Verbesina. composite. 359 



* * Leaves alternate : flowers of the disk and ray white. 



2. V. Virginica (Linn.) : stem narrowly or interruptedly winged, tomen- 

 tose-pubescent at the summit; leaves lanceolate or ovate-lanceolate, serrate 

 (often obscurely), feather-veined, scabrous above, pubescent or tonientose be- 

 neath, acute or acuminate at each end, tlie lower ones decurrent ; heads in 

 compound cymose corymbs, crowded ; rays 3-4, oval ; achenia minutely 

 hairy, narrowly and often unequally winged, crowned with 2 scabrous seti- 

 form awns. — Linn..' spec. 2. p. 901 (pi. Gronov.!); Walt.! Car. p. 213; 

 Michx.! fl. 2. p. 134; Pursh, I. c. ; Ell. sTc. 2. p. 410; BC! I. c. V. 

 paniculata, Poir. diet. 8. p. 456. 



p. stem and lower surface of the{^aves more tomentose ; achenia some- 

 times wingless. — V. villosa, Nutt. ! in trans. Amer. phil. soc. (n. ser.) 7. p. 

 370. 



Woods and dry soil, Pennsylvania (Michaux) and Virginia ! to Florida ! 

 and Louisiana ! p. Kentucky ! to Arkansas ! and Louisiana ! Aug.-Sept. 

 — Stem 3-6 feet high. Involucre very pubescent. Rays very short : the 

 tube hairy, as also the (about 15) disk-flowers. — The wings of the achenia 

 are variable, even in the same individual, as in Actinomeris ; and are some- 

 times nearly absent in the smoothish as well as the most tomentose forms. 



3. V. sinuata (Ell.) : stem striate, pubescent, naked, or sometimes winged 

 near the base; leaves irregularly sinuate-lobed or laciniate-pinnatifid, sca- 

 brous above, tomentose-pubescent beneath, the lower ones tapering into a 

 long and narrow base or winged petiole ; the lobes denticulate or serrate ; 

 heads in a compound corymb ; rays 3-5, oval ; achenia minutely hairy, 2- 

 awned, narrowly winged. — Ell. ! sk. 2. p. 411 ; DC. prodr. b. p. 615. V. 

 laciniata, Nutt. ! gen. 2. p>- 170. Siegesbeckia laciniata, Poir. diet. 7. p. 

 158.? 



Sandy soil, from the sea-coast of S. Carolina ! to Florida, Dr. Burrows ! 

 Dr. Leavenivorth ! Sept.-Nov. — Stem 4-6 feet high. Leaves mostly acute 

 or acuininate,* variously sinuate-pinnatifid ; the uppermost and lowest fre- 

 quently spatulate-ovate and undivided, according to Elliott. Heads, flowers 

 &;c., nearly as in V. Virginica ; of which perhaps it is only a variety. 



V. laciniata (Walt.), is said to have 3-9 yellow 2-3-tootlied sterile rays, 3-awned 

 achenia, and sinuate-laciniate leaves. 



110. XIMENESIA. Cav. ic. 2. p. 60, t. 178; DC. prodr. 5. p. 627. 



Heads many-flowered ; the ray-flowers ligulate, in a single series. Scales 

 of the involucre somewhat in 2 series, narrow, acute, foliaceous, spreading. 

 Receptacle convex; the chafT lanceolate, membranaceous, embracing the 

 flowers. Tube of the corolla hispid. Branches of the style in the disk- 

 flowers appendiculate. Achenia of the disk flat (compressed laterally), 

 winged, somewhat hairy, deeply emarginate at the summit, with 2 setiform 

 awns more or less united with the wing ; those of the ray mostly dissimi- 

 lar and wingless. — Annual (chiefly Mexican) somewhat canescent herbs. 

 Leaves opposite or alternate, mostly tapering into a winged petiole, which is 

 dilated and auriculate at the base, cordate-ovate or oblong, serrate-toothed. 

 Heads solitary, or loosely and irregularly corymbose. Flowers yellow. 



1. X. encelioides (Cav. 1. c.) : achenia of the disk slightly villous, sur- 

 rounded with the wing, emarginate at the summit ; of the deeply 3-toothed 



