ROSACES. (ROSE FAMILY.) 123 



1. A. arvensis, L. Annual, hairy; stem (l'-8'high) leafy; leaves 3- 

 parted, the divisions wedge-shaped, 3 - 5-lobed ; flowers in axillary sessile clus- 

 ters ; fertile stamens 1-2. Waste places, North Carolina and Virginia. In- 

 troduced. Stem branching .from the base. Leaves 4" -6" long. 



9. GEUM, L. AVENS. 



Calyx campanulate, deeply 5-cleft, and usually with as many bracts at the 

 sinuses. Petals 5. Stamens and achenia numerous, the latter crowded on the 

 conical or cylindrical dry receptacle. Styles terminal, long, persistent, jointed 

 and hairy, or straight and smoothish. Seeds erect. Perennial herbs, with pin- 

 nately divided leaves. Flowers yellow, white, or purple. 



1. G. album, Gmelin. Smoothish or downy ; stem slender, with spreading 

 branches ; radical leaves pinnate, or the earliest ones nearly simple and rounded ; 

 stem-leaves 3-parted, lobed or toothed ; petals white, as long as the calyx ; style 

 jointed and bent near the middle, the smooth lower portion persistent and hooked ; 

 receptacle and ovaries bristly-hairy. Rich woods, Georgia and northward. April 

 and May. Stem 2 high. 



2. G. geniculatum, Michx. Hairy ; leaves pinnate, 3-parted or 3-lobed, 

 the upper ones nearly sessile ; leaflets or lobes thin, ovate and obovate, toothed 

 and serrate ; style jointed and bent in the middle, the upper portion plumose 

 and nearly persistent, the lower pubescent, or smooth above ; heads of the hairy 

 achenia sessile. High mountains of North Carolina. July. Stem 2 - 3 

 high. Flowers white, veiny. 



3. G. radiatum, Michx. Hirsute; stem short (6' -12'), often branching; 

 lowest leaves pinnate, the terminal leaflet large, reniform, obscurely lobcd, 

 doubly toothed, the lateral ones few and small ; stem-leaves scattered, small, 

 sharply toothed, sessile ; flowers large ; petals obcordate, yellow ; style straight 

 and wholly persistent, hairy at the base ; heads of achenia sessile. Highest 

 mountains of North Carolina. July. Flowers 1 ' wide. 



10. WALDSTEINIA, Willd. 



Calyx obconical, 5-cleft, with as many alternate bracts. Petals 5. Stamens 

 numerous, inserted into the throat of the calyx. Achenia 2-6, dry or some- 

 what fleshy. Style terminal, filiform, separating from the achenium by a joint. 

 Seeds erect. Low perennial herbs, with chiefly radical and roundish lobed 

 leaves, and yellow flowers on scape-like steins. 



1. W. fragarioides, Tratt. Smooth or hairy; leaves long-petioled, tri- 

 foliolate or 3-parted, with broadly cuneate and crenately toothed leaflets ; scape 

 as long as the leaves, bracted, many-flowered ; achenia 4-6, minutely hairy. 

 Mountain-woods, Georgia and northward. May and June. Stem and leaves 

 4' - 6' high. Petals larger than the calyx. 



2. W. lobata, Torr. & Gray. Hairy ; leaves cordate, crenately 3 - 5-lobed ; 

 scape filiform, bracted, 4 - 8-flowered ; achenia mostly 2, hoary; petals rather 



