ROSE FAMILY 417 



2. Horkelia elata (Greene) Rydb. Tall Horkelia. Fig. 2380. 



Potentilla elata Greene, Pittonia 1: 100. 1887. 



Potentilla californica var. elata Greene, Fl. Fran. 1: 66. 1891. 



Horkelia elata Rydb. Bull. Torrey Club 25: 54. 1898. 



Stems slender and numerous, 5-8 dm. high, softly glandular-villous. Basal leaves numerous, 

 slender-petioled ; leaflets obovate or cuneate-flabelliform, cleft and incised into very narrow 

 segments, soft-villous ; stem leaves few and smaller ; hypanthium campanulate, glandular-villous ; 

 bractlets lanceolate, usually entire, 4-6 mm. long, slightly exceeding the triangular-lanceolate 

 sepals ; petals about equaling the sepals. 



Shady slopes, Upper Sonoran and Transition Zones; Inner Coast Ranges and western slopes of the Sierra 

 Nevada, central California. Type locality: shady banks of the upper Napa River, a little above Calistoga. 

 June-Sept. 



Horkelia glandulosa Eastw. Bull. Torrey Club 32: 195. 1905. A more robust plant than typical H. elata 

 Greene, and with fewer leaflets, usually about 11 pairs, but otherwise closely resembling it and perhaps not 

 distinct. Known only from the type locality and vicinity: Laytonville, Mendocino County, California. 



3. Horkelia californica Cham. & Sch. California Horkelia. Fig. 2381. 



Horkelia californica Cham. & Sch. Linnaea 2: 26. 1827. 



Horkelia grandis Hook. & Am. Bot. Beechey 339. 1838. 



Potentilla californica Greene, Pittonia 1 : 100. 1887. 



Potentilla californica var. carmeliana Jepson, Fl. W. Mid. Calif. 282. 1901. 



Stems stout, leafy, 0.5-1 m. high, glandular-pubescent and fragrant. Leaves densely glandu- 

 lar-pubescent, the basal numerous bearing 11-21 leaflets, the cauline smoother; leaflets obovate 

 to orbicular in outline, 2-5 cm. long, toothed and incised, with mostly acute teeth ; inflorescence 

 open; bractlets 5-10 mm. long, slightly exceeding the sepals, ovate, usually 3-toothed; sepals 

 ovate, acute, much longer than the strap-shaped petals. 



Open places, near the coast, Upper Sonoran and Transition Zones; Humboldt Bay to Santa Cruz County 

 and locally in San Luis Obispo County, California. Type locality : San Francisco. May-Sept. 



4. Horkelia cuneata Lindl. Wedge-leaved Horkelia. Fig. 2382. 



Horkelia cuneata Lindl. Bot. Reg. 23: under pi. 1997. 1837. 



Horkelia californica var. cuneata A. Gray, Proc. Amer. Acad. 6: 529. 1865. 



Potentilla Lindleyi Greene, Pittonia 1: 101. 1887. 



Horkelia platycalyx Rydb. Mem. Dept. Bot. Columbia Univ. 2: 131. 1898. 



Potentilla multijuga of various California authors. Not Lehm. 



Stems several, from a short woody caudex, rather slender, 15-30 cm. high, villous and 

 glandular or nearly glabrous, fragrant. Leaflets of basal leaves 8-12 pairs, cuneate to obovate, 

 about 1 cm. long, deeply toothed above, villous or hirsute-puberulent ; cyme few-flowered, rather 

 dense; hypanthium villous-glandular, cupulate, 5-8 mm. broad, densely pilose within; bractlets 

 ovate-lanceolate; sepals slightly exceeding the bractlets, acuminate; petals oblong-spatulate, 

 about one-third longer than the sepals. 



Open fields near the coast, Upper Sonoran and Humid Transition Zones; Santa Cruz County to Santa 

 Barbara County, California. Type locality: California, probably Monterey. May-Oct. 



Horkelia cuneata subsp. sericea (A. Gray) Keck, Lloydia 1 : 86. 1938. {Horkelia californica var. sericea 

 A. Gray, Proc. Amer. Acad. 6: 529. 1865; H. Kelloggii Greene, Bull. Calif. Acad. 2: 416. 1887.) Herbage 

 densely silky-sericeous, only obscurely glandular, hypanthium as in the typical species densely pilose within and 

 the flowers usually in glomerules. Along the coast from Sonoma County to Los Angeles County, California. 



Horkelia cuneata subsp. puberula (Greene) Keck, op. cit. 87. {Potentilla puberula Greene, Pittonia 1: 102. 

 1887; P. Lindleyi var. puberula Jepson, Man. Fl. PI. Calif. 485. 1925.) Herbage rather thinly glandular- 

 pubescent; flowers in open cymes, not glomerate; hypanthium sparsely pilose to glabrate within. Inland mesas 

 and hills of southern California from San Luis Obispo County to San Bernardino and San Diego Counties. 

 Type locality: mesas five miles west of San Bernardino, California. 



5. Horkelia truncata Rydb. Ramona Horkelia. Fig. 2383. 



Horkelia truncata Rydb. N. Amer. Fl. 22: 274. 1908. 

 Potentilla truncata Jepson, Man. Fl. PI. Calif. 495. 1925. 



Stems several from a woody caudex, 2-5 dm. high, rather thinly glandular-pubescent. 

 Basal leaves several, glandular-pubescent and hirsute on the veins ; leaflets 5-9, obovate-cuneate, 

 truncate at the apex, crenate-serrate on the sides, usually with 3 larger teeth at the apex; 

 inflorescence few-flowered and open ; hypanthium saucer-shaped, 7-8 mm. wide ; bractlets lanceo- 

 late-ovate, 4-5 mm. long, shorter than the ovate, acuminate sepals ; petals broadly obovate, 5-6 

 mm. long. 



Hillsides, Upper Sonoran Zone; western San Diego County, California, and adjacent Lower California. 

 Type locality: Ramona, California. May- June. 



6. Horkelia Parryi Greene. Parry's Horkelia. Fig. 2384. 



Potentilla Parryi Greene, Pittonia 1 : 102. 1887. 



Horkelia platypetala Rydb. Bull. Torrey Club 25: 55. 1898. 



Stems several, 1-2 dm. high, from a much branched cespitose caudex, glandular-puberulent ; 

 stipules ovate, often pectinately toothed. Leaflets of basal leaves 4-5 pairs, obovate-cuneate, 5-10 

 mm. long, deeply incised, somewhat villous-pubescent but green ; cyme with slender branches ; 

 pedicels very slender, 10-15 mm. long, recurved in fruit; hypanthium 6-7 mm. broad in fruit; 

 sepals ovate-lanceolate, 5 mm. long, much larger than the lanceolate bractlets; petals obovate- 

 oblong, exceeding the sepals, rounded at the apex. 



Stony places, Upper Sonoran and Arid Transition Zones; foothills of the Sierra Nevada from Eldorado 

 County to Calaveras County, California. Type locality: vicinity of lone, Amador County, California. April- July. 



