ROSACEA 355 



p. frnticdsa, Linn. Stem erect (1-2 ft.), shrubby, diffusely branched: 

 leaves pinnate, with 5-7 sessile leaflets, margins entire, revolnte: flowers 

 axillary: petals yellow, orbicular, and longer than calyx, 1 in. broad. 

 Marshy and wet ground. June to September. 



2. GfiUM. AvENS. 



Perennial, erect herbs, with odd-pinnate or lyrate leaves, with stipules: 

 flowers resembling those of Potentilla: calyx 5-cleft with five alternate 

 bracts: stamens, many: akenes numerous, aggregated on a conical recep- 

 tacle, with long persistent styles jointed, or bent, or plumose. 



G. rivals, Linn. Stems erect, 1 to 2 ft., several-flowered: root leaves 

 lyrate, and irregularly pinnate, petioled: stem leaves few, usually of 3 

 leaflets, or 3-lobed: flowers few, large, nodding, the calyx purplish, the 

 petals clawed, erect, yellowish-purple: styles purplish, jointed and bent in 

 middle, stigmas plumose: fruit stalked in the calyx. May to July. Bogs. 



G. Alburn, Gmelin. From 2 to 3 ft., with stem erect, branching, smooth 

 or downy: root leaves of 3-5 leaflets, or simple with smaller leaflets at 

 base: stem leaves few, simple, lobed, or 3-divided or toothed and short- 

 petioled: flowers whitish, the petals not longer than sepals: head of 

 fruits sessile in the calyx: styles jointed and bent near middle, the upper 

 part hooked: torus bristly. Late spring and summer, 



G. Virgini&,num, Linn. Differs from preceding in being hirsute: root- 

 leaves various, but pinnate, with a very large rounded terminal leaflet; the 

 upper leaves mostly 3-parted: flowers white or pale yellow: receptacle 

 not bristly: heads of fruits on short, stout, hairy stalks. Low ground. 

 Summer. 



3. AGRIMONIA. Agrimony. 



Perennial, erect herbs, with alternate odd-pinnately compound leaves, 

 and slender, spike-like racemes, with yellow flowers: leaves wiib small 

 segments intersposed, and large dentate stipules: calyx-tube contracted at 

 the throat with a 5-eleft limb, and bristly on upper part: petals 5: stamens 

 slender, 5-15, carpels 2, styles terminal: fruit dry, included in the prickly 

 calyx-tube. 



A. Eupatdria, Linn. Spicate raceme terminating the stem (G in. to 2 

 ft. higli): petals yellow and twice longer than the 

 calyx. Dryish soils. Summer. 



4. FRA6ARIA. Strawberry. ^-^--^'S 



Low perennials with 3 broad-toothed leaflets and ^^^^^Sm 

 a few flowers on radical peduncles: torus enlarging in -, 

 fruit, usually becoming fleshy. 



F. v6sca, Linn. Fig. 474. Small, very sparsely 

 hairy, the leaves thin and rather light green, very 

 sharply toothed: flower-clusters overtopping the foli- 

 age, small and erect, forking: fruit slender and pointed, 474. Fragaria vesca. 



