317 



streams. Ja-Ap. 



Type locality: "SF, Cal." 

 Parsons, W Fls Cal 26. 



Genus PRUNUS Tournefort. 



Trees or shrubs with alt decid or 

 evergreen usually serrate Ivs and w or 

 rose-Qolored fls in terminal or axy ra- 

 cemes or corymbs: ex campanulate or 

 turbinate, 5-cleft, decid: pet 5, spread- 

 ing: sta 15-25, inserted with the pet: 

 ova solitary, free; sty terminal; ovules 

 2, pendulous: fr a more or less fleshy 

 drupe with a berry stone; sds 1 or rare- 

 ly 2. Cherry. 

 PRUNUS DEMISSA Walp. 



Shrub, 1-4 m hi; Ivs ovate or oblong- 

 ovate, acute or acuminate, rounded or 

 cordate at base, sharply serrate, more 

 or less pubescent beneath, 5-10 cm long, 

 with 1 or 2 glands at the base of the 

 blade; racemes 5, terminal, 7-10 cm 

 long, many-fld; drupe globose, r or p, 

 astringent; stone globose. 



Choke cherry. Mts SD Co to the Co- 

 lumbia river. Rocky Mts. 



Abrams, Fl LA 204. SBer mts. 



Hall, U 88. 



Parsons, W Fls Cal 36. 



Cerasus demissa Nuttall, T & G Fl 

 1:411. Watson, bot King Exp 80. 



Prunus Virginiana var demissa Tor- 

 rey, bot Wilkes 284. Gray Am ac pr 

 8:381. 

 FBTJNUS ILICIFOLIA Walp. 



Shrubby or arborescent, 3-6 m hi, 

 bark grayish brown; Ivs coriaceous, 

 glossy above, glabrous throughout, ovate 

 to ovate-lanceolate, coarsely spinose- 

 toothed, 2.5-5 cm long, on short petioles; 

 racemes axillary, 2.5-5 cm long If-less: 

 fls sm; drupe 1 cm long or more, thick, 

 slightly obcompressed, sweetish, scarce- 

 ly astringent. 



Abrams Fl LA 204. 



Brandegee, Zoe l:lil. Cat. 



Brewer & Watson, bot Cal 1:168. 



Parsons, W Fls Cal 63. 



Cerasus ilicifolius Nuttall, Sylva 

 2:16 t 47. H & A, bot Beechey 340 t 83. 



Genus DRYMOCAI^LIS Tourn. 



Eerect more or less glandular or viscid 

 herbs from per rt-stocks, with pinnate 

 Ivs and cymose y 5-merous bracteolate 

 fls: ex saucer-shaped or hemispheric: 

 pet obovate, elliptic or nearly orbicular, 

 obtuse: sta 20-30 on a persistent disk at 

 base of receptacle: receptacle hemispher- 

 ic with num pistils which become dry 

 akenes: sty basal slightly thickened and 

 glandular below, tapering at both ends 

 or nearly filiform, rather persistent: sd 

 attached near the base, ascending, or- 

 thotropous. 

 DRYMOCALLIS GLANDTTLOSA Rydb. 



St erect, 3-6 dm hi, rather slender, 

 slightly striate, viscid and glandular 

 hairy at least above, nearly simple be- 

 low, branched above; lower stipules lan- 

 ceolate, the upper ovate and usually 

 deeply toothed; basal Ivs petioled, pin- 

 nate: Ifts 3-4 pairs, sparingly hairy, 

 nearly glabrous above, obovate, mostly 

 obtuse, simply or doubly serrate with 

 broad teeth, 1-3 cm long, the upper gen- 

 erally somewhat larger; cauline Ivs 

 short petioled, with 1-3 pairs of Ifts; 



318 



fls in an open many-fld cyme, 10-15 mm 

 broad; bractlets linear-lanceolate, much 

 shorter than the oblong or obovate-lan- 

 ceolate acute sep; pet obovate, about 

 equaling the sep, sta 25. Wash to 

 SD Co! 



Abrams, Fl LA 200. Frequent in the 

 chaparral belt in all our mts. Ours not 

 typical, having usually smaller fls and 

 less acute sep. Mr-Jl. 



Potentilla glandulosa Lindl, bot reg 

 19 t 1583 (1833). 



Type locality: "California." 



Greene, Erythea 1:5. Pacific coast. 



Davidson, Erythea 2:30. .Cat I. 

 Variety MONTICOLA Rydb. 



A more slender and smaller mountain 

 form with smaller Ifts, more open but 

 smaller cymes, shorter sep, pale y pet, 

 and often only 20 sta. 



Abrams, Fl LA 200. Frequent in the 

 pine belt of our mts. My-Ag. 



Rydb, mon NA Pot 199 (1898). 



Potentilla glandulosa var. Nevaden- 

 sis Watson. 



Hall, U 87. 



Genus ARGENTINA Lam. 



Per herbs growing in damp ground 

 and spreading by slender runners, sts 

 thick and fascicled, Ivs pinnate: fls 

 borne on simple pedicels from ax of the 

 Ivs formed on the runners, anth 5, 

 bractlets 5: ex nearly wheel-shaped: pet 

 y, broadly elliptic to nearly orbicular, 

 obtuse: sta 20-25, inserted closely 

 around the base of the receptacle; fll 

 filiform, rather short: receptacle hemis- 

 pheric, bearing num pistils, these be- 

 coming dry ak in fr: sty filiform, lat- 

 eral, attached at the middle of the ova, 

 somewhat peristent: sds ascending and 

 amphitropous. 

 ARGENTINA ANSEJtINA Rydb. 



Main st inconspicuous, producing num 

 long runners; Ivs 1-2 dm long, abruptly 

 pinnate with 9-31 larger Ifts and with 

 smaller ones interposed, usually pros- 

 trate, slightly silky and g above, w- 

 silky and tomentose beneath; larger Ifts 

 oblanceolate, 1-3 cm long, deeply and 

 sharply serrate; fls 1-2 cm broad, on 

 pedicels 3-20 cm long, pet much exceed- 

 ing the ex. 



Abrams, Fl LA 199. "Rather common 

 in damp ground in the valleys. Flower- 

 ing through the summer." 



Potentilla Anserina L. 



Cockerell, W Am Sci 5:11. 



Brewer & Watson, bot Cal 1:180. 



Parsons, W Fls Cal 179. 

 Genus POTEVTILLA Linnaeus. 



Ours per or rarely ann herbs with 

 digitately or pinnately compound Ivs 

 and cymose y perfect fls: ex persistent, 

 its tube concave or hemispheric, 5-bract- 

 eolate, 5-lobed: pet 5, mostly obovate 

 and emarginate: sta commonly 20, in- 

 serted on an annular disk very near the 

 base of the receptacle; fil filiform or 

 spatulate but not flattened: pistils many, 

 becoming dry ak in fr, inserted on a 

 hemispheric or conic receptacle: sty ter- 

 minal or nearly so, decid; ovules pen- 

 dulous, anatropous. 

 POTENTILLA MTJLTIJTJGA Lehm. 



Per; sts erect, 3-7 dm hi, slightly 



