232 
«+ + Root annual (or biennial): leaves broader, at least some of them decurrent on stem and 
branches: rays occasionally parti-colored with brownish red: scales of pappus 
obtuse or at least pointless. 
+ Disk and receptacle elongated in fruit. 
2. H. quadridentatum Labill. Loosely paniculate: lower leaves incisely pin- 
natifid; upper lanceolate and entire: disk becoming 12 mm. long, surpassing the 
rays: disk-corollas mostly 4-toothed: pappus of very short roundish-oval scales.— 
Low ground, near the coast, extending from the Gulf States. 
a+ ++ Disk globular. 
3. H. elegans DC. Strict, slender: leaves narrowly lanceolate and entire (or low- 
ermost broader and sometimes slightly toothed): heads 4 to 6mm. high, with brown- 
ish or purplish disk, equaled or surpassed by the pure yellow or parti-colored or 
largely brownish-purple rays: pappus minute, the roundish-ovate scales decidedly 
shorter than the breadth of the achene. (H. mierocephalum var. bicolor Torr. & Gray 
F].).—Moist ground, from Louisiana to western Texas. 
4, H. microcephalum DC. Freely branching: leaves lanceolate or oblong, the 
lower denticulate or repand-toothed: heads 6 te 8mm. high, with yellow or fuscous 
disk much surpassing or sometimes equaled by the rays: pappus scales ovate, short, 
but nearly half the length of the achene.—Most ground, southern Texas and adja- 
cent Mexico, 
5. H. amphibolum Gray. Stouter, freely branching: upper leaves lanceolate to 
linear and entire; lower varying to oblong and toothed or laciniate-pinnatifid: heads 
6to 8 mm.in diameter, with fuscous-purplish disk equaled or surpassed by the 
yellow rays: pappus scales roundish and very small (as in no. 3).—Southern borders 
of Texas, on or near the Rio Grande. 
6. H. ooclinium Gray. Ratherstout, freely branching: leaves lanceolate, usually 
more or less dentate or denticulate: heads 10 to 12 (rarely 8) mm, high, with yellow- 
ish and fuscous disk longer than the yellow rays: pappus scales rather large, ovate, 
obtuse, often almost as long as the achene.—Southern borders of Texas, along the 
Rio Grande. 
+ + + Root perennial: leaves lanceolate to oblong : scales of pappus aristate-acuminate. 
7. H. nudiflorum Nutt. Somewhat puberulent, 3 to9 dm. high: leaves narrowly 
lanceolate or oblong to linear, entire, or the radical spatulate and dentate: heads 
mostly small: disk brownish: ray yellow or partly brown-purple, sterile, shorter 
than or exceeding the disk.—Low ground, extending into Texas from the Gulf and 
Mississippi States. 
8. H. autumnale L. Nearly smooth, 3 to 18 dm. high: leaves mostly toothed, 
lanceolate to ovate-oblong: heads larger, about 12 mm. broad: disk yellow: ray 
fertile, yellow.—Wet ground, throughout Texas. 
** Rays neutral, very numerous : scales of pappus dissected : leaves narrowly or not at all 
decurrent. 
9. H.fimbriatum Gray. Nearly glabrous: stem virgate, with somewhat elongated- 
lanceolate mostly entire stem-leaves, but no conspicuous radical tuft, continued into 
long solitary peduncle bearing a head with disk 16 to 18 mm. broad, equaled by the 
rays: scales of pappus broad, dissected from summit to beyond the middle into 
many capillary bristles. (Gaillardia fimbriata Michx. Fl. Leptopoda fimbriata Torr. 
& Gray. F].)—Extending from the pine barrens of the Gulf States into Texas. 
91. AMBLYOLEPIS DC. 
Annual, with entire leaves neither punctate nor decurrent, principal 
involucral bracts foliaceous and lanceolate, an inner thin-scarious se- 
