ROSE FAMILY 439 



33. Potentilla palustris L. Purple or Marsh Cinquefoil. Fig. 2447. 



Comarum palustre L. Sp. PI. 502. 1753. 



Potentilla palustris Scop. Fl. Cam. ed. 2. 1: 359. 1772. 



Stems stout, ascending, 2-5 dm. high, the upper part pubescent and more or less glandular. 

 Leaves S-7-foliolate, the lower long-petioled ; leaflets 2-6 cm. long, oblong or oval, sharply 

 serrate, obtuse or acute, stipules membranaceous; sepals ovate, acuminate, 10-15 mm. long, 

 wine-purple within ; petals very much smaller than the sepals, ovate-lanceolate. 



Swamps and peat bogs, Boreal Zones; Alaska to Labrador, northern California, Wyoming, Iowa, and New 

 Jersey, also Europe and Asia. Type locality : Europe. May-Aug. 



34. Potentilla Convallaria Rydb. Convallaria Cinquefoil. Fig. 2448. 



Potentilla Convallaria Rydb. Bull. Torrey Club 24: 249. 1898. 



Drymocallis Convallaria Rydb. Mem. Dept. Bot. Columbia Univ. 2: 193. 1898. 



Drymocallis corymbosa Rydb. N. Amer. Fl. 22: 369. 1908. 



Potentilla arguta var. Convallaria Th. Wolf, Bibl. Bot. 16, Heft 71: 134. 1908. 



Stems 3-10 dm. high, more or less glandular-villous. Basal leaves with 7-11 leaflets; 

 petioles 2-10 cm. long, viscid-villous ; leaflets 3-5 cm. long, the upper obovate, the lower more 

 orbicular and smaller, coarsely doubly serrate; cyme many-flowered, rather narrow and com- 

 pact or more or less flat-topped ; bractlets linear-lanceolate, 4-5 mm. long ; sepals ovate-lanceo- 

 late, acute, 5 mm. long, becoming 8 mm. long in fruit ; petals cream-white, 5-6 mm. long. 



Mountain meadows, Boreal Zones; British Columbia and Athabasca to Washington, Colorado, and New 

 Mexico. Type locality: near Bozeman, Montana. 



35. Potentilla Hansenii Greene.. Hansen's Cinquefoil. Fig. 2449. 



Potentilla glandulosa var. nevadensis S. Wats. Bot. Calif. 1: 178. 1876. 



Potentilla glandulosa var. lactea Greene, Fl. Fran. 65. 1891. 



Potentilla Hansenii Greene, Pittonia 3: 20. 1896. 



Potentilla lactea Greene, Pittonia 3: 20. 1896. 



Drymocallis Hansenii Rydb. Mem. Dept. Bot. Columbia Univ. 2: 200. 1898. 



Drymocallis cuneifolia Rydb. op. cit. 2 : 204. 



Potentilla Piersonii Munz, Bull. S. Calif. Acad. 31 : 65. 1932. 



Stems slender, 3-6 dm. high, finely pilose, only slightly viscid. Basal leaves with about 9 

 leaflets ; petioles 2-5 cm. long, pilose ; leaflets sparingly pubescent on the veins and only slightly 

 glandular, the upper obovate, 15-30 mm. long, the lower smaller and much rounded, stem leaves 

 reduced ; hypanthium pilose ; sepals lanceolate, acute, 4 mm. long, becoming 6 mm. long in fruit ; 

 bractlets lanceolate, 2-3 mm. long ; petals cream-colored, obovate, about 5 mm. long. 



Mountain meadows, Transition and Canadian Zones; Sierra Nevada and San Bernardino Mountains, Cali- 

 fornia. Type locality: Fresno and Kern Counties, California. June-Aug. 



36. Potentilla ashlandica Greene. Ashland Cinquefoil. Fig. 2450. 



Potentilla ciliata Howell, Fl. N.W. Amer. 1: 175. 1898. Not Greene, 1887. 



Potentilla ashlandica Greene, Pittonia 3: 248. 1898. 



Drymocallis ashlandica Rydb. Mem. Dept. Bot. Columbia Univ. 2: 200. 1898. 



Drymocallis monticola Rydb. N. Amer. Fl. 22: 370. 1908. 



Drymocallis gracilis Rydb. Bull. Torrey Club 28: 177. 1901. 



Stems 2-3 dm. high, slender, arising from creeping rootstocks, simple below, branched above 

 with ascending or erect branches, only slightly glandular, finely pilose above. Leaflets of basal 

 leaves 5-9, obovate, 10-25 mm. long, coarsely and doubly serrate ; stem leaves few, smaller 3-5- 

 foliolate ; cymes narrow ; hypanthium densely pilose, usually half the length of the sepals ; petals 

 cream-yellow, orbicular, 8-10 mm. long, well exceeding the sepals ; styles glandular. 



Mountain streams and meadows, mainly Canadian Zone; southern Cascade and Siskiyou Mountains, Ore- 

 gon, to the southern Sierra Nevada, California. Type locality: Ashland Butte, Oregon. June-July. 



37. Potentilla pumila (Rydb.) Fedde. Dwarf Cinquefoil. Fig. 2451. 



Drymocallis pumila Rydb. N. Amer. Fl. 22: 372. 1908. 



Potentilla pumila Fedde, Bot. Jahresb. 36 a : 494. 1910. 



Potentilla glandulosa var. pumila Jepson, Fl. Calif. 2: 181. 1936. 



Cespitose, the stems 10-20 cm. high, sparingly viscid-puberulent. Leaflets of the basal leaves 

 9-11, glandular-puberulent or glabrate, the terminal broadly obovate, about 1 cm. long, serrate 

 with ovate teeth, the lateral leaflets often broader than long ; stem leaves 1-3, the upper otten 

 only 3-foliolate ; inflorescences corymbose, few-flowered ; bractlets elliptic to oblong-lanceolate, 

 acute, a little shorter than the ovate sepals ; petals orbicular or nearly so, 7-8 mm. long, yellow. 



Moist places, Upper Sonoran and Arid Transition Zones; southeastern Oregon to northeastern California, 

 Nevada, and Utah. Type locality : Moist cliffs, Steens Mountain, Oregon. June-July. 



38. Potentilla glandulosa Lindl. Sticky Cinquefoil. Fig. 2452. 



Potentilla glandulosa Lindl. Bot. Reg. 19: pi. 1583. 1838. 

 Potentilla arguta var. glandulosa Cockerell, W. Amer. Sci. 5: 11. 1888. 

 Drymocallis glandulosa Rydb. Mem. Dept. Bot. Columbia Univ. 2: 198. 1898. 

 Drymocallis amplifolia Rydb. N. Amer. Fl. 22: 373. 1908. 



Stems strict, slender, 3-6 dm. high, viscid and glandular-hirsute, branching above. Basal 

 leaves with 7-9 leaflets, nearly glabrous above, sparingly glandular-hirsute beneath; leaflets 



