322 



COMPOSITAE. 



[Vol. III. 



i. Heterotheca subaxillaris (Lam.) Britt. 

 & Rusby. Heterotheca. (Fig. 3651.) 



Inula subaxillaris Lain. Encycl. 3: 259. 1799. 

 Heterotheca Lamarckii Cass. Diet. Sci. Nat. 21: 131. 



1821. 

 Heterotheca subaxillaris Britt. & Rusb3% Trans. N. Y. 



Acad. Sci. 7: 10. 1887. 



Biennial or sometimes annual, i-3 high. Basal 

 and lower leaves petioled, ovate or oblong, 2 / ~3 / 

 long, the upper ones oblong, sessile or clasping, 

 smaller, all acutish or obtuse, dentate; heads 

 rather numerous, 6 // -9 // broad; involucre nearly 

 hemispheric, 3 // -5 // high, its bracts linear, or 

 slightly dilated above, the inner with scarious mar- 

 gins; rays 10-25; inner bristles of the pappus of the 

 disk-flowers about 2" long. 



In dry soil, Delaware to Florida, Louisiana, Kansas, 

 Arizona and Mexico. July-Sept. 



14. CHRYSOPSIS Nutt. Gen. 2: 150. 1818. 



[DiPLOGON Raf. Amer. Month. Mag. 2: 268. 1818. Not Poiret, 1811.] 

 Perennial branching herbs, with alternate sessile entire leaves, or the basal ones dentate, 

 and large many-flowered heads of both tubular and radiate yellow flowers (rays wanting in 

 some western species), loosely corymbose, or solitary at the ends of the branches. Invo- 

 lucre campanulate to hemispheric, its bracts narrow, imbricated in several series, the outer 

 shorter. Receptacle usually flat, more or less foveolate. Ray-flowers pistillate. Disk- 

 flowers mostly all perfect. Pappus double in both the disk and ray-flowers, the inner of 

 numerous rough capillary bristles, the outer of smaller or minute scales or bristles. Achenes 

 flattened, oblong-linear or obovate. Style-branches narrow, somewhat flattened, their ap- 

 pendages linear or subulate. [Greek, of golden aspect.] 



About 20 species, natives of North America and Mexico. Besides the following, about S others 

 occur in the southern and western United States. 

 Leaves elongated-linear, parallel-veined; achenes linear; involucre campanulate. 



3 high, silvery-pubescent; leaves grass-like, 3'-i2' long. i. C. graminifolia. 



C. fa lea la. 

 involucre heniis- 



C. pilosa. 



C. Mariana. 



4/-10' high, woolly-pubescent; leaves rigid, i'-4' long. 2 



Leaves oblong, lanceolate, or linear, pinnately veined; achenes obovate, or oval: 

 pheric. 

 Plant densely woolly-pubescent. 3 



Plants hirsute, or villous-pubescent. 



Heads numerous, corymbose-paniculate; eastern species. 4. 



Heads fewer, corymbose, or terminating the branches; western species. 

 Villous-pubescent; leaves oblanceolate, oblong, or lanceolate. 

 Leaves acute. 

 Leaves obtuse. 

 Hirsute-pubescent. 



Leaves linear, acutish, short. 

 Leaves spatulate, obtuse. 

 Pilose-pubescent; leaves oblong-lanceolate. 



5. C. camporum. 



6. C. villosa. 



7. C. stenophylla. 



8. C. hispida. 



9. C. Nuttallii. 



1. Chrysopsis graminifolia (Michx.) 



Nutt. Grass-leaved Golden Aster. 



(Fig. 3652.) 



Inula graminifolia Michx. Fl. Bor. Am. 2: 122. 



1803. 

 Chrysopsis graminifolia Nutt. Gen. 2: 151. 181S. 



Slender, corymbosely branched above, very 

 silvery-pubescent, i-3 high. Leaves linear, 

 soft, grass-like, 3-5-nerved, shining, the basal 

 ones df-xi' long, 2 // -5 // wide, the upper much 

 smaller, and the uppermost subulate and erect; 

 heads several or numerous, about Yz f broad, 

 solitary at the ends of the branches; involucre 

 campanulate, its bracts glabrate; achenes linear- 

 fusiform. 



In dry soil, Delaware to Florida, west to Ohio 

 (Cooper in Torrey Herbarium) and Texas. Called 

 also Silver-grass, Scurvy-grass. Aug-Oct. 



