Horlcdia. ROSACES. 181 



16. HORKELIA, Cham. & Schlecht. 



Calyx campanulate. Petals obovate to linear, often unguiculate, white or pink. 

 Stamens 10 (20 in H. purpurascens), in two rows; filaments more or less dilated 

 and deltoid or subulate (often scarcely at all so in H. tridentata], those opposite to 

 the sepals broadest. Carpels few to many : styles nearly terminal, filiform or thick- 

 ened at base : ovules suspended. Akenes fixed by the middle to the nearly naked 

 receptacle. Otherwise as Potentilla. Herbaceous California!! perennials ; leaves 

 pinnate with several pairs of toothed or cleft leaflets, the upper ones confluent; 

 flowers cymose, mostly crowded. Gray, Proc. Am. Acad. vi. 528 ; Watson, Bot. 

 King Exp. 447. 



* Styles very short, thickened at base: bractlets narrow. 



1. H. fusca, Lindl. Glandular-pubescent: stems \ to 1J feet high: leaflets 6 to 

 8 pairs, cuneate-oblong to -ovate, incisely toothed or lobed, a half-inch to an inch 

 long : cymes usually dense ; bracts short : calyx about 2| lines long : petals cune- 

 ate-oblong, 2 lines long. Bot. Eeg. t. 1997. H. parviflora, Nutt. ; Torr. & Gray, 

 Fl. i. 435, with the leaflets mostly cuneate-obovate. H. capitata, Regel, Gartenfl. 

 1872, t. 711. 



Var. tenella, Watson. Low and slender : leaflets small, deeply lobed : flowers 

 small, scarcely 1^ lines long. 



Frequent in the Sierra Nevada, from Yosemite Valley northward to Oregon ; the variety in 

 Sierra County, Lemmon. 



2. H. capitata, Lindl. Very similar : leaflets often large : bracts broad and as 

 long as the flowers, which are somewhat larger ; petals 3 lines long : styles with 

 the thick base less cellular and firmer. Bot. Reg. under t. 1997. 



Collected in Oregon by Douglas, and in Klamath Valley by Cronkhite. It is perhaps but a 

 form of the last. 



* * Styles long and filiform, about equalling the stamens. 

 -f- Bractlets nearly as broad as the calyx-lobes. 



3. H. Californica, Cham. & Schlecht. Glandular-pubescent, the calyx often 

 somewhat villous with coarse hairs : stems a foot high or more : leaflets usually 5 

 to 10 pairs, cuneate-obovate to -oblong, toothed above, 3 to 8 lines long : flowers 

 usually crowded in the cymes, those in the forks on long pedicels ; bracts short : 

 calyx 3 to 6 lines long, about equalling the spatulate petals. Linnaea, ii. 26; Torr. 

 & Gray, Fl. i. 434. H. cuneata, Lindl. Bot. Reg. under t. 1997, a form with cune- 

 ate-rounded leaflets and smaller flowers. Potentilla multijuga, Lehm. Re vis. Potent. 

 29, t. 7, is probably the same. 



Yar. sericea, Gray. Canescent throughout with a dense silky pubescence : a 

 stout form, with leaflets sometimes 1| inches long. Proc. Am. Acad. vi. 529. 



Very frequent in the Coast Ranges from Los Angeles to San Francisco ; the variety in Alameda 

 County, Holder, Kellogg & Harford. 



-t- -H Bractlets much narrower than the calyx-lobes. 

 +4- Leaflets deeply incised or lobed. 



4. H. congesta, Hook. Villous with scattered stiff spreading hairs, glandular- 

 puberulent above : stems slender, a span or two high : leaflets 5 to 8 pairs, linear- 

 oblong, incised towards the apex, 6 to 9 lines long ; stipules many-parted : flowers 

 in a rather loose cyme ; bracts very short : calyx about 2 lines long, shorter than 

 the rounded limb of the petals. Bot. Mag. t. 2880 ; Torr. & Gray, Fl. i. 434. 



Oregon (Douglas, Hall) ; perhaps iu Northern California. 



