OF THE WASATCH REGION 45 



8. POTENTIL.LA. (Includes Drymocallis.) Cinque-foil. 



Herbs or rarely shrubs. Leaves compound; alternate or 

 opposite. Inflorescence cymose (or in some species solitary). 

 Flowers yellow, cream-color or white, with a deeply 5-cleft 

 calyx, 5 obcordate or broadly obovate deciduous petals, numer- 

 ous stamens, and numerous carpels that ripen into achenes. 

 Styles deciduous. Receptacle usually pubescent or hairy. 



Leaves pinnate; style lateral. 



Flowers pale yellow 1. P. glandulosa 



Flowers white or cream-color 2. P. micropetala 



Leaves digitately 5-7-foliate; styles terminal.... 3. P. grracilis 



1. P. glandulosa Lind. Stem erect; viscid and glandular- 

 hairy, irregularly branched above; 1-2 ft. high. Leaves pin- 

 nate; leaflets opposite, 7-9; obovate. Sepals lanceolate to ovate 

 with acute or rarely acuminate apex. Petals about length of 

 sepals; round or nearly so. Moist mountain valleys. May- 

 July. 



2. P. micropetala (Rydb.) (Drymocallis micropetala Rydb.) 

 Differing from No. 1 in the smaller flowers of a different 

 color. 



3. P. gracilis Dougl. Stems usually several, more or less 

 branched; silky-villous. Leaflets oblanceolate to narrowly ob- 

 ovate; green and sparingly pubescent above, densely white- 

 tomentose below. Flowers bright yellow, with emarginate 

 petals. (Includes P. Blaschkeana Turcz.; P. fastigiata Nutt. ; 

 P. filipes Rydb.; P. pulcherrima Lehm.) 



9. GEUM. Avens. 



Perennial herbs with pinnate or lyrate leaves. Calyx deeply 

 5-cleft, usually with 5 bractlets alternating with its lobes. 

 Petals 5. Stamens and carpels numerous. Styles becoming 

 elongated and sometimes plumose in fruit; often jointed; per- 

 sistent on the dry receptacle. 



1. G. macropliyllum Willd. (G. oregonense Rydb.) Bristly- 

 hairy, stout, 1-3 ft. high. Basal leaves lyrately and inter- 

 ruptedly pinnate, the terminal leaflet very much larger than 

 the 2-4 lateral ones. Petals yellow. Rich soil in moist places. 

 May-July. 



10. ROSA. Wild Rose. 



Bushy or climbing shrubs armed with thorns and prickles. 

 Leaves odd-pinnate, with adnate stipules. Inflorescence soli- 

 tary or corymbose. Flowers large and fragrant; white, pink 

 or red (rarely yellow). Calyx-lobes 5; petals 5; stamens 

 numerous, all borne around the edges of the globose or urn- 

 shaped receptacle. Carpels numerous, enclosed in the re- 

 ceptacle. Ovaries hairy. Fruit consists of the enlarged 

 receptacle (colored red), crowned by the persistent calyx, and 

 enclosing the achenes. 



Outer sepa\p laterally lobed 1. R. Woodsil 



Outer sepals entire 2. R. Nutknna 



