BORAGINACEAE. 293 



Corolla bright yellow or orange, 12 mm. or more long; crest of the tube 

 prominent. 

 Floral leaves of the later flowers small, shorter than the flowers ; limb of the 



corolla 6-8 mm. wide. 3. L. miiltiflorum. 



Floral leaves of the later flowers not reduced ; limb of the corolla 8-20 mm. 

 wide. 

 Hispid pubescent ; corolla-tube bearded at the base within. 



4. L. Gmelini. 

 Canescent ; corolla-tube not bearded at the base within. 



5. L. canescens. 

 Corolla-lobes fimbriate or dentate ; later flowers cleistogamous. 



Corolla 2.5-3 (rarely only 2) cm. long; lobes distinctly fimbriate. 



6. L. linearifolium. 

 Corolla 2 cm. or less long ; lobes dentate. 



Corolla 15-20 mm. long; limb 8-20 mm. wide. 7. L. mandanense. 



Corolla 10 mm. or less long; limb 6-8 mm. wide. 8. L. hreviUorum. 



1. Lithospermum Torreyi Nutt. On hills and in cations from Mont, and 

 Ida. to Colo, and Utah. — Alt. 8000-8600 ft. — Poverty Ridge, near Cimarron ; 

 below Parrott Post Office ; Steamboat Springs. 



2. Lithospermum pilosum Nutt. On hills from Alb. and B. C. to Colo, and 

 Nev. — Leroux Creek, Delta Co. ; Minturn ; Denver. 



3. Lithospermum multiflorum Torn On hills and mountain sides and in 

 caiions from Wyo. to N. M. and Ariz.; also in Mex. — Alt. 7000-10,000 ft. — 

 Thompson's Park, La Plata Mountains; Crystal Park; Colorado Springs; 

 Estes Park, Larimer Co. ; Grayback mining camps and Placer Gulch ; mouth 

 of Cheyenne Canon ; North Cheyenne Cafion ; Artist's Glen ; Como, South 

 Park; Cafion City; southeast of Ouray; Piedra; above Mancos ; Pike's Peak; 

 headwaters of Clear Creek; Horsetooth Gulch; Table Rock; Northwest of 

 Soldier Cafion; Hotchkiss; Rist Cation; Seven Lakes; Empire. 



4. Lithospermum Gmelini (Michx.) Hitchc. (L. hirtum Lehm.) In sandy 

 places and dry plains from N. Y. and Mont, to Fla. and N. M. — Denver 

 {Eastwood). 



5. Lithospermum canescens (Michx.) Lehm. On plains and in open 

 woods from Ont. and N. D. to Ala., Tex. and Colo. — Alt. 4000-6000 ft.— 

 Boulder. 



6. Lithospermum linearifolium Goldie. (L. angustifolium Michx.) On 

 prairies and plains from 111., Man. and B. C. to Tex. and Ariz. — Alt. 4000- 

 7000 ft. — Mt. Harvard; Colorado Springs; river-bluffs, north of La Veta; 

 mesas near Pueblo ; Cucharas River below La Veta ; Trinidad ; plains near 

 Denver ; Ft. Collins ; Lamar ; Durango ; Spring Caiion ; Boulder. 



7. Lithospermum mandanense Spreng. On dry plains from N. D. and 

 Alb. to Tex. and Ariz.— Alt. 4000-5000 ft. — Larimer Co.; Colorado City. 



8. Lithospermum breviflorum Engelm. & A. Gray. (L. albescens Greene) 

 On dry plains from Ark. and Colo, to Tex. and N. M. ; also Mex.— Alt. 

 4000-6000 ft. — Arboles ; Boulder. 



II. ONOSMODIUM Michx. False Gromwell. 



I. Onosmodium occidentale Mackenzie. On plains and in sandy soil from 

 Man. and B. C. to Mo., Tex. and Utah.— Alt. 3500-5000 ft.— Along Platte 

 River, Denver; Ft. Collins; Boulder; Golden; Longmont. 



