Contributions to Western Botany. 37 
annulata and obliquely clavate and narrowed at the tip in B. 
. gibbosa; slender and widely spreading herbs with ‘small flowers; 
plants all of the Larrea Zone. The species of this genus are 
merely tentative as the characters are too variable. 
A. Flowers small, interruptedly spicate and sessile; annuals 
with viscid stems (at least above), rather Stout; Strict 
peduncles paniculate; leaves undulate on the margins’ 
Slender petioled; fruit copay dschsaaes rounded, about 4- 
angled, smooth. 
1. B. Wrightii Gray Am. Jour. Sci. 2 15 322, Leaves 
small, oblong-obovate to lanceolate, undulate, black dotted, white 
below; bractlets minute, purplish, fimbriate-ciliate, deciduous, 3 
to each flower; flowers white; stamens 2; fruit 1-2” long, rough- 
ened, acutely 4-angled and wrinkled; erect plants. ATS and 
Texas. 
2. B. bracteosa Wats. Proc. A. A. 20 370. Giapdaias 
hirsute throughout, except the Ieaves; leaves ovate to lanceolate, 
rounded at base; bractlets coaspicuous, pink, acuminate into» a 
thread-like tip nearly as long as the flower, persistent after the 
flower has fallen. Arizona and Texas. Said to be the same as 
B. Wrightii, but appears different. 
2A. Flowers racemose. 
3. B. gibbosa Pavon, Gray Am. Jour. Sci. 2 15 323, B. 
gypsophiloides (M. & G.) Coult. Fl. Tex. 354. A shrubby-based 
perennial with gray stems; leaves mostly: lanceolate to linear, 
sometimes ovate, acute, 1-2’ long; flowers: ¥ety conspicuous, red, 
in long racemes; stamens long-exserted; fruitsgibbous and clavate, 
reflexed, many ribbed, about 4” long. Arizona to Texas. 
4. B. Coulteri: Wats. (Hook.) Proc. A. A. 24 70. .Glutinous 
only in the middle of the internodes; racemes, in- fruit, about 1’. 
long and panicled; stamens 3, included; flowers 1” long; bracts 
very small, single; frnit clavate, about 14” long, truncate, angles 
acute, channels reach the apex and-are rugulose: oni the: side; 
