174 ROSACEAE 



Refs. — Fragaria virginiana Diich. Ilist. Nat. Frais. 204 (1766), type from Virginia. Var. 

 PLATYPETALA Hall, Univ. Cal. Publ. Bot. 4:198 (1912) ; Jcpson, Man. 482 (1925). F. platypetala 

 Rydb. Mem. Dept. Bot. Columbia Univ. 2:177 (1898), type loc. Spout, B. C, Maco%m. F. trtin- 

 cata Rydb. I.e., typo loc. Nevada Co., Michener 4- Bioletti (pubescence more sparse, scape with 

 fewer llowers, sepals and bractlets broader, petals narrow, ex char.). Var. sibhaldifolia Jepson, 

 I.e. 483. F. sihbaldifolia Rydb. I.e. 176, type loc. Mt. Whitney, Tulare Co., Coville ^ Funston 

 1712. F.i;esmCov.Contrib.U. S.Nat. Herb. 4:95 (1893) ; not F. vesca L. (1753), F. virginiana 

 var. platypetala f. sihbaldifolia Hall, I.e. 199. 



3. F. calif omicaC.&S. Wood Strawberry. Scapes 4 to 5 (rarely 10) inches 

 high, cymosel}' 2-flowered; scapes and petioles pilose, the hairs ascending or spread- 

 ing; leaflets thin, light green, 1 to 1% inches long; flowers 5 to 11 lines broad; fruit 

 globose, about 4 to 5 lines broad, the achenes borne superficially. 



Openly wooded hills or vales : Southern California mountains, 4500 to 6600 

 feet; Sierra Nevada from Tulare Co. to Butte Co., 3500 to 6000 feet; Coast Ranges 

 from Santa Cruz Co. to Siskiyou Co., mostly 50 to 2000 feet. North to Washington. 



IjOCs. — The hairy pubescence is a little variable in amount and more variable in position on 

 the stems and petioles. The hairs may be ascending (Ross Valley, Marin Co., Jepson 13,873), 

 partly ascending and partly spreading (Cahto, Mendocino Co., Jepson 1854), spreading (Mari- 

 posa Big Trees, Eall 8992, = var. crinita Hall), or deflexed-spreading (Sisson, Siskiyou Co., Jep- 

 son 13,874). As validating the range we cite as follows. S. Cal. mts.: Julian, e. San Diego Co., 

 T. Brandegee; Santa Rosa Mts., Muns 5855; Strawberry Valley, San Jacinto Mts., Condit; San 

 Bernardino Mts., Parish; Las Cruces, Santa Inez Mts., ace. Peirson. Sierra Nevada: Redwood 

 Mdws., Mineral King, Tulare Co., Hall # Babcock 5375 ; Hodgdon ranch, Mariposa Co., Jepson 

 10,531; Hogan Mt., Mariposa Co., Congdon; Calaveras Big Trees, A. L. Grant; Brush Creek, 

 Butte Co., Conger. Coast Ranges: Santa Lucia Mts., Barber; Carmel Bay, Elmer 4897; Aptos, 

 Santa Cruz Co., C. F. BaTcer 1859 ; Mt. Madonna, Santa Cruz Mts., Jepson 9683 ; Lexington, Santa 

 Clara Co., Heller 7296 ; Lake San Andreas, San Mateo Co., Jepson 9545 ; Mt. Diablo, Contra Costa 

 Co., Brewer 1145 ; Mt. Davidson, San Francisco, Jepson 10,348 ; near Calistoga on Knights Valley 

 grade, Jepson 13,872; Cahto, Mendocino Co., Jepson 1854; Buck Mt., Humboldt Co., Tracy 4340; 

 Berry's ranch, Redwood Creek, n. Humboldt Co., Jepson 1973 ; betw. Sisson and Upton, Siskiyou 

 Co., Jepson 13,874 ; Marble Mt., Siskiyou Co., Chandler 1558 ; Crescent City. Fl. Apr.-June. 



Var. f ranciscana Rydb. Leaves thicker and more strongly veined. — Exposed habitats about 

 San Francisco Bay: Kings Mt., San Mateo Co., C. F. Baker 233; Berkeley Hills, Alameda Co., 

 Chandler; Mt. Tamalpais, Brandegee; Calistoga (sw. of), Jepson 4021. 



Refs. — Fragaria californica C. & S. Linnaea 2:20 (1827), type from Cal., Chamisso; Jep- 

 son, Fl. W. Mid. Cal. 280 (1901),ed. 2, 207 (1911), Man. 483 (1925). F. vesca var. g Nutt.; T. & 

 G. Fl. 1 :448 (1840), type loc. from Oregon, Nuttall. F. crinita Rydb. Mem. Dept. Bot. Columbia 

 Univ. 2:171 (1898), type from Wash., Wilkes Exped. (flowers large, stems and petioles densely 

 pilose). .F. californica var. crinita Hall, Univ. Cal. Publ. Bot. 4:198 (1912). Var. franciscana 

 Rydb. I.e. 173, type loc. Marin Co., Eastwood; Jepson, Man. I.e. 



10. POTENTILLA L.' Five Finger 



Perennial herbs (rarely annuals or shrubs) . Leaves compound, typically with 

 serrate or cleft leaflets. Flowers white, yellow (or purple in one), in terminal 

 cymes, rarely solitary, the cymes sometimes capitate. Calyx-tube (hjT)anthium) 

 saucer-shaped, campanulate or cup-shaped, bearing 5 calyx-lobes and 5 alternate 

 bractlets. Petals orbicular to linear. Stamens 10 (rarely 5) to many, the filaments 

 filiform or dilated. Pistils few to numerous, borne upon an elevated receptacle, 

 becoming in fruit small turgid crustaceous achenes; styles sub-basal, lateral or 

 nearly terminal, deciduous. — Species 360, North America, Europe and Asia, 

 markedly arctic, a few in New Zealand, northern Africa and the Andes of South 

 America. (Diminutive of the Latin potens, powerful, some species medicinal.) 



Bibliog. — Nestler, C. G., Monographia de Potentilla, praemissis nonnullis observationibus 

 circa familiam Rosacearum, 1-80, t. 1-12 (1816). Lehmann, J. G. C, Monographia generis 

 Potentillarum, 1-201, t. 1-20 (1820); Novarum et minus cognitarum stirpium pugillus, 9:1-7 

 (1851) ; Revisio Potentillarum ieonibus illustrato, i-xiv, 1-230, t, 1-64, pflzgeog. t. 1-5 (1856). 

 Gray, A., [Notes on] Horkelia and Ivesia (Proc. Am. Acad. 6:528-532,-1865). Regel, E., 

 Revisio specierum generis Horkeliae (Acta Hort. Petrop 1:151-154, — 1871). Watson, S., Re- 

 vision of the extra-tropical N. Am. species of the genus Potentilla, excluding Sibbaldia, Horkelia, 



^ Ethel K. Crum, a scholarly assistant employed (1930-1933) on this and related groups, be- 

 came ardently attached to Potentilla, wherefore certain new varieties bearing her name. 



