Trees, Shrubs and Vines 



79. Leather-flower. (Clematis viorna.) 



LEAF : pinnate (upper occasionally simple), opposite ; leaflets, 

 3-7, entire or 2-3-lobed, ovate-lance-shaped or oblong, base occa- 

 sionally slightly cordate. FLOWER : purple, large, single (no 

 corolla, sepals 4, i' long, very thick and leathery, more or less 

 grown together, pointed at apex, many stamens) ; May-August. 

 Pennsylvania, Ohio, and south ; climbing, herbaceous, stalk a little 

 grooved and ridged. (PI. VII.) 



80. Common Cinque-foil. Five-finger. (Potentilla 

 canadensis. ) 



LEAF : palmate ; leaflets, 5, i'-2', obovate, base wedge-shaped, 

 coarsely serrate toward apex. FLOWER : yellow (petals 5, 

 roundish, stamens numerous), single. April-July ; plant silky- 

 hairy, often trailing, herbaceous. (PI. VII.) 



8z. Wild Strawberries. (Fragaria vesca, virginiana, and 

 indica.) 



LEAF : trifoliate, clustered, radical, i.e., from the ground ; leaf- 

 lets, i'-2' long, obovate, base wedge-shaped, coarsely serrate, 

 stipules growing to base of leaf-stem. FLOWER : white (petals 5, 

 separate, roundish, stamens many), single on stem from ground ; 

 in spring ; with leafless runners ; in 2 species : vesca, with calyx 

 spreading or reflexed after blossoming, and the small seed-cases 

 on the surface of a rounded or conical receptacle ; virginiana, 

 calyx erect after flowering, seed-cases sunk into pits on roundish 

 receptacle. Another species (indicd), introduced, and locally 

 spontaneous near Philadelphia, has the runners leafy, petals yel- 

 low, leafy bracts larger than sepals below calyx, fruit tasteless. 



82. Running Buffalo Clover. (Trifolium stoloniferum.) 



LEAF : trifoliate ; leaflets, broad-obovate or reverse heart- 

 shaped, finely serrate ; long running stems. FLOWER : pur- 

 plish-white, in "heads" (like other clover), but not densely 

 flowered. Ohio, Illinois, and south ; trailing, herbaceous. 



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