180 XIX. CISTACER. LEcHEA, 
2, DIONAA. Ellis. 
Dionea is one of the names of Venus. 
Sepals 5, ovate, oblong, spreading ; petals 5, obovate, with pellucid 
veins ; stamens 10—15; style 1; stigmas 5, connivent, many-cleft ; 
capsules indehiscent, breaking irregularly, l-celled, many-seeded— 
2% glabrous. Lws. radical, sensitive, closing convulsively when touched. 
Scape wmbellate. 
D. Musciptua. Ell. Venus’ Fly-trap.—Native of the Southern States. Some- 
times cultivated in a pot of bog earth placed in a pan of water. Leaves rosu- 
late, lamina roundish, spinulose on the margins and upper surface, instantly 
closing upon insects and other objects which light upon it. (See Part I. § 248.) 
Scape 6—12’ high, with an umbel of 8—10 white flowers. Apr. May. f 
3. PARNASSIA. Tourn. 
Named for Mount Parnassus, the abode of the Muses, Graces, &c. 
Sepals 5, united at base, persistent; petals 5, persistent, nearly 
perigynous; stamens perigynous, in 2 series, the outer indefinite in 
number, united in 5 groups, sterile, the inner 5 perfect; capsule 1- 
celled, 4-valved ; seeds very numerous, with a winged testa.—% herbs 
with radical lvs. and \-flowered scapes. 
1. P. CarouiniAna. Grass of Parnassus. 
Sterile filaments in 5 clusters, 3 in each, distinct to near the base, sur- 
mounted with little spherical heads; pet. much exceeding the calyx, marked 
with green veins; Jus. radical or sessile on the scape, broad-oval, with no sinus 
at the base.—An exceedingly elegant and interesting plant, growing in wet 
meadows and borders of streams, U. S. to Can. Root fibrous. Leaves about 
7-veined, broad-oval or ovate, smooth, leathery, radical ones long-stalked, cau- 
line ones sessile, clasping, a few inches above the root. Scapes about 1f high, 
with a handsome regular flower about 1’ diam. Jl. Aug. 
2. P. PALUSTRIS. 
Lws. all cordate, the cauline one (if any) sessile; scales (bundles of sterile 
stamens) smooth, with numerous slender, pellucid sete.—Bogs and lake shores, 
Mich. to Lab. and W. to the Rocky Mts. Scapes about 6’ high, naked or with 
a single clasping leaf near the base. Flowers white. Sepals oblong-lanceo- 
late. Petals marked with 3—5 green or purple veins. Each scale is distin- 
guished by 10—15 whitish hair-like bristles. 
Orver XIX. CISTACEHA.—Rock Rosszs. 
Plants herbaceous or shrubby. Branches often viscid. 
Lvs. entire, wrponte or alternate, usually feather-veined. 
Fis. white, yellow, or red, very fugacious, in one-sided racemes. 
Cal.—Sepals 5, unequal, the 3 inner with a twisted estivation. 
Cor.—Petals 5, hypogynous, crumpled in estivation. 
Sta. indefinite, hypogynons, distinct. Anth. innate. é : 
Ova. distinct, or many-celled. Sty. single. Stig. simple. [ceeding from the middle of the valves. 
Fr. capsular, either 1-celled with parietal placente, or imperfectly 3—5-celled, with dissepiments pro- 
Genera 7, species 185, found most abundant in the north of Africa or south of Europe. They possess 
no interest on account of their properties. 
Conspectus of the Genera. 
large and showy,or wanting. . .  . - 6 (es «lee Helianthemum. 2 
Petals 5,? minute. Delicate shrubs. . ; : E 7. ow | Se i EE ie eee 3 
Petals 3, linear-lanceolate. . : tb «+ « Lechea. 1 
1. LECHEA. 
In memory of John Leche, a Swedish botanist. 
~ Sepals 5, the 2 outer minute ; petals 3, lanceolate, small; stamens 
3—12; stigmas 3, scarcely distinct; capsule 3-celled, 3-valved ; pla- 
centz nearly as broad as the valves, roundish, each 1—2-seeded —% 
Suffruticose, branching plants. Stipules 0. 
