Dicotyledones. 6i 



FUSE CINQUEFOIL. Flowers yellow in loose, leafy cymes. Diffuse, rather weak 

 annual, 6 inches to 3 feet high. Leaves, all but the uppermost, 3-foliate and peti- 

 oled. Leaflets thin, oblong, incisely serrate. Styles thickened below. In damp 

 soil. 



5. Potentilla Anserina, L. (L., anserinus, pertaining to geese.) Silver- 

 weed. Flowers yellow, solitary and axillary. Herbaceous and tufted, spreading 

 by slender runners. Leaves pinnate; leaflets 7-25, oblong to obovate, serrate, 

 white-pubescent beneath. Style filiform. River banks, lake borders, etc. 



6. Potentilla Canadensis, L. Common Cinquefoil or Five-finger. 

 Flowers yellow, solitary and axillary. Stems tufted, and spreading by slender 

 runners. Leaves digitately 5-foliate, sometimes 3-4-foUate, petioled. In dry soil. 



Vn. WALDSTEIWIA. 



(Named for Francis von Waldstein.) 



Perennial herbs resembling the strawberry, but with yellow flowers 

 and 2-6 carpels inserted on a short receptacle. Flowers corymbose on 

 bracted scapes. Petals conspicuous and stamens numerous. 



1. Waldsteinia fragarioides, Tratt. (L. fraga, strawberries ; Gr., eidos, resem- 

 blance.) Barren or Dry Strawberry. Leaves on long petioles, tufted, 

 mostly 3-foliafe; leaflets obovate-cuneate, dentate, crenate, or incised. Scapes 

 corymbosely 3-8-flowered; pedicels slender and sometimes drooping. Wooded 

 hillsides. 



VIII. GEUM. Avens. 



(Ancient Latin name.) 



Perennial herbs, with pinnatifid or odd pinnate, stipulate leaves ; 

 basal leaves clustered, stem leaves smaller. Calyx somewhat campanu- 

 late, 5-lobed, usually with 5 bractlets at the sinuses. Petals 5, exceed- 

 ing the calyx. Stamens many, inserted on the disk below the calyx. 

 Carpels many, on an elevated, dry receptacle. Styles persisting in the 

 form of hairy, naked, or jointed tails to the achenes. 



1. Geum rivale, L. (L., rivalis, belonging to a brook.) PURPLE or Water 

 AvENS. Flowers purple and nodding, calyx lobes erect or spreading. Erect, i to 

 3 feet high, pubescent. Basal leaves lyralely, interruptedly pinnate; stem leaves 

 3-lobed or 3-pinnate. Achenes very pubescent ; style jointed, and plumose below. 

 In wet meadows and swamps. 



2. Geum ciliatum, Pursh. (L., c/Z/aw, an eyelash.) Long-plum fd Purple 

 AVENS. Flowers light purple ; styles very long and plumose throughout. Scapose, 

 pubescent herbs, 6 to 18 inches tall. Scapes 3-8-flowered. Basal leaves tufted, 

 pinnate, leaflets very numerous and cut-toothed. In rocky soil. 



3. Geum album, Gmel. (L., albus, white.) White Avens. Flowers white, 

 less or more than \ inch broad. Plants softly pubescent or nearly glabrous, t\ to 



