ROSE FAMILY 123 



14. COMARUM L. Marsh Cinquefoil, Purple Marshlocks, 

 Cowberry. l. C. palustre. 



15. FRAGARIA L. Strawberry. 



Pubescence of scape and petioles divaricate, i. e., generally spreading at right angles or 

 somewhat reflexed (scanty and less spreading in no. 3) . 

 Leaflets sessile; achenes superficial on the receptacle. 



Flowers pinkish, nodding from the beginning. 1. F. Helleri. 



Flowers white, erect or spreading, nodding only in fruit. 



Calyx in fruit spreacnng or ascending; scape generally with long divaricate 



hairs and a leafy bract. 2. F. hracleata. 



Calyx in fruit reflexed; leaflets rhombic-obovate, acute; scape and petioles 

 sparingly hairy; hairs more ascending or appressed. 3. F. americana. 



Leaflets usually petlolulate; achenes set in usually deep pits. 



Plant more or less glaucous; petals usually orbicular and twice as long as the 

 sepals. 

 Sepals and bractlets elliptic. 4. F. truncata. 



Sepals and bractlets lanceolate. 



Sepals linear-lanceolate; leaflets cuneate, somewhat coriaceous, sharply 



toothed at the apex. 5. F. cuneifolia. 



Sepals broadly lanceolate; leaflets broadly obovate or broadly cuneate, 

 only a little longer than broad, with coarse acute teeth. 



6. F. platypetala. 

 Plant not glaucous; petals elliptic, generally exceeding the sepals by one-half, 



usually over 10 mm. long; achenes set in shallow pits; leaves Arm. 



7. F. grandiflora. 

 Pubescence of the scape and petioles appressed or ascending; achenes in pits. 



-Plemts not glaucous. 



Leaflets usually more than 3 cm. long, very veiny beneath; runners many. 



8. F. prolifica. 

 Leaflets usually 1-3 cm. long, not very veiny; runners few. 9. F. pumila. 



Plants more or less glaucous. 

 Leaves rather thin. 



Leaflets obovate; scape several-flowered. 10. F. gla,uca. 



Leaflets oblong-cuneate; scape 1-4-flowered. 11. F. pauciflora. 



Leaves rather thick. Arm; leaflets oblong-cuneate. 12. F. ovalis. 



16. SIBBALDIA L. l. 5. procumbens. 



17. DASIPHORA Raf. Shrubby Cinquefoil, Yellow Rose. 



1. D. fruticosa. 



18. DRYMOCALLIS Fourr. 



Style fusiforna, less than twice as long as the ovary. 

 Sepals ovate to lanceolate, acute, rarely acuminate. 



Petals white or cream-colored, often, however, turning more yellowish in drying. 

 Petals slightly if at all exceeding the sepals; inflorescence many-flowered, 

 dense. 

 Leaves densely hairy; petals orbicular or nearly so, 7-8 mm. long; cyme 



short and dense; stem densely short-hairy. 1. D. agrimonioides. 



Leaves sparingly hairy; petals obovate, 5-6 mm. long. 



Cyme short, flat-topped; leaflets roimded-obovate to flabelliform; stem 



and petioles not conspicuously long-hairy. 2. D. corymbosa. 

 Cyme elongate, narrow; leaflets more or less rhombic-obovate; stem 

 and petioles conspicuously long-hairy, especially below. 



3. D. convallaria. 

 Petals much exceeding the sfepals; cyme open, few-flowered; stem slender. 



4. D, pseudorupestris. 

 Petals yellow in anthesis. 



Leaflets with ovate teeth. 



Petals much exceeding the sepals in length. 



Bractlets lanceolate to linear; sepals lanceolate or ovate-lanceolate. 

 Plant tall, 3-10 dm. high; cyme flat-topped. 



Leaflets rhombic-obovate, acute, at least the terminal one; 



inflorescence leafy. 5. D. foliosa. 



Leaflets of the basal leaves orbicular to obovate, obtuse; upper 

 leaves reduced. 6. D. valida. 



Plant low, 2—3 dm. (rarely 4 dm.) high; cyme narrow, leafy; leaflets 

 orbicular or rounded-obovate. 7. D. flssa. 



Bractlets elliptic or oval; sepals ovate; stem 1-1.5 dm. high, almost 

 scapose. 8. D. pumila. 



Petals slightly if at all exceeding the sepals, 5-7 mm. long. 



Bractlets linear-lanceolate, about two-thirds as long as the lanceolate 

 sepals ; leaflets obovate, irregularly or doubly toothed. 



9. D. glandulosa. 

 Bractlets oblong or oblong-lanceolate; sepals ovate-lanceolate; leaflets 

 more evenly simple-toothed, the lateral ones inclined to be orbicu- 

 lar. 10. D. arizonica. 

 Leaflets incised, with lanceolate teeth. 11. D. incisa. 



