BORAGINACEAE. 289 



6. CRYPTANTHE Lehm. 

 Nutlets not winged. 



Nutlets dissimilar, 3 of them tubercled, the fourth smooth or nearly so. 



Sepals in fruit strongly thickened on the back. i. C. crassisepala. 



Sepals in fruit not strongly thickened on the back. 



Plant 1-2 dm. high ; calyx in fruit 6-8 mm. long. 2. C. Kelseyana. 



Plant a few cm. high ; calyx in fruit less than 5 mm. long. 



3. C. minima. 

 Nutlets all smooth. 



Nutlets usually all four maturing. 



No open areola between the forks of the groove of the acute nutlets. 



4. C. Torreyana. 

 A distinct open areola between the forks of the groove of the lanceolate, 



acuminate nutlets. 

 Leaves spatulate or oblanceolate, or the upper sometimes linear. 



5. C. Pattersonii. 

 Leaves narrowly linear. 6. C. Fendleri. 



Only one nutlet maturing. 7. C. gracilis. 



Nutlets wing-margined. 8. C. pterocarya. 



1. Cryptanthe crassisepala (T. & G.) Greene. (Krynitzkia crassisepala 

 A. Gray) In loose soil, " prairie-dog towns " and waste places from Sask. 

 and Mont, to Tex. and Utah; also Mex.^-Alt. 4000-6000 ft. Walsenburg; 

 foot-hills west of Ft. Collins; Colorado Springs; Ft. Collins; Deer River; 

 Trinidad ; New Windsor, Weld Co. ; Ouray ; Boulder. 



2. Cryptanthe Kelseyana Greene. In dry and sandy soil from Ass. and 

 Mont, to Colo. Alt. about 6000 ft. Pike's Peak; Walsenburg. 



3. Cryptanthe minima Rydb. In river valleys of Colo. Alt. about 7000 ft. 

 Cucharas River above La Veta. 



4. Cryptanthe Torreyana (A. Gray) Greene. On hillsides from Ida. and 

 Wash, to Colo, and Calif. Idaho Springs. 



5. Cryptanthe Pattersonii (A. Gray) Greene. (Krynitzkia P alter soni A. 

 Gray) On hillsides in Wyo. and Colo. Alt. 6000-7000 ft. River-bluffs north 

 of La Veta; South Cheyenne Canon. 



6. Cryptanthe Fendleri (A. Gray) Greene. (Krynitzkia Fendleri A. Gray) 

 In river valleys and on sandy places, from Wyo. to N. M. and Ariz. Alt. 

 5000-8000 ft. Denver; Cheyenne Mountain; Antonito; Salida; Gunnison; 

 Colorado Springs; Palmer Lake. 



7. Cryptanthe gracilis Osterhout. In dry soil, in Colorado. Glenwood 

 Springs. 



8. Cryptanthe pterocarya (Torr.) Greene. (Eritrichium pterocaryum 

 Torr.) On plains and in dry places from Wash, to N. M. Palisades; 

 Grand Junction. 



7. ANCHUSA L. 



i. Anchusa officinalis L. Introduced from Europe in waste places. Ft. 

 Collins. 



8. MERTENSIA Roth. LUNGWORT. 



Filaments equalling or exceeding, and usually broader than the anthers. 

 Calyx-lobes rounded-ovate, shorter than the ample, campanulate tube. 



BRACHYLOBAE. 

 Calyx-lobes longer than the short tube. 



Calyx-lobes linear or oblong, obtuse. CILIATAE. 



Calyx-lobes triangular-lanceolate to linear-lanceolate, acute. 



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