ROSE FAMILY 443 



4. Fragaria bracteata Heller. Bracted Strawberry. Fig. 2460. 



Fragaria bracteata Heller, Bull. Torrey Club 25: 194. 1896. 

 Fragaria retrorsa Greene, Ottawa Nat. 18: 216. 1905. 



Rootstock short and rather thick. Leaves very thin, somewhat glaucous, silky when young, 

 glabrate in age ; petioles and scapes slender, villous with long spreading or reflexed hairs ; 

 leaflets broadly obovate, acute, coarsely serrate, 2-5 cm. long; scapes often 10 cm. long, often 

 exceeding the leaves, usually with a unifoliolate bract; flowers 15-20 mm. broad; sepals and 

 bractlets lanceolate-acute; petals often nearly twice the length of the sepals; fruit ovoid; achenes 

 superficial. 



Open forests especially in clearings, Transition Zone; British Columbia and Montana to the eastern slope of 

 the Sierra Nevada, California, and New Mexico. Type locality : Santa Fe Creek, nine miles east of Santa Fe, 

 New Mexico. May-June. 



5. Fragaria platypetala Rydb. Broad-petaled Strawberry. Fig. 2461. 



Fragaria virginiana var. illinoensis S. Wats. Bot. Calif. 1: 177. 1876. 

 Fragaria platypetala Rydb. Mem. Dept. Bot. Columbia Univ. 2: 177. 1898. 

 Fragaria latiuscula Greene, Ottawa Nat. 18: 216. 1905. 

 Fragaria virginiana var. platypetala Hall, Univ. Calif. Pub. Bot. 4: 198. 1912. 



Rootstock thick and woody. Leaves rather firm, glabrous and glaucous above, appressed- 



silky beneath ; petioles and scapes rather stout, villous with long spreading or reflexed hairs ; 



leaflets broadly cuneate to obovate, 2-8 cm. long, coarsely serrate or crenate above the middle, 



distinctly petiolulate ; flowers 15-25 mm. broad; sepals and bractlets lanceolate; petals almost 



orbicular, usually twice as long as the sepals; fruit hemispheric, 10-15 mm. broad; achenes in 



rather shallow pits. 



Open woods, mainly Transition Zone; Alaska to the Sierra Nevada, California, Montana, Wyoming, and 

 Utah. Type locality: Spout, British Columbia. May- June. 



Fragaria Suksdorfii Rybd. N. Amer. Fl. 22: 361. 1908. Leaflets short-petiolulate, elliptic-oblanceolate, 

 crenate above the middle with round-ovate teeth, densely silky beneath, becoming less so and glaucous in age; 

 sepals ovate-acuminate; petals broadly oval, 8 mm. long; fruit subglobose, about 1 cm. in diameter; achenes in 

 very shallow pits. Closely related to F. platypetala and perhaps not specifically distinct. Originally collected 

 "on dry grounds in open woods, Falcon Valley, Washington." 



Fragaria truncata Rydb. Mem. Dept. Bot. Columbia Univ. 2: 177. 1898. Closely related to F. platypetala, 

 being distinguished chiefly by the elliptic sepals and bractlets. Originally collected in Nevada County, California. 



Fragaria sibbaldifolia Rydb. Mem. Dept. Bot. Columbia Univ. 2: 176. 1898. This is probably a dwarf 

 alpine form of F. platypetala, and has been so designated by Hall (Univ. Calif. Pub. Bot. 4: 199. 1912). 

 Terminal leaflet broadly obovate, truncate, coarsely 3-7-toothed at the apex, 1—2 cm. long; achenes in deep pits. 

 Boreal Zones of the southern Sierra Nevada. 



15. SIBBALDIA L. Sp. PI. 284. 1753. 



Low, tufted perennial herbs, with short cespitose caudices, ternate leaves, and cymose 

 flowers and scape-like peduncles. Hypanthium campanulate ; sepals and bractlets 5. Petals 

 5, yellow. Stamens 5; filaments filiform, inclined. Pistils 5-20; styles lateral. Ovule at- 

 tached near the base of the style, amphitropous. [Name in honor of Robert Sibbald, a 

 Scotch botanist.] 



About 5 species of the arctic and alpine regions of the northern hemisphere. Type species, Sibbaldia pro- 

 cumbens L. 



1. Sibbaldia procumbens L. Sibbaldia. Fig. 2462. 



Sibbaldia procumbens L. Sp. PI. 284. 1753. 



Potentilla procumbens Clairv. Man. 166. 1811. Not Sibth. 1794. 



Potentilla Sibbaldii Hall. f. in Ser. Mus. Helv. 1 : 51. 1818. 



Densely tufted with short, decumbent or creeping, woody stems, and membranaceous stipules. 



Leaves 3-f oliolate, with slender petioles ; leaflets obovate or oblanceolate, cuneate at the base, 



3-5-toothed at the apex, sparsely pubescent on both surfaces ; peduncles axillary, nearly leafless, 



about equaling the leaves; sepals oblong-ovate, acute, 2-3 mm. long, much longer than the 



narrow bractlets ; petals yellow, oblong or oval, much shorter than the sepals. 



Moist places, Arctic-Alpine and Hudsonian Zones; Alaska to Greenland, south to the southern Sierra 

 Nevada and San Bernardino Mountains, California, Colorado, and New Hampshire; also in Europe and Asia. 

 Type locality: Lapland. June-July. 



16. ALCHEMILLA L. Sp. PL 123. 1753. 



Annual or perennial herbs, with alternate leaves and connate stipules. Leaves pal- 

 mately lobed or divided. Flowers usually cymose, but in ours in axillary few-flowered 

 clusters. Hypanthium campanulate to urn-shaped, enclosing the achene in fruit. Sepals 

 4-5, usually with as many minute bractlets. Petals none. Stamens 1-4, the anthers open- 

 ing by a transverse slit. Pistils 1-8, free from the hypanthium; styles nearly basal, per- 

 sistent. [Name from its fancied value in alchemy.] 



About 30 species, chiefly in the mountains from Mexico to Chile, with a few in Europe, Asia and South 

 Africa. Type species, Alchemilla vulgaris L. 



