200 Rosaceae 



at base of receptacle. Receptacle hemispheric with 

 numerous pistils which become dry achenes. Style 

 basal, slightly thickened and glandular below, tapering 

 at both ends or nearly filiform, rather persistent. Seed 

 attached near the base, ascending, orthotropous. 



1. D. glandulosa (Lindl.) Rydb. Stem erect, 3-6 dm. high, 

 rather slender, slightly striate, viscid and glandular hairy at 

 least above, nearly simple below, branched above ; lower stipules 

 lanceolate, the upper ovate and usually deeply toothed; basal 

 leaves petioled, pinnate ; leaflets 3-4 pairs, sparingly hairy, nearly 

 glabrous above, obovate, mostly obtuse, simply or doubly serrate 

 with broad teeth, 1-3 cm. long, the upper generally somewhat 

 larger; cauline leaves short petioled, with 1-3 pairs of leaflets; 

 flowers in an open many-flowered cyme, 10-15 mm. broad ; bract- 

 lets linear-lanceolate, much shorter than the oblong or obovate- 

 lanceolate acute sepals ; petals obovate, about equaling the sepals, 

 stamens 25. (Potentilla glandulosa Lindl.) 



Frequent in the chaparral belt in all our mountains. Ours not typical, 

 having usually smaller flowers and less acute sepals. March-July. 



2. D. glandulosa monticola Eydb. A more slender and 

 smaller mountain form with smaller leaflets, more open but 

 smaller cymes, shorter sepals, pale yellow petals, and often only 

 20 stamens. (Potentilla glandulosa Nevadensis Wats.) 



Frequent in the pine belt of all our mountains. May-August. 



7. HORKELIA Cham. & Sch. 



Perennial herbs with a thick woody caudex or root- 

 stock covered with brown scales, pinnate leaves and 

 cymose flowers. Calyx deeply campanulate to saucer- 

 shaped, deeply 5-lobed, with 5 bractlets alternating with 

 the lobes. Petals variable, unguiculate, white or rarely 

 pale yellow. Stamens 520, inserted in the throat of the 

 calyx-tube and remote from the base of receptacle ; fila- 

 ments dilated, petaloid. Receptacle hemispheric or 

 conic with numerous pistils. Styles long and slender, 

 generally thickened and somewhat glandular at base, 

 deciduous. Ovules and seeds pendulous, anatropous. 



