114 BOTANT. 



filaments 15-30, subulate-filiform or occasionally somewhat dilated ; capsules 

 cylindric, narrow, elongated ; seeds 20-40. — From Sonora and New Mexico 

 to California, Utah and Colorado. Frequent in Nevada from the Washoe to 

 the East Humboldt Mountains, and also found on Carrington Island, Salt 

 Lake; 4,200-8,000 feet altitude; May-July. (428.) 



Var. GEACILENTA. {M. grocUenta, T. & Gr.) 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 Hnearr 

 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. INTEGEIFOLIA. Usually branched ; leaves ovate, oblong or oblong- 

 lanceolate, entire or sinuately toothed or pinnatifid ; flowers and fruit as in the 

 ordinary M. alhicaulis, 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 Vasey. 

 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 rnembranous, 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. & Gr. 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 sepa,ls; stamens very many, the 

 5 outer filaments dilated ; seeds numerous, winged. — Mature capsule I'-l^' 



