372 COMPOSITAE. Vo. III. 
13. HETEROTHECA Cass. Dict. Sci. Nat. 21: 130. 182t. 
Erect, hirsute or pubescent, branching herbs, with alternate, mostly dentate leaves, and 
rather large heads of both discoid and radiate yellow flowers, generally solitary at the ends 
of the branches. Involucre hemispheric or broadly campanulate, its bracts imbricated in 
several series, the outer shorter. Receptacle flat, alveolate. Ray-flowers pistillate. Disk- 
flowers perfect, or some of them only staminate. Style-branches flat, their appendages 
lanceolate or triangular. Achenes pubescent, obtuse, those of the ray-flowers thick, those 
of the disk-flowers flattened. Pappus of the ray-flowers obsolete or of a few caducous bristles, 
that of the disk-flowers of an inner row of numerous capillary rough bristles, and an outer 
row of shorter stouter bristles or scales. [Greek, different-case, from the dissimilar achenes.] 
Five or 6 species, natives of the southern United States and Mexico, the following typical. 
1. Heterotheca subaxillaris (Lam.) Britton & Rusby. Heterotheca. Fig. 4194. 
Inula subaxillaris Lam. Encycl. 3: 259. 1799. 
Heterotheca Lamarckii Cass. Dict. Sci. Nat. 21: 131. 
1821. 
Heterotheca subaxillaris Britton & Rusby, Trans. N. Y. 
Acad. Sci. 7: 10. 1887. 
Biennial or sometimes annual, 1°-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 margins; rays 10-25; inner 
bristles of the pappus of the disk-flowers about 2” 
long. 
In dry soil, Delaware to Florida, Louisiana, Kansas, 
erizoue and Mexico. In ballast, at Philadelphia. July- 
ept. 
14. CHRYSOPSIS [Nutt.] Ell. Bot. S. C. & Ga. 2: 333. 1824. 
[DirLocon Raf. Amer. Month. Mag. 2: 268. 1818. Not Poiret, 1811.] 
Perennial or biennial, rarely annual, 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. Involucre 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, pubescent. Style-branches narrow, 
somewhat flattened, their appendages linear or subulate. [Greek, of golden aspect.} 
About 20 species, natives of North America and Mexico, Besides the following, about 8 others 
occur in the southern and western United States. Type species: Chrysopsis gossypina (Michx.) Ell. 
Leaves elongated-linear, entire, parallel-veined ; achenes linear; involucre campanulate. 
Plants 1°-3° high, silvery-pubescent ; leaves grass-like, 3’-12’ long. 1. C. graminifolia. 
Plants 4’-10’ high, woolly-pubescent ; leaves rigid, 1’—4’ long. 2. C. falcata. : 
Leaves oblong, lanceolate, or linear, pinnately veined; achenes obovate, or oval; involucre hemi- 
spheric. : f . 
Plant densely woolly-pubescent. 3. G. gossypina. 
Plants hirsute, or villous-pubescent. ‘ 
Heads numerous, corymbose-paniculate ; pubescence of long deciduous hairs; eastern species. 
. C. mariana, | 
Heads fewer, corymbose, or terminating the branches ; pubescence persistent ; western species. 
Villous-pubescent, hirsute or hispid; perennials. 
Villous-pubescent and canescent with appressed hairs. 5. C. villosa. 
Hirsute or hispid-pubescent. 
Leaves linear, acutish. 6. C. stenophylla. 
Leaves mostly spatulate, obtuse. 7. C. hispida. 
Pilose-pubescent with soft spreading hairs; annual. 8. C. pilosa, 
