488 



COMPOSITAE. 



VOL. III. 



2. Phaethusa occidentalis (L.) Britton. Small Yellow Crownbeard. Fig. 4489. 



Siegesbeckia occidentalis L. Sp. PI. 900. 1753. 

 Verbesina occidentalis Walt. Fl. Car. 213. 1788. 

 Phaethusa americana Gaertn. Fr. & Sem. 2 : 425. 1791. 

 V. Siegesbeckia Michx. Fl. Bor. Am. 2: 134. 1803. 



Perennial; stem glabrous, or puberulent above, 

 usually much branched, narrowly 4-winged, 3-7 

 high, the branches also winged and pubescent. 

 Leaves thin, ovate, or the upper oblong, opposite, 

 minutely rough-pubescent on both sides, or gla- 

 brate, acuminate at the apex, narrowed or con- 

 tracted below into slender margined or naked 

 petiole, serrate, 4'-io' long, i'-3$' wide; heads 

 numerous, 6"-i2" broad, corymbose at the ends 

 of the stem and branches; involucre oblong-cam- 

 panulate, 2"-3" broad, its bracts lanceolate, ob- 

 tuse, erect, or the tips slightly spreading, pubes- 

 cent; rays 1-5, yellow, usually pistillate, rarely 

 none; achenes wingless; pappus of 2 slender, at 

 length divergent awns. 



In dry thickets and on hillsides, Maryland and southern Pennsylvania to Illinois, Florida, 

 Alabama and Texas. Aug.-Oct. 



3. Phaethusa helianthoides (Michx.) Britton. 

 Sunflower Crownbeard. Fig. 4490. 



Verbesina helian hoides Michx. Fl. Bor. Am. 2: 135. 



1803. 

 Actinomeris helianthoides Nutt. Gen. 2: 181. 1818. 



Perennial; stem hispid or hirsute, 4-winged, usu- 

 ally simple. 2-4 high. Leaves ovate or oval, ses- 

 sile, acute, acuminate or obtuse at the apex, nar- 

 rowed at the base, serrate or serrulate, rough or 

 appressed-hispid above, densely pubescent or canes- 

 cent beneath, 2'-4' long, i'-i4' wide, all alternate, 

 or the lower opposite; heads solitary or few, 2'-3' 

 broad; involucre hemispheric, about \' high, its 

 bracts lanceolate, acutish, canescent, appressed ; rays 

 8-15, pistillate or neutral, linear-oblong, yellow; 

 achenes scabrous or pubescent, broadly winged; 

 pappus of 2 subulate awns. 



On dry prairies and in thickets, Ohio to Georgia, west 

 to Iowa, Missouri and Texas. June-July. 



69. XIMENESIA Cav. Icones 2 : 60. 1793. 



Pubescent caulescent herbs, with alternate or sometimes opposite, simple, toothed or 

 somewhat laciniate leaves, and solitary or few, radiate, showy, peduncled heads. Involucre 

 rather flat, of narrow spreading bracts. Receptacle convex, chaffy. Ray-flowers pistillate, 

 fertile, numerous, the rays yellow. Disk-flowers numerous, perfect, fertile. Anthers some- 

 what sagittate at the base. Style-branches with slender pubescent appendages. Achenes 

 flat, winged. Pappus of short and straight awns. [In honor of Joseph Ximenes, a Spanish 

 apothecary and botanist.] 



About 4 species, natives of America, the following typical. 



