09Q COMPOSIT.E. Brachyadis. 



22. BRACHYACTIS, Ledeb. 



Head luany-tloweved, heteroganious ; the rays very numerous and occuj)ying 

 more than one series, Icrtile : ligules small ami very slender or almost wanting. 

 Involucre loosoly imbricated in few series of herbaceous scales, or the innermost 

 somewhat scarious. lieceptaclo Hat, naked. Style-appendages lanceolate. Akeues 

 more or less compressed. Pappus simple, of copious fine and soft capillary bristles. 



Ours are annual and nearly glabrous herbs, with narrow and entire somewhat 



succulent alternate leaves, minutely ciliate towards their base, and paniculate or 

 racemose heads; the rays when developed purple or rose-color. — Benth. in Hook. 

 Ic. PI. t. HOG, & Gen. PI. ii. 271) ; Uray, Proc. Am. Acad. viii. 647. 



1. B. frondosa, CJray, 1. c A span to a foot or so high, sometimes spreading 

 on the gnniud, suim!tiiiu;.s u[)rif^hl : leavtis sputulate-linear, about an inch long, the 

 uppermost passing into tlic rallicr broad and obtiitsu herbaceous scales of the invo- 

 lucre : heads hemisi)heiical, i lines long : rays with exserted lignle when well 

 developed a line long, linear, nuich longer than its style : akenes narrow, appressed- 

 pubescent. — B. ciliata, var. carnosula, Benth. 1. c. Tripolium frundosum, Nutt. 

 Aster frondosiis, 'Von: & Gray. A. anyustus, Gray, PI. Wright., &c. ; Eaton, Bot. 

 King Exp. 144. 



Borders of boiling siiriiig, Souoia I'ass, in the Sierra Nevada, Bolander ; thence to N. Nevada, 

 S. Idaho, and New Mexico. 



B. CILIATA, Ledeb., found east of the Rocky Mountains and far north, also in Siberia, has 

 naiTow linear leaves, linear and acute scales of the involucre, and ligule a mere rudiment, much 

 shorter than the pujipus and the style. It is Tripolium angustum, Lindl., and Aster amjuat us, 

 Torr. & Ciray, &.o. 



23. ERIQERON, Linn. Fi.kabane. 

 Heads many-llowereil, heterogamous ; the rays fertile, very numerous and com- 

 monly occupying more than one series (in one or two species occasionally wanting) ; 

 the li<mles narrow, commonly elongated, in the last section very short and incon- 

 spicuous. Involucre hemispherical or sometimes campanulate, of numerous and 

 narrow rather firm and not foliaceous nor green-tipped scales, whicli are little imbri- 

 cated and hardly unequal. Beceptacle flat, rarely convex, naked. Corolla of the 

 disk-flowers narrow, 5-toothed, sonretimes 4 toothed. Style-appendages mostly short 

 and broad, obtuse. Akenes small, flat, and with only marginal ribs, rarely 1 - 2- 

 nerved on the face (especially in the ray-flowers). Pappus rather scanty, i. e. of a 

 single series of capillary rather fragile bristles, with or most comiiundy without an 

 external series of short bristles, these occasionally united into a crown or ring. — 

 Herbs, with alternate leaves, and heads terminating the stem or branches ; the rays 

 violet-purple or white ; the disk yellow, often changing to purplish. 



A largo goiuiH, widely disporsod over the world, 08|iecially the northern henuHpliero, imesiug on 

 the ono hand into Aslc.r, fruni wliicli It is <;hio(ly disthiguishod by u HiiiiyiliT invohicro and more 

 Hcanty and fragile uappus, and by more uuniorous and narrower rays ; w'liilo on Iho other Imnd a 

 jieculiar section, with «hoit and often minute rays, passes into Conyza. 



§ 1. Perennial {or No. 12 perhaps biennial). 

 * Rays inconspicuous, hut exserted, short, filiform, extremely numerous : heads some- 

 what racemed, small : jxippus simple. 



1. E. armerieefolium, Tuiv.z. S])arsely more or less hirsute with spreading 

 bristly hairs : stems f-lusteretl un the small rootstock, a span to a foot high, leafy : 



