15. V. striàta, Ait. (PALE V.) Stems angular, ascending (6--10´ high); leaves heart-shaped, finely serrate, often acute; stipules oblong-lanceolate, large; _spur thickish, much shorter than the cream-colored or white petals_, the lateral ones bearded, the lower striped with purplish lines; stigma beaked.--Low grounds, W. New Eng. to Minn. and Mo., and southward in the mountains. April--Oct. 16. V. rostràta, Pursh. (LONG-SPURRED V.) Stems ascending (3--6´ high); leaves roundish-heart-shaped, serrate, the upper acute; stipules lanceolate, large; _spur slender_ (½´ long), _longer than the pale violet beardless petals_; style straight and slender; stigma terminal, beakless.--Shaded hillsides, N. New Eng. to Mich., and southward in the Alleghanies; rather rare. June, July. 17. V. canìna, L., var. Muhlenbérgii, Gray. (DOG V.) Low (3--8´ high), mostly glabrous; stems ascending, mostly simple, from the base at length producing creeping branches; leaves heart-shaped, or the lowest kidney-form, crenate, the uppermost slightly pointed; stipules lanceolate; _spur cylindrical, half the length of the light violet petals_, the lateral ones slightly bearded; stigma beaked.--Damp or wet shady places; common. May--July. (Eu.)--Var. PUBÉRULA, Watson in herb. Finely puberulent; leaves mostly ovate and acutish with a cordate base, often small; flowers small and mostly cleistogamous.--Sandy or stony shores and islands of Lakes Huron and Superior. (_Robbins, Engelmann, etc._)--Var. MULTICAÙLIS, Gray. Depressed and stoloniferous; flowers mostly cleistogamous; leaves small, suborbicular to reniform.--Ky. to Fla. and Tex. § 2. _Leaf-bearing throughout from an annual, biennial, or sometimes short-lived perennial root; the stipules large, leaf-like and lyrate-pinnatifid._ V. TRÍCOLOR, L. (PANSY. HEART'S-EASE.) Stem angled and branched; leaves roundish, or the upper oval and the lowest heart-shaped, crenate or entire; petals variable in color or variegated (yellow, whitish, violet-blue and purple);--in var. ARVÉNSIS shorter or little longer than the calyx.--Dry or sandy soil, N. Y. to Iowa, Kan., and southward; the variety sometimes seeming like a native plant. April--Sept. (Nat. from Eu.) 2. SÒLEA, Spreng., in part. GREEN VIOLET. Sepals not prolonged at the base. Petals nearly equal in length, but the lower one larger and gibbous or saccate at the base, more notched than the others at the apex. Stamens completely united into a sheath enclosing the ovary, and bearing a broad gland on the lower side. Style hooked at the summit.--A homely perennial herb, with stems leafy to the top, and 1--3 small greenish-white flowers in the axils, on short recurved pedicels. (Named in honor of _W. Sole_, author of an essay on the British Mints.) 1. S. cóncolor, Ging. Plant 1--2° high; leaves oblong, pointed at both ends, entire; pod 1´ long.--Woods, N. Y. to Kan., and southward. June. 3. IONÍDIUM, Vent.