PRIMROSE FAMILY 649 



1. D. albertina Rydb. Cespitose perennial, but scarcely pulvinate; leaves 

 narrowly oblanceolate, about 1 cm. long, sparingly ciliate; scape 5-10 cm. long, 

 slender, sparingly hairy; bracts linear-lanceolate, 3-4 mm. long; calyx-lobes 

 elliptic, obtuse; corolla-lobes 2-3 mm. long. Androsace albertina Rydb. High 

 mountains: Alta. Mont. Subalp. Je-Au. 



2. D. carinata (Torr.) A. Nels. Densely tufted and pulvinate perennial; 

 leaves numerous, crowded, oblanceolate, 46 mm. long, acute, ciliate; scape 1-5 

 cm. high, white-hirsute; bracts oblong or linear, about 5 mm. long; calyx-lobes 

 oval or oblong, obtuse; corolla white or yellowish, with a yellow eye; lobes oval, 

 3-4 mm. long. A. Chamaejasne A. Gray, not Host. A. carinata Torr. Doug- 

 lasia Johnstoni A. Nels. High mountains: Colo. Utah Alta. Mont. Alp. 

 Je-Jl. 



4. ANDROSACE (Tourn.) L. 



Small scapose annuals. Leaves rosulate at the base of the stem. Flowers 

 umbellate, inconspicuous. Calyx campanulate or turbinate, persistent, 5-lobed 

 or 5-parted. Corolla salver-shaped, almost funnelform; tube shorter than the 

 calyx; throat constricted; lobes of the limb 5, imbricate in the bud. Stamens 5, 

 included, with short filaments. Style very short; stigma capitate. Capsule 

 short, 5-valved; seeds usually many. 



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

 Bracts of the involucre ovate or oblong. 



Calyx-teeth longer than the tube; leaves linear-oblanceolate, thin. 



1. A. arizonica. 



Calyx-teeth shorter than the tube; leaves spatulate or oblanceolate, thicker. 

 Scapes and pedicels several, diffuse or ascending. 2. A. ocQidentalis. 



Scape single, 1-4-flowered, erect; pedicels almost erect. 3. A. simplex* 

 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 exceeding 



the fruit. 4. A. puberulenta. 



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. 

 Calyx-lobes triangular, less than half as long as the calyx-tube. 



5. A. septentrionalis. 

 Calyx-lobes lanceolate, more than half as long as the calyx-tube. 



6. A. pinetorum. 

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



the spreading pedicels. 7. A. siibumbellata. 



Corolla shorter than the calyx. 8. A. diffusa. 



Calyx-teeth more or less spreading, ovate-triangular, foiiaceous, equalling or ex- 

 ceeding the whitish tube; corolla shorter than the calyx. 9. A. subulifera. 

 Calyx-tube in fruit hemispherical; teeth broadly triangular. 10. A. filiformis. 



1. A. arizonica A. Gray. Leaves oblanceolate, 5-15 mm. long, acute, 

 entire or denticulate, thin, minutely puberulent; scapes usually few, ascending 

 or erect, slender, 3-8 cm. high; bracts broadly spatulate or oval, usually acute, 

 2-6 mm. long; pedicels ascending; calyx-lobes lanceolate to ovate, 2-3 mm. 

 long, rather spreading; corolla much shorter than the calyx. Plains and valleys: 

 Ariz. Utah. Son. Mr-JVly. 



2. A. occidentalis Pursh. Leaves oblanceolate or spatulate, 5-15 mm. 

 long, entire or denticulate, puberulent; scapes 2-6 cm. high, puberulent; bracts 

 spatulate, obtuse, about 5 mm. long; pedicels ascending or spreading; calyx-lobes 

 lanceolate, ascending; corolla much shorter than the calyx. In dry or sandy 

 soil: Man. 111. Mo. Tex. B.C. Plain Submont. Ap-Je. 



3. A. simplex Rydb. Leaves oblanceolate, 3-6 mm. long, acute, entire, 

 minutely puberulent; scape 2-7 cm. high; bracts oval or lance-oval, 2-4 mm. 

 long; pedicels suberect; calyx-lobes lanceolate, about 1.5 mm. long, acute; corolla 

 small, shorter than the calyx. Poor soil: B.C. Utah Alta. Son. Submont. 

 Ap-My. 



4. A. puberulenta Rydb. Leaves oblanceolate, 1-3 cm. long, acute, entire 

 or sinuately denticulate; peduncles 3-10 cm. long; bracts narrowly lanceolate, 

 3-4 mm. long; pedicels spreading; calyx-lobes lanceolate, strongly keeled; corolla 



