204: ROSACEAE 



Eefs. — PoTENTiLLA DOUGLASii Greene, Pitt, 1:103 (1887). Eorhelia fusca Lindl. Bot. Eeg. 

 pi. 1997 (1837), type collected by Douglas, cited as "California," but undoubtedly Oregon or 

 north; Eydb. Mem. Dept. Bot. Columbia Univ. 2:136, pi. 71 (1898); not Potentilla fusca 

 Schlccht. (1839). HorJccUa capitata Lindl. Bot. Keg. sub t. 1997 (1837), type from Cal., Douglas. 

 E. parviflora Nutt.; H. & A. Bot. Beech. 338 (1838), "mountains of California," Nuttall; Rydb. 

 I.e. 2:134, pi. 68, figs. 1-6 (1898) ; not P. parviflora Desf. (1804) or Gaud. (1830). P. andersonii 

 Greene, Pitt. 1:104 (1887). Eorhelia irownii Rydb. N. Am. Fl. 22:276 (1908), type loc. s. side 

 Mt. Shasta, E. E. Brown 530. Var. pseudocapitata Jepson. Eorlcelia pseudocapitata Rydb. ; 

 Howell, Fl. Nw. Am. 180 (1898), type loc. Janesville (not "Tanesville"), Lassen Co., T. Brande- 

 gee. Var. tenella Greene, Fl. Fr. 67 (1891). Eorlcelia fusca var. tenclla "Wats.; B. & W. Bot. 

 Cal. 1:181 (1876), type from Sierra Co., Lemmon. E. tenella Rydb. Bull. Torr. Club 25:55 

 (1898) ; Mem. Dept. Bot. Columbia Univ. 2:136, pi, 72 (1898). Var. tenuisecta Jepson. Eor- 

 helia tenuisecta Rydb. N. Am. Fl. 22:278 (1908), type loc. Falcon Valley, Wash., SuJcsdorf 2492. 



48. p. congestaBaill. var. tilingii Jepson. Sierra Honet-dew. Steins ascend- 

 ing or erect from a decumbent base, more or less leafy below, 5 to 13 (or 17) inches 

 high, the leaves mostly basal; herbage silky- villous ; leaves pinnate, the blades 1 to 

 3 (or 5) inches long, with 5 to 9 (or 11) approximate leaflets; petioles I/2 to 2 (or 

 3) inches long; leaflets cuneate, varying to cuneate-elliptic or linear-oblong, usually 

 3-toothed at apex (otherwise entire), 4 to 6 (or 11) lines long; cyme much-branched, 

 commonly rather open with the branches bearing capitate clusters, or the whole 

 cyme rather dense, or the clusters reduced to one; flowers 2 to 3 lines wide, on 

 slender pedicels; calyx-tube reddish or rusty, bowl-shaped or campanulate, 1^/4 to 

 1% lines wide, % to 1 line high; petals white, linear or narrow-oblanceolate, acute 

 at both ends, 1 to 1% lines long, slightly exceeding calyx-lobes; filaments narrowly 

 linear-lanceolate; pistils 7 to 13; achenes rugulose-reticulate. 



Sandy flats 0^ openly forested ridges, 2300 to 6500 (or 8000) feet : North Coast 

 Ranges from Lake Co. to Siskiyou Co. ; Sierra Nevada from Tulare Co. to Modoc 

 Co. North to Oregon. May-July. 



Note on variation. — The seed of the original PotentUla congesta (Eorlcelia congesta Hook.) 

 was undoubtedly collected near the "Umptqua River," southwestern Oregon, by Douglas. This 

 original plant has broadly spatulate petals ("white with a yellowish claw") and very broadly 

 dilated outer filaments described as "obcuneate," with the inner filaments narrower but still 

 quite broadly subulate. Certain Oregon specimens, although differing in minor points, appear to 

 represent the species (Woodville, Thomas Eowell 185). Specimens from the more northerly 

 localities in California, both coastal and interior, are somewhat variable in the shape of petals 

 and filaments. In the Sierra Nevada, especially southward, the linear-acute petals and lanceolate 

 filaments characteristic of var. tilrngii are nearly always constantly associated. The forms de- 

 scribed as Horkelia tridentata Torr. and H. flavescens Rydb. represent unusual phases inter- 

 mediate toward the species with regard to the associated characters of filaments and petals. 



Locs. — North Coast Ranges : Mt. Sanhedrin, w. Lake Co., Eall 9473 ; Soldiers Ridge, Yollo 

 Bolly Mts., Jepson 103p; Larrabee Valley, Humboldt Co., Tracy 7025 (petals rounded at apex) ; 

 Sisson, Siskiyou Co., Jepson 120p. Sierra Nevada: Round Mdw., Giant Forest, Jepson 705; 

 Hume Lake, Fresno Co., Earriet Kelley ; Dinkey Mdws., Fresno Co., Crum 1247; Curtin Mdws., 

 near Tuolumne Grove, Jepson 10,551; Hetch-Hetchy, A. L. Grant 848; Belle Mdw., Tuolumne Co., 

 Jepson 6472; Dorrington, Calaveras Co., Jepson 10,067; Silver Lake, Amador Co., Eansen 985; 

 Donner Lake, Sonne; Bear Valley, Nevada Co., Jepson 119p; Big Mdws., Plumas Co., Jepson 

 4058; Forest Ranch, Butte Co., Seller 11,413; Warner Creek Valley, e. Tehama Co., Jepson 

 12,314; Forestdale region, sw. Modoc Co., M. S. Balcer. P. congesta in typical form does not 

 enter California but the following intermediates are perhaps nearer to the species than to the 

 variety tilingii: Big Mdws., Plumas Co., R. M. Austin; Sierra Co., Lemmon 90 (type collection 

 of Horkelia flavescens Rydb.) ; Placer Co., M. E. P. Ames. 



Refs. — Potentilla congesta Baill. Hist. PI. 1:369 (1867-9). Eorlcelia congesta Hook. 

 Bot. Mag, t. 2880 (1829), the type a cultivated plant, the seed collected by Douglas, undoubtedly 

 on the "Umptqua River," s. Ore., not on "Cape Mendocino" which Douglas probably never visited. 

 Var. tilingii Jepson, Man. 496, fig. 491 (1925). Eorlcelia tilingii Regel, Acta Hort. Petrop. 1 :153 

 (1871), type loc. Nevada City, Tiling; Gartenfl. t. 711 (1872), P. tilingii Greene, Pitt. 1:105 

 (1887). Eorlcelia tridentata Torr. Pac. R. Rep, 4:84, pi. 6 (1857), type loc. Duffield ranch, 

 above Confidence, Tuolumne Co., Bigelow ; not P. tridentata Soland. (1789). Ivesia tridentata 

 Gray, Proc. Am. Acad. 7:338 (1868). E. flavescens Rydb. Mem. Dept. Bot. Columbia Univ. 

 2:138, pi. 75 (1898), type loc. Sierra Co., Lemmon 60 (petals, in isotype, oblanceolate, obtuse; 

 filaments dilated). 



