ROSE FAMILY 201 



42. P. hispidula Jepson. Alpine Honey-dew. Stems slender, erect, 6 to 10 

 inches high; herbage hispid and glandular-pubescent; leaves pinnate, the basal 

 with blades % to 4 inches long; petioles nearly half as long; cauline leaves few, 

 % to % inch long; leaflets 16 to 21, fan-shaped or broadly cuneate, divided about 

 half way into 4 or 5 oblong or elliptic lobes, markedly hispid, especially at the tips, 

 2 to 3 lines long; cyme a little lax, % to 1% inches wide, somewhat few-flowered; 

 flowers 4 to 6 lines wide; calyx-tube bowl-shaped, l^/^ to 1% lines wide; petals 

 white, cuneate-obovate, emarginate to rounded at apex, rotately spreading, 2 to 

 21/2 lines long, exceeding the calyx-lobes; stamens 10; filaments white, lanceolate or 

 oblong-lanceolate, those opposite petals % shorter; achenes 12 to 18, apparently 

 smooth. 



Alpine pine slopes and meadows, 10,000 to 10,500 feet : "White Mts. (Mono and 

 Inyo Cos.) July- Aug. 



Geog. note. — Potentilla hispidula is an extremely narrow endemic limited to the White Mts. 

 with only one recorded definite locality (Silver Canon near Big Prospector Mdw., Jepson 7347). 

 The resemblance between this species and P. stenoloba (and its so-called variety micheneri) is 

 rather close. There is, however, a profound climatic and topographic difference between the 

 habitat of P. hispidula in the desert range of the White Mts. and the habitat of P. stenoloba (P. 

 micheneri) on the fog-drenched Mt. Tamalpais of the Pacific coast line. 



Eefs. — Potentilla hispidula Jepson, Man. 493 (1925). Horkelia hispidula Eydb. N. Am. 

 Fl. 22:278 (1908), type loc. White Mts., Mono Co., W. E. ShocMey 596. H. micheneri Eydb. 

 Mem. Dept. Bot, Columbia Univ. 2:127 (1898) in part. 



43. p. daucifolia Greene. Yellow Honey-dew. Stems erect or ascending, 

 rather rigid, 6 to 14 inches high; herbage (especially the leaves) villous; leaves 

 pinnate, the basal with blades 2 to 5 inches long; petioles V2 to 3 inches long; leaflets 

 11 to 17, 3 to 8 lines long, 2-parted, the segments 2 or 3-cleft into linear divergent 

 lobes; stipules 2 to 3 times divided into filiform segments, long-pilose, forming a 

 conspicuous hairy tuft on the root-crown below the erect leaf -blades ; cyme rather 

 compact or even capitately congested ; flowers 5 to 7 lines wide ; calyx-tube saucer- 

 shaped, 1% to 2 lines wide; petals cream-color, spatulate-orbicular or -obovate, 

 truncatish or obtuse, 2 to 3^/2 lines long, slightly exceeding the calyx-lobes; stamens 

 10; filaments petaloid-dilated, those opposite the calyx-lobes deltoid; achenes 5 to 

 12, smooth. 



Rocky slopes and ridges, 2700 to 4000 feet : Trinity Co. to Siskiyou Co. North 

 to Oregon. Apr.-June. 



Locs. — Trinity Co.: Stuart Fork, H. S. Yates 366. Siskiyou Co.: Edgewood, Lemmon; 

 Goosenest foothills, Butler 1634 ; Shasta Valley, Butler 713 ; Quartz Valley divide, Butler 603 ; 

 Ager, K. Brandegee. 



Tax. note. — Potentilla daucifolia is a well-marked species. Of named segregates Horkelia 

 pulchra Eydb. is too near the ordinary form of P. daucifolia for recognition even as a variety. 

 The lesser depth of leaflet incision as described by Eydberg is not striking in the type specimen. 

 (Mt. Shasta, Parry, Herb. N. Y. Bot. Gard.), since these leaflets, 5 to 7 lines long, are cleft 

 to within 1^^ or 2 lines of the midrib. Alexander 4" Kellogg 109a (Mayten, Siskiyou Co.) is 

 a good match for the type of H. pulchra as to leaflets, while 109b and c are about as usual in 

 P. daucifolia. No California specimens with hirsute pubescence (the form Horkelia hirsuta 

 Lindl.) are known to us. Eydberg described Horkelia caruifolia as not at all glandular, but the 

 Ashland, Ore., specimens (Howell 1129 and B. M. Austin 256), both cited by himin the mono- 

 graph, are quite glandular on the upper stem. This segregate appears to be identical with var. 

 indicta Jepson. 



Var. indicta Jepson. Leaf -segments filiform or nearly so ; petals suborbicular or somewhat 

 fan-shaped ; filaments broadly subulate. — Thinly wooded low gravelly hills, western Tehama Co. 

 Also southern Oregon. 



Eefs. — Potentilla daucifolia Greene, Pitt. 1:160 (1888), type loc. Klamath and Shasta 

 valleys, Greene; Jepson, Man. 493, fig. 489 (1925). HorTcelia congesta T. & G. Fl. 1:434 (1840) ; 

 not H. congesta Hook (1829). K. congesta B. & W. Bot. Cal. 1:181 (1876) in part. E. pilosa 

 Nutt.; T. & G. Fl. I.e. as synonym (1840) ; not P. pilosa Willd. (1799). E. hirsuta Lindl. Bot. 

 Eeg. sub t. 1997 (1837), type stated as from "California," in reality Umpqua Eiver, s. Ore., 

 Douglas (plant hirsute, ex char.) ; not P. hirsuta Michx. (1803). P. congesta var. lobata Lem- 

 mon, Bull. Torr. Club 16:221 (1889), type loc. Edgewood, Siskiyou Co., Lemmon. EorTcelia 

 pulchra Eydb. N. Am. Fl. 22:280 (1908), type loc. Mt. Shasta, Parry (leaflets less deeply cleft). 



