440 ROSACEAE 



obovate, simply or doubly serrate, 1-3 cm. long ; stem leaves reduced ; flowers in an open many- 

 flowered cyme ; hypanthium glandular-hirsute ; sepals ovate-lanceolate, acute or acuminate, 

 6-7 mm. long, becoming 10 cm. long in fruit; bractlets linear-lanceolate, 4-5 mm. long; petals 

 obovate, yellow, about equaling the sepals. 



Open woods and hillsides, Upper Sonoran and Transition Zones; British Columbia to eastern Oregon, 

 South Dakota, and New Mexico. Type locality: California. Described from cultivated plants, grown from 

 seeds collected by Douglas, probably in the Columbia Basin. May-July. 



Potentilla valida Greene, Pittonia 3: 20. 1896. Stems stout, leafy, 4-10 dm. high, more or less glandular- 

 villous, branched above. Basal leaves with 7-11 leaflets, more or less pubescent or glabrate, glandular-atomifer- 

 ous; leaflets 3-6 cm. long, the terminal broadly obovate, the lateral nearly orbicular or obliquely elliptical; 

 stem leaves similar; cyme open, rather flat-topped in fruit; hypanthium viscid-villous; sepals ovate-lanceolate, 

 acute, 6 mm. long, becoming 10 cm. long in fruit; bractlets lanceolate, about 4 mm. long; petals yellow, nearly 

 orbicular, 8-10 mm. long. Meadows, Transition Zone; British Columbia and Idaho to Oregon and northern 

 Utah. Type locality: Victoria, Vancouver Island, British Columbia. Possibly only a large-flowered form of 

 Potentilla glandulosa Lindl. 



39. Potentilla Wrangelliana Fisch. & Ave-Lall. Wrangell's Cinquefoil. 



Fig. 2453. 



Potentilla Wrangelliana Fisch. & Ave-Lall. Ind. Sem. Hort. Petrop. 7: 140. 1840. 

 Drymocallis Wrangelliana Rydb. Mem. Dept. Bot. Columbia Univ. 2: 201. 1898. 

 Potentilla glandulosa var. Wrangelliana Th. Wolf, Bibl. Bot. 16: Heft 71: 137. 1908. 

 Drymocallis oregana Rydb. N. Amer. Fl. 22: 374. 1908. 



Stem stout, 4-8 dm. high, leafy, branched, densely glandular-villous. Basal leaves with 7-9 

 leaflets, sparingly pubescent on both surfaces ; leaflets often 5-6 cm. long, obovate or nearly 

 orbicular ; stem leaves with few leaflets, these little reduced in size ; cyme open, usually dichoto- 

 mously branching ; sepals ovate, abruptly obtuse or rounded with mucronate tip, 5-6 mm. long, 

 becoming 8-10 mm. long in fruit ; petals ochroleucous, broadly oval, about the length of the 

 sepals. 



Open woods and hillsides, Upper Sonoran and Transition Zones; British Columbia and Idaho to southern 

 California. Type locality: near Fort Ross, California. April-July. 



Drymocallis albida Rydb. N. Amer. Fl. 22: 375. 1908. Stems viscid-villous. Basal leaves with usually 

 7 leaflets, sparingly pubescent; leaflets 2—4 cm. long, the terminal obovate, the lateral more rounded; bractlets 

 linear-lanceolate, about 2 mm. long; sepals elliptic-ovate, mucronate, 4—5 mm. long, in fruit 7-8 mm. long; 

 petals obovate, whitish, usually shorter than the sepals. In moist shady places, British Columbia to Washington. 

 Doubtfully distinct from Potentilla Wrangelliana. 



40. Potentilla reflexa Greene. Greene's Cinquefoil. Fig. 2454. 



Potentilla glandulosa var. reflexa Greene, Fl. Fran. 1 : 65. 1891. 

 Potentilla reflexa Greene, Pittonia 3: 19. 1896. 



Drymocallis reflexa Rydb. Mem. Dept. Bot. Columbia Univ. 2: 203. 1898. 

 Drymocallis laxiflora Rydb. N. Amer. Fl. 22: 374. 1908. 



Stem 3-6 dm. high, villous and only slightly glandular. Basal leaves with about 7 leaflets, 



rather densely pubescent ; leaflets coarsely serrate with ovate teeth, the terminal rhombic, 2-3 



cm. long, the lateral smaller and more obovate ; cyme few-flowered, rather open ; bractlets 



lanceolate, much shorter than the ovate mucronate sepals ; petals deep yellow, broadly obovate, 



about equaling the sepals, reflexed in anthesis. 



Dry hillsides, Upper Sonoran Zone; foothills of the Sierra Nevada and southern California mountains. Type 

 locality: foothills, Sierra Nevada, California. April- June. 



41. Potentilla rhomboidea Rydb. Rhomboid Cinquefoil. Fig. 2455. 



Potentilla rhomboidea Rydb. Bull. Torrey Club 23: 248. 1896. 



Drymocallis rhomboidea Rydb. Mem. Dept. Bot. Columbia Univ. 2: 203. 1898. 



Stems slender, about 2 dm. high, simple, nearly glabrous or glandular-pubescent above. 

 Basal leaves short-petioled ; leaflets about 7, rhombic-ovate, the largest 1.5 cm. long, mostly- 

 acute, serrate with acute teeth, glabrous or sparsely pubescent ; stem leaves about 3, the lowest 

 similar, the others 3-foliolate and subsessile; cymes open, few-flowered; bractlets linear-oblong, 

 obtuse, 2-3 mm. long ; sepals broadly ovate, 4-5 mm. long ; petals yellow, obovate, a little longer 

 than the sepals; styles nearly basal, filiform, in fruit about twice as long as the smooth achene. 



Mountain meadows, Transition Zone; Washington and western Montana to southwestern Oregon. Type 

 locality: Deer Creek Mountains, Josephine County, Oregon. May-July. 



13. DUCHESNEA J. E. Smith, Trans. Linn. Soc. 10:372. 1811. 



Perennial herbs, with trailing- stems (runners) often rooting at the nodes, 3-foliolate, 

 long-petioled leaves, and axillary yellow flowers on slender peduncles. Sepals, bractlets, 

 and petals 5. Stamens numerous. Pistils numerous. Receptacle hemispherical, greatly en- 

 larged in fruit, but not pulpy. Achenes superficial. [Named in honor of A. N. Duchesne, 

 French botanist.] 



Two species, natives of southern Asia. Type species, Duchesnea indica (Andr.) Focke. 



1. Duchesnea indica (Andr.) Focke. Mock or Indian Strawberry, Fig. 2456. 



Fragaria indica Andr. Bot. Rep. pi. 479. 1807. 



Duchesnea indica Focke in Engler & Prantl, Nat. Pflanzenf. 3 s : 33. 1888. 



Stems trailing, forming leafy runners, silky-pubescent. Leaflets 2-4 cm. long, obovate or 



