COMPOsiTJE. (composite family.) 281 



* Heads narrow, small, c/jmosely paniculate ; rai/s feiv, pistillate, usuallj fertile; 



involucre erect. 



1. V. oecidentalis, Walt. Stem tall, 4-wiiigecl ; leaccs opposite, ovate 

 to obloiig-lauceolate, triple-uervecl, serrate, pointed at both ends, often pubes- 

 cent beneath (large and thin) ; lieads in compound corymbs ; receptacle fiat- 

 t'lish ; Jloivers i/elloic ; rays 1-5, lanceolate; achenes wingless. (\^. Sieges- 

 beckia, Mirhx.) — Kich soil, S. Penn. to 111., and southward. July. 



'2. V. Virginica, L. Stem narrowly or interruptedly winged, downy- 

 pubescent, like the lower surface of the ovate-lanceolate feather-veined alternate 

 leaves; heads in compound corymbs ; receptacle convex ; y7o»-ers ivhite ; ravs 

 3-4, oval ; achenes winged. — Dry soil, Penn. ( ?) to 111., and southward. Aug. 



* * Heads broader, solitary or few. 



3. V. helianthoides, Michx. Perennial; stem hairy (1 -.3° high), 

 widely winged by the ovate to the ovate-lanceolate sessile alternate leaves, 

 which are rougli above and soft-hairy beneath ; involucre appressed ; rays 

 8-1.5, pistillate or neutral, usually sterile; achenes winged, tipped with 2 

 fragile awns. (Actin(jmeris helianthoides, Nutt.) — Prairies and copses, Oliio 

 to Iowa and sftutliward. July. 



4. V. encelioides, Benth. & Hook. Annual, branching, 1 - 2° high, cine- 

 reous ; leaves alternate, ovate or cordate to deltoid-lanceolate, the petioles 

 mostly winged and auriculate at base ; involucral scales linear, equal, folia- 

 ceous, spreading ; rays numerous, fertile. — Kan. to Tex., and westward. 



54. ACTINOMERIS, Nutt. 



Heads many-flowered ; rays neutral, few or none. Involucral scales few, 

 herbaceous, nearly equal, soon deflexed beneath the globular disk. Recep- 

 tacle small, chaffy. Achenes flat, obovate, winged or wingless, at maturity 

 spreading in all directions ; pappus of 2 or 3 smooth persistent awns. — Tall 

 branching perennials, with serrate feather-veined leaves, tapering to the base 

 and mostly decurrent on the stem. Heads corymbed ; flowers chiefly yellow. 

 (Name from aKris, a ray, and fiepls, a part ; alluding to the irregularity of the 

 rays.) 



1- A. squarrosa, Xntt. Stem somewhat hairy, usually winged above 

 (4-8*^ high); leaves alternate or the lower opposite, oblong or ovate-lanceo- 

 late, pointed at both ends; rays 2-8, irregular. — Kich soil, Penn. and W. 

 Xew York to Iowa, and southward. Sept. 



55. COREOPSIS, L. Tickseed. 



Heads many-flowered, radiate ; rays mostly 8, neutral, rarely wanting. In- 

 volucre double ; each of about 8 scales, the outer rather f(diaeeous and some- 

 what spreading; the inner broader and appressed, nearly membranaceous. 

 Receptacle flat, with membranaceous chaff deciduous with the fruit. Achenes 

 flat, obcompressed (i. e., parallel with the scales of the involucre), often winged, 

 not narrowed at the top, 2-toothed or 2-aAvned, or sometimes naked at the sum- 

 mit, the awns not barbed downwardly. — Herbs, generally with opposite leaves 

 and yellow or party-colored, rarely purple, rays. (Name from K',pis,a bug, and 

 ^iLis, resemblance ; from the form of the achene.) 



