142 LEGUMINOSAE. 



203. ARGENTINA. 



Stoloniferous creeping herbs with pinnately compound leaves; 

 flowers axillary solitary; calyx deeply 5-lobed with 5 alternate 

 bractlets; petals yellow; stamens 20 or more; carpels numerous 

 on a small villous slightly concave receptacle; style filiform, 

 lateral ; akenes glabrous. 



Argentina anserina sericea (Hayne) Piper n. comb. (Potentilla anserina 

 sericea Hayne.) Villous herb, tufted and spreading by slender runners; 

 leaves all basal, pinnate; principal leaflets 3-10 pairs, white silky on both sides, 

 oblong, serrate; peduncles as long as or longer than the leaves; petals bright 

 yellow; akenes somewhat corky and grooved on the back. In moist spots 

 especially where alkaline. 



204. DRYMOCALLIS. 



Very similar to Potentilla' leaves pinnate; flowers yellow or 

 whitish; stamens in groups on a thick fleshy disk; anthers flat; 

 styles lateral, nearly basal; seeds ascending, orthotropous. 



Flowers cream-colored. D. convallaria. 

 Flowers bright yellow. 



Petals small, slightly if at all exceeding the sepals. D. glandulosa. 



Petals large, much exceeding the sepals. D. valida. 



Drymocallis convallaria Rydb. (D. corymbosa Rydb.) Perennial; stems 

 erect, stout, glandular- viscid and villous, 40-60 cm. high; basal leaves with 

 7-11 leaflets, these broadly obovate, cuneate at base, coarsely and somewhat 

 doubly dentate or incised, glandular-pubescent or glabrate; cauline leaves 

 with fewer leaflets; cyme usually dense, the branches erect; flowers 10-20 mm. 

 broad; calyx very glandular- viscid; bractlets shorter than the calyx-lobes; 

 petals broadly obovate, yellowish, barely exceeding the calyx-lobes; stamens 

 about 25. Common on hillsides. 



Drymocallis glandulosa (Lindl.) Rydb. Perennial; stems erect, 40-50 cm. 

 high, sparsely villous and glandular, loosely branched above; basal leaves 

 with 7-9 leaflets, these obovate or orbicular, simply or doubly dentate, sparsely 

 pubescent, 1-3 cm. long; cauline leaves usually with fewer leaflets; flowers 10- 

 15 mm. broad, in loose open cymes; calyx somewhat glandular; bractlets 

 shorter than the ovate acute or acuminate calyx-lobes; petals oval or obovate, 

 about as long as the sepals. Dry open woods. 



Drymocallis valida (Greene) Piper. Similar in habit to D. convallaria; 

 glandular-pubescent throughout; leaflets 7-11, mostly obovate to orbicular, 

 incisely serrate, 3-6 cm. long; cyme rather loose and flat-topped; petals elliptic 

 to suborbicular, one third longer than the sepals. In open pine woods, rare 

 in our limits. 



Family 36. LEGUMINOSAE. 



Herbs, shrubs or trees; leaves alternate, mostly compound, 

 with stipules ; flowers irregular (papilionaceous) (in ours) , perfect 

 or sometimes polygamous, in spikes, heads, racemes or panicles; 

 calyx 4-5-toothed or cleft; lobes equal or unequal, sometimes 

 2-lipped; petals more or less united or separate, perigynous or 



