54 BOTANICAL GAZETTE [JANUARY 
C. TuHurBERI Gray, DC. Prod. 14: 27; Pacif. R. Rep. 12:19; 
Chorizanthe Thurbert Wats., Proc. Am. Acad. 12: 269. 
The validity of the genus Centrostegia can hardly be questioned when one 
has both plants and descriptions at hand. The spurs on the involucre are so 
characteristic that the genus might well stand on these alone. 
_ Eriogonum revolutum, n. sp.— Perennial, the low woody base 
rather intricately branched, the upright branchlets 7-10™ long: 
leaves thick, linear, so strongly revolute as to be nearly terete, 
obtuse or acutish, 8-15™" long, softly pubescent above, more 
densely so below, short petioled, fascicled near the ends of the 
branchlets: peduncles 5-8 long, slender, pubescent, leafy at 
_the base only: involucres pubescent, short peduncled, in a com- 
pact head, turbinate, strongly 5-nerved and toothed, 10-20- 
flowered: bracts linear, scarcely exceeding the involucres; pedi- 
cels 4-5™™" long: calyx pubescent, pink, campanulate, slightly 
constricted in the middle, outer lobes oblong-oval, inner slightly 
narrower. 
This excellent species is apparently not closely related to any described 
species, but undoubtedly belongs in § 3 of Watson’s revision, Proc. Am. 
Acad, 1 
2: 262. 
Collected by the writer in the mountains south of Bunkerville, Nevada 
(no. 753). 
¥ Cerastium variabile, n. sp.—A perennial cespitose herb with 
many erect stems 15-25°™ long, viscid pubescent throughout: 
leaves subcoriaceous, exceedingly variable in shape and size; the 
lower ones oblong-clavate, obtuse, I-1.5° long; upper ones 
from narrowly oblong-linear to ovate-lanceolate, mostly acute, 
one-fourth to one-half the length of the internodes: sterile shoots 
very few, with internodes usually exceeding the oblong-linear 
acute leaves: flowers 5-12, in an elongated open cyme; the 
lower pedicels much elongated (often 25°™ long); upper ones 
considerably shorter, erect or recurved: the thick sepals narrowly 
oblong, acutish, 6-7™m long, narrowed abruptly into a thin scari- 
ous margin and tip: petals 1-2™™" longer than the calyx, nar- 
rowly obcordate except for being deeply two-cleft : capsule one 
and a half times as long as the calyx, distinctly curved. 
This very variable plant is most closely related to Dr. Greene’s C. occt- 
dentale, from which it is easily distinguished by its more compactly cespitose 
