378 PROCEEDINGS OF THE AMERICAN ACADEMY. 
SYNOPSIS OF SPECIES. 
* Petiole-bases connate into conspicuous foliaceous pada. SCD ee 
tuberous-rooted perennials, at least the first spec 
+ Involucral scales subequal; heads solitary, PU A terminating 
the branches. 
1. S. catva (Gray & Engelm.) Gray. Erect, much branched, 
from a thick woody tuberlike root, harsh with white bristle-like hairs 
with swollen bases intermixed with a fine puberulence, the stem and 
branches striate-grooved; leaves opposite usually to tips of the 
branches, very harsh with a double pubescence like that of. stem, 
lance-deltoid in outline, acute at apex, somewhat cordate at base, 
crenate-dentate, unlobed or hastately eared or deeply trilobed, 3-5 
em. long, 1.5—4 cm. wide, on short margined petioles 7-12 mm. long, 
their bases united into broad entire or lobed foliaceous disks; heads 
solitary on long naked peduncles terminating the branches, the disk 
1-2.2 em. wide; involucre 7-9 mm. high, the scales linear-lanceolate 
to linear-oblong, in about 3 rows, subequal or the outer series slightly 
shorter, densely hispid and covered with a fine puberulence, somewhat 
green-nerved; rays 20-30, yellow, somewhat livid without, oval, 
8 mm. long, pubescent on tube and nerves of back; disk-corollas- 
yellow, becoming purplish upwardly, puberulent, 6.5 mm. long, the 
tube very short; pales 8 mm. long, puberulent on back and sub- 
herbaceous tip; achene glabrous, emarginate, awnless, mottled with 
black and gray, 4.5 mm. long, 2.5 mm. broad. 
Barrattia calva Gray & Engelm. Am. Journ. Sci. ser. 2. iii. 275 
(1847). 
Simsia calva Gray, Pl. Lindh. ii. 228 (1850). 
Encelia (Barrattia) calva Gray, Proc. Am. Acad. viii. 658 (1873). 
Specimens examined: Texas: rocky bluffs, Baird, Apr. 1882, 
Reverchon (N); rocky terraces of limestone hills, under stunted live 
oaks, Comanche Spring, June 1849, Lindheimer 60 (G); Comanche 
Spring, June 1849, Lindheimer 900 (FGN); Brazos, Sutton Hayes 
47 part (F); dry hills, local, Austin, 22 et 1891, J. E. Bodin 192 (N); 
rocky soil, in open woods between the headwaters of the Guadalupe 
and Pedernales Rivers, Oct. 1845, Lindheimer 432 (G, TYPE); top of 
dry hills, Pedernales, 1847, Lindheimer 39 (G); summit of rocky hills, 
Upper Guadalupe, 1846, Lindheimer 142 (G) [?= Lindheimer U1 433: 
GN]; San Antonio, 28 July 1882, Letterman 5 (N); common in 
woods, San Antonio, 18 Sept. 1901, Bush 837 (N); Spring Creek, 
Gillespie Co., G. Jermy (F); Kerrville, alt. 487-610 m., June 1894, 
