26 DIALYPETALOUS EXOGENS 



6. V. petlata, L. Leaves pedately lobed, the lobes linear or 

 narrowly oblong ; petals all beardless. 

 PEDATE VIOLA. Bird-foot Violet. 



Leaves exactly pedate, about 7-parted. Scapes numerous, 3 to 6 or 8 inches high, 

 finally a little longer than the leaves. Flowers large, pale blue, or sometimes va- 

 riegated, and showy. 

 Hob. Dry, slaty hills: frequent. Fl. April. Fr. June. 



f f LEAFY-STEMMED : * Flowers pale purple, or whitish. 



T. V. M uhlenbergii, Torr. Leaves roundish-cordate, or reni- 

 form, crenate; spur tapering, straight; petals pale violet. 

 V. Muhlenbergiana. Ging. $ Fl. Cestr. ed. 2. p. 146. 

 MUHLENBERG'S VIOLA. Spreading Violet. 



Stem 2 or 3 to 8 or 10 inches long, often much branched from the base, assurgent, 

 finally procumbent. Leaves about an inch long, petiolate. Peduncles axillary, 

 longer than the leaves ; flowers rather small. 

 Hob. Low, swampy grounds : frequent. FL May. Fr. July. 



8. V. st ri iita, Ait. Leaves cordate, acute, serrate ; spur thick- 

 ish, slightly curved; petals cream-colored. 



V. ochroleuca. Schw. $ FL Cestr. ed. 2. p. 146. 

 STRIATE VIOLA. 



Stems 5 to 10 or 12 inches high, nearly erect, often growing in bunches. Leaves 

 1 to 2 inches long, on petioles of the same length, with large fringed stipules, 

 Peduncles axillary, twice as long as the leaves. Flowers rather large, the lateral 

 petals densely bearded. 



Hub. Low grounds; Brandy wine: not common. FL May. Fr. July. 

 * * Flowers yellow. 



9. V. piibcsceiis, Ait. Softly pubescent; leaves broadly cor- 

 date or ovate, dentate ; spur very short. 



PUBESCENT VIOLA. Downy Yellow Violet. 



Stem 6 to 12 inches high, generally erect and solitary, and leafless below the 

 summit. Leaves 2 to 4 inches long, usually 3 of them at or near the summit of the 

 stem, petiolate. Peduncles 2 or 3, rather shorter than the leaves. 

 Hob. Dry, open woodlands : common. Fl. May. Fr. July. 



Obs. The V. scabriuscula, Schw. with straggling decumbent stems, 

 is generally regarded as a variety, only, of this. 



ORDER XIII. CISTACEAE. 



Herbs, or suffruticose plants ; leaves simple, the lower usually opposite, the upper 

 alternate, with or without stipules; flowers regular; stamens many or few, distinct, 

 hypogynous ; capsule 1-celled, 3- to 5-valved, each valve bearing a parietal placenta 

 in the middle ; seeds orthotropous ; embryo slender, in mealy albumen. 



45. IIEMAIV'TIIEMUM. Tournef. 



[Gr. Helios, the sun, and anthemon, a flower ; sunshine flowers.] 

 Petals 5 (sometimes wanting), spirally imbricated or crumpled in 

 the bud, fugacious. Stamens indefinite. Capsule 1-celled, 3-valved, 

 many- or few-seeded. 



1. H. C'aiiiuK'iise, MX. Petal-bearing flowers large, solitary, 

 the others small, in axillary hoary clusters. 

 CANADIAN HELIANTHEMUM. Rock Rose. Frost-weed. 



