40 CISTACEiE. 



Shady woods. May— Aug. Stem 9 to 18 inche3 high, usually simple. Flowert 

 large, blue without, paler within; upper petals marked with blue lines; lateral 

 ones bearded. Flowering all summer. 



18. V. TRICOLOR, L. Pansy-Heartsease. 



Stem angular, diffuse; leaves oblong-ovate; loiver ones oblong cordate, deeply 

 crenate; stipules runcinately pinnatifid or lyrate, the terminal segments as large aa 

 the leaves ; spur short and thick. 



Gardens, where its pretty Cowers are earliest in spring and latest in autumn. 

 Flower* variable in size; the 2 upper petals purple; the 2 lateral white; and with 

 the lower striate at Laso: all yellow at base.. 



Y. odorata. Sweet Violet, 



Native of Europe. Flowers dark purple, very fragrant ; double by cultivation. 



2. SOLEA. G-ingens, DC. Green Violet. 



In honor of Win. Sole, author of an Essay on Mentha. 



Sepals scarcely equal, carinate, not auricled at the base r 

 decurrent into a pedicel, at length reflexed. Petals unequal, 

 the lowest one 2-lobed and somewhat gibbous at the base. 

 Stamens cohering, the lower 2 bearing a gland above the 

 middle. Capsule somewhat 3-sided. Seeds 6 to 8, very 

 large. — A homely perennial with green ish-tchiie flowers in the 

 axils of the leaves on short pedicels. 



1. S. CONCOLER, DC. Green Violet. 



Stem simple, erect ; leaves crenatc-lanceolate, sessile, irregularly toothed above ; 

 peduncles *hort, 2 to 3 flowered ; flowers small, greenish ; calyx nearly as long as tho 

 petals: spur none. 



Shady woods ; rare. April and May. Delaware and Franklin counties, and. 

 western parts of the State. Stem 2 to 4 feet high. 



Order 16. CISTACEJE. 



Herbs or low shrubs, loith regular flowers, distinct hypogynous stamens, and a 

 1-celled oio 5 valved pod. Leaves entire, opposite or alternate, usually feather- 

 veined. Flowers white, yellow, or red; very fugaceous, in 1-sided racemes. Sepals 

 5, persistent, unequal ; the 2 external small-like bracts, sometimes wanting. Pe- 

 tals 3 to 5, usually fugacious, convolute in the opposite direction from the calyx. 

 Stamens indefinite, hypogynous, distinct; anther innate. Style single or none, in 

 the bud. Ovules few or many, on slender stalks, with the orifice at the apex.. 

 Fruit capsular 1-celled, 3 to 5 valved, with as many parietal placentas borne on the 

 middle of the valves. 



1. HELIANTHEMUM. Tourn, Rock-rose. 



Gr. helios, the sun ; dnthos, a flower. 



Sepals 5, the 2 outer smaller, twisted in aestivation. 

 Petals 5, or rarely 3, sometimes abortive, crumpled in the 



