiTi: KAMir.v.) 253 



18. BRACHYCHJETA, Torr. & Gray. False Golden-rod. 



Heads ami llowers nearly as in Solidago, except the papjius, wliicli is a row 

 of minute rather scale-like bristles, shorter than the achene. — A p«!rennial herh, 

 with rounded or ovate serrate leaves, all the lower ones hiart-slmped ; the small 

 yellow heads in sessile dusters racemed or spiked on the branches. (Name 

 coinposeil of fipax^s, s/iort, and X"''''^> bristle, from the papi)us.) 



1. B. COrd^ta, Torr. & Gray. Wooded hills, S. Tnd. and E. Ky. to 

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



19. BELL IS, Tourn. Daisv. 



Heads many-flowereil, 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 pa])pus. — Low herbs (all but our 

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

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

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



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

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

 lower spatulate-obovatc ; 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, tlie outer sliorter. 

 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. {'Acpavris, inco)iS})icuous, 

 and aricpos, croicn ; in allusion to the pappus.) 



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

 broadly lanceolate, the hnver often toothed or lobed ; rays white to pur])le, Y 

 long; pappus mostly -l-S-lobed. — Plains of Kan. and southward. 



21. CH^TOPAPPA, DC. 



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

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

 Achenes fusiform or compressed ; pappus of 5 or fewer thin nerveless jjaleiv, 

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

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

 white or })ur]tle. (XaiTrj, a hrisile, and irdinros, pappus.) 



1. C. asteroides, DC. slender, 2- lO' high, pubescent; involucres nar- 

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

 Mo., and soutlnvard. 



22. BOLTONIA, L'Her. 



Heads many-flowered, 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 lieart shaped, margined with a callous 



