2()'J PRIMULACEAE. 



Calyx-tube in fruit obpyramidal, its green teeth surpassing the capsule. 



Bracts of the involucre ovate or oblong. 2. A. occidentalis. 



Bracts of the involucre lanceolate or subulate. 



Calyx-teeth erect, lanceolate, usually shorter than the tube. 



Peduncles, pedicels and calyx-lobes densely puberulent, the latter ex- 

 ceeding the fruit. 3. A. ptiberulenta. 

 Peduncles and pedicels sparingly puberulent or glabrous ; calyx-lobes 

 glabrous or nearly so, not exceeding the fruit. 

 Corolla longer than the calyx. 



Peduncles 1-2 dm. high, many times longer than the strongly 



ascending or suberect pedicels. 4. A. pinetorum. 



Peduncles less than 3 cm. high, often equalled or exceeded in 

 length by the spreading pedicels. 5. A. subumbellata. 



Corolla shorter than the calyx. 6. A. diffusa. 



Calyx-teeth more or less spreading, ovate-triangular, foliaceous, equalling 

 or exceeding the whitish tube ; corolla shorter than the calyx. 



7. A. sublifera. 

 Calyx-tube in fruit hemispherical ; teeth broadly triangular. 



8. A. filiformis. 



1. Androsace carinata Torn. (A. Chamaejasne A. Gray; not Host.) On 

 alpine peaks from Alb. to Colo. — Alt. 9000-13,000 ft. — Mt. Evans; Pike's Peak; 

 near the summit of the Rocky Mountains ; Bottomless Pit ; West Spanish 

 Peak; Iron Mountain. 



2. Androsace occidentalis Nutt. In dry soil from Ills., Man. and Mont, to 

 Mo., Tex. and Calif. — Alt. 4000-8500 ft. — Mancos ; foot-hills, Larimer Co. ; 

 Los Pinos (Bayfield) ; Empire. 



3. Androsace puberulenta Rydb. On plains and hills from Man., Mackenzie 

 River and Alb. to N. Mex. — Alt. 5000-12,000 ft. — Plains near Boulder; 

 Pike's Peak ; Seven Lakes ; Wahatoya Cafion ; mountain near Veta Pass ; 

 headwaters of Sangre de Cristo Creek ; Gentian Ridge ; Veta Mountain ; 

 Ribbon Lake ; Marshall Pass ; Cucharas River, above La Veta ; Little Veta 

 Mountain; near Ironton, San Juan Co.; Mt. Hesperus; Bear Creek Divide, 

 west of Mt. Hesperus ; Iron Mountain ; Carson. 



4. Androsace pinetorum Greene. In the mountains from Mackenzie and 

 Yukon to Colo, and Ariz. Scarcely distinct from A. septentrionalis L. — 

 Alt. 5000-8000 ft. — Los Pinos (Bayfield); Graham's Park; hills southeast 

 of La Veta; Georgetown; Boulder; Soldier's Canon; Dolores. 



5. Androsace subumbellata (A. Nelson) Small. Along mountain streams 

 from Mont, to Colo, and Ariz. — Alt. 9000-12,000 ft. — Berthoud Pass, near 

 Georgetown ; Ironton Park, 9 miles south of Ouray ; Pike's Peak ; Gore Pass ; 

 source of Leroux, above Graymont ; Beaver Creek ; Cameron Pass ; Grizzly 

 Creek; Deep Creek. 



6. Androsace diffusa Small. In the mountains mostly along rivers from 

 Mackenzie and B. C. to N. M. and Ariz. — Alt. 6000-11,000 ft. — Massif de 

 I'Arapahoe ; Pike's Peak ; Upper La Plata River ; Veta Pass ; North Park 

 near Teller; along the Michigan; Van Boxle's ranch, above Cimarron; Silver 

 Plume; foot-hills, Larimer Co.; Mancos; Georgetown; Mt. Harvard; on 

 Turkey Creek and tributaries ; Glenwood Springs, Garfield Co. ; hills above 

 Mancos; Pennock's mountain ranch; vicinity of Como; Bosworth's ranch. 

 Stove Prairie; along Purgatory River, Trinidad; Rist Cafion; above Manitou; 

 gulch west of Pennock's ; Dolores. 



