114 
BOTANY. 
filaments 15-30, subulate-filiform or occasionally somewhat dilated ; capsules 
cjlindric, narrow, elongated ; seeds 20-40. — From Sonora and New Mexico 
to Califi)rnia, Utali and Colorado. Frequent in Nevada from the Washoe to 
the East Humboldt Mountains, and also fi)und on Carrington Island, Salt 
Lake ; 4,200-8,000 fi;et altitude ; May-July. (428.) 
Var. GRACILENTA. [M. grocUenta^ T. & G.) Flowers usually somewhat 
capitate, 2-3 times larger, petals 2-4" long, deep yellow with an orange base ; 
stems simple or branched, erect and strict ; leaves very variable, often linear- 
pinnatifid with numerous segments, or oblong- or ovate-lanceolate and more 
or less entire. — California and Southern Oregon, (Cronkhite.) It is 506 and 
575 Brewer, 165 Coulter, and M. Veatchiana, Kell. Frequent from the 
Washoe to the West Humboldt Mountains, Nevada ; 5,000 feet altitude ; 
May-July. (429.) 
Var. INTEGRIFOLIA. CJsually branched ; leaves ovate, oblong or oblong- 
lanceolate, entire or sinuately toothed or pinnatifid ; flowers and fruit as in the 
ordinary M. alhicauUs^ but the seeds rather few (6-20) and some of the 15-20 
filaments occasionally petaloid. — There seems very little to separate this from 
M. micrantha, H. & A., which has the same habit and foliage and is by no 
means constant in having a 3-seeded capsule, having sometimes half-a-dozen 
or more seeds. This is 663 Geyer, 571 Hall & Harbour, and 195 Yasey. 
East Humboldt Mountains, Nevada, and Antelope Island and the Wahsatch, 
Utah ; 4,500-6,000 feet altitude ; June, July. (430.) 
Mentzelia congesta, Nutt. Stem 6-10' high, branching, pubescent, 
white ; leaves short, the lower linear-lanceolate, entire or pinnatifid, the 
upper ones clasping ; bracts membranous, toothed, broadly ovate and em- 
bracing, the sessile clusters of (3-5) flowers ; petals 2" in length, yellow, 
orange at base, a little longer than the calyx ; stamens about 20 ; capsules 
clavate-oblong, 12-20-seeded. — Rare ; collected only by Nuttall in Southern 
Idaho. Found on the foot-hills of the Toyabe Mountains, east of Austin, 
Nevada; 6,000 feet altitude ; July. (431.) 
Mentzelia l^vicaulis, T. & G. Tall, 2-3° high, stout, branching; 
leaves lanceolate, sinuate-pinnatifid, sessile ; flowers large and showy, termi- 
nating the branches and often somewhat crowded ; bracteoles none, or few 
and subulate ; petals 5 or rarely 10, 2' long, yellow, erect-spreading, lanceolate, 
acute, longer than the lanceolate acuminate sepals ; stamens very many, the 
5 outer filaments dilated ; seeds numerous, winged. — Mature capsule 1'— 1 J' 
