GERANIACEAE. 219 



waters of Clear Creek; Colorado Springs; Idaho Springs; Manitou; Platte 

 Canon ; vicinity of Arthur's Rock ; near Boulder. 



6. Geranium Pattersonii Rydb. In the mountains of Colo. Alt. 8000-12,000 

 ft. Near Empire; Douglas Mountain, Empire; Gray's Peak; Ute Pass; North 

 Cheyenne Canon; Palmer Lake; near Narrows; Platte Canon; Eldora to 

 Baltimore. 



7. Geranium Fremontii A. Gray. In the mountains of Colo. Alt. up to 

 9000 ft. Sand Creek Pass. 



8. Geranium caespitosum James. On hills and in dry mountain valleys 

 from Wyo. and Colo. Alt. 5000-10,000. Grayback mining camps and Placer 

 Gulch ; foothills of Larimer Co. ; Turkey Creek and tributaries ; Sangre de 

 Cristo Creek ; Horsetooth Gulch ; Dixon Canon. 



9. Geranium atropurpureum Heller. On hills from Colo, to N. M. and 

 Ariz. Alt. 7000-8000 ft. Box Canon, west of Ouray; Arboles; Ouray; 

 Mancos ; Horsetooth Gulch ; Dixon Canon Creek ; Dolores. 



10. Geranium Bicknellii Britton. In waste places and on hillsides from 

 N. S. and B. C. to N. Y. and Colo. Alt. 4000-5000 ft. Fish Creek Falls. 



2. ERODIUM L. 



i. Erodium cicutarium L. In waste places from N. S. and Ore. to N. J., 

 Colo, and Calif.; also Mex. Introduced from Europe. Alt. 4000-7000 ft. 

 Cucharas River, -below La Veta ; South Cheyenne Canon ; Colorado Springs ; 

 Brantly Canon, Las Animas Co. ; Deer River ; Palisades ; Hotchkiss ; Ft. Col- 

 lins; Boulder. 



Family 73. LINACEAE Dumont. FLAX FAMILY. 

 i. LINUM L. FLAX. 



Petals blue ; sepals not glandular-ciliate. 



Annual. i. L. usitatissimum. 



Perennial. 2. L. Lewisii. 



Petals yellow ; sepals usually glandular-ciliate. 



Sepals long-acuminate-aristate; twice as long as the pod. 3. L. aristalum. 

 Sepals not more than half longer than the pod. 



Petals less than i cm. long : sepals merely keeled or slightly wing-crested. 

 Stem glabrous or slightly and minutely puberulent. 



Lateral veins of the sepals indistinct at least below ; petals 6-7 mm. long. 



4. L. australe. 

 Lateral veins of the sepals strong ; petals about 8 mm. long. 



5. L. rigidum. 

 Stem densely puberulent. 6. L. puberulum. 



Petals over i cm. long ; sepals strongly wing-crested. 7. L. arkansanum. 



1. Linum usitatissimum L. In waste places, escaped from cultivation; 

 native of Europe. Ft. Collins. 



2. Linum Lewisii Pursh. (L. perenne of Coult. Man.; not L.) On dry 

 plains and hills from Mackenzie and Yukon to Tex. and Calif. ; also Mex. 

 Alt. 5000-10,000 ft. Cimarron; mesas near Pueblo; Ft Collins; Los Pinos 

 (Bayfield) ; Mancos; West Mancos Canon; Veta Pass; New Windsor, Weld 

 Co. ; Palmer Lake ; north of La Porte ; Dixon Canon ; foot-hills, Larimer 

 Co.; Spring Canon; Hahn's Peak. 



