LOASACEAE. 235 



Leaves sinuately dentate or crenate ; the lower oblanceolate-spatu- 



late ; the upper ovate-lanceolate. 5. T. integra. 



Leaves mostly pinnately lobed ; lobes of the leaves narrow, linear 



or lanceolate. 6. T. densa. 



Tall, usually 4 dm. or more high ; leaves often i dm. long. 



Leaves divided to near the base into linear-oblong or lanceolate 



narrow lobes. 7. T. laciniata. 



Leaves sinuate or lobed half-way to the midrib or less ; lobes triangu- 

 lar or ovate or broader. 

 Plant erect ; leaves tapering at the base, acutely lobed. 



8. T. speciosa. 

 Plant ascending or decumbent ; leaves sinuately round-lobed, at 



least the upper cuneate or rounded at the base. 



9. T. sinuata. 

 Petals straw-color. 



Outer filaments dilated ; petals 2-3 cm. long. 



Petals about 2 cm. long ; upper leaves with broad bases, long-acuminate. 



10. T. Rusbyi. 

 Petals about 3 cm. long ; none of the leaves broad at the base. 



Plant branched below ; flowers subtended by single entire bracts. 



11. T. nuda. 

 Plants simple below ; flowers subtended by several toothed bracts. 



12. T. stricta. 

 Filaments all filiform; petals 4-5 cm. long. 13. T. decapetala. 



1. Touterea multicaulis Osterhout. On plains of Colo. Wolcott, Eagle Co. 



2. Touterea multiflora (Nutt.) Rydb. (Mentzelia multiflora A. Gray) On 

 dry plains from Colo, to Tex. and Ariz. ; also Mex. Alt. 7000-9000 ft. 

 Salida ; Platte Canon ; Pine Grove ; Artist Glen ; Palmer Lake ; Grayback 

 mining camp and Placer Gulch. 



3. Touterea lutea (Greene) Rydb. (Mentzelia lutea Greene) In dry soil 

 in Colo. Canon City. 



4. Touterea chrysantha (Engelm.) Rydb. (M. chrysantha Engelm.) On 

 hills, mesas and canons from Colo, and Utah to Ariz. Canon City. 



5. Touterea integra (Jones) Rydb. (Mentzelia multiflora integra Jones) 

 In arid soil of southern Utah and southwestern Colo. Mesa across Gunni- 

 son from Grand Junction. 



6. Touterea densa (Greene) Rydb. (M. densa Greene) In gulches and 

 canons and on dry table-land of Colo, and N. M. Alt. 7000-9000 ft. Canon 

 City; Salida; Gunnison; gulch west of Palmer Lake; Smith's Fork Canon, 

 Delta Co.; Hotchkiss. 



7. Touterea laciniata Rydb. On plains and in canons of Colo. Alt. 5000- 

 7000 ft. Durango; Pagosa Springs; Canon City; Antonito. 



8. Touterea speciosa Osterh. (Mentzelia speciosa Osterh.) On hills and 

 in dry valleys from Wyo. to Colo. Alt. 5000-10,000 ft. Estes Park, Larimer 

 Co. ; west of Loveland, Larimer Co. ; Veta Pass ; Idaho Springs ; near 

 Boulder ; near Badito, between La Veta and Gardner ; Turkey Creek and 

 tributaries ; Ute Pass ; Dillon Canon ; Livermore ; Arthur's Rock ; Dixon 

 Canon ; between Sunshine and Ward ; Ft. Collins. 



9. Touterea sinuata Rydb. In canons of Colorado. Boulder. 



10. Touterea Rusbyi (Wooton) Rydb. (Mentzelia Rusbyi Wooton) On 

 plains and in valleys from Wyo. to N. M. and Ariz. Alt. 5000-7000 ft. 

 Wolcott ; Glenwood Springs ; Durango ; Black Canon ; between Porter and 

 Durango; Salida Canon. 



