252 OBDER 19. DROSERACE^E. 



6 D. filif6rmia Raf. Lvs. filiform, very long, erect ; scape nearly simple, longer 

 than the leaves, many-flowered ; petals obovate, erosely denticulate, longer than 

 the glandular calyx; sty. 2-parted to the base. Grows in wet, sandy places, 

 along the coast^fass. to Fla., much larger than the preceding species. The Ivs. 

 are destitute of a lamina, nearly as long as the scape, beset with glandular hairs, 

 except near the base. Scape about a foot .high, with large purple flowers. Aug., 

 Sept. 



5 D. linearis Goldie. Lvs. linear, obtuse ; petioles elongated, naked, erect ; scapes 

 few-flowered, about the length of the leaves ; cal. glabrous, much shorter than 

 the oval capsule ; seeds, oval, shining, smooth. Borders of lakes, Can., Mich, to 

 the Rocky Mts. (Hooker, Torr. & Gr.) Scape 36' high, with about 3 small 

 flowers. Lvs. about 2" wide, clothed with glandular hairs, which are wanting on 

 the petiole. Jl., Aug. 



2. DION>fcA, L. VENUS' FLY-TKAP. (One of the names of Venus.) 

 Sepals spreading ; petals 5, obovate, with pellucid veins ; stamens 

 10 15; styles united into 1, the stigmas many-cleft; capsule break- 

 ing irregularly in opening, 1 -celled ; seeds many in the bottom of the 

 cell. If Glabrous herbs. Lvs. all radical, sensitive, closing convul- 

 sively when touched. Scape umbeled. 



D. nruscipula Ell. A very curious plant, native of sandy bogs in Car., along 

 rivers from the Neuse to the Santee. Sometimes cultivated in a pot of bog earth 

 placed in a pan of water. Lvs. rosulate, lamina roundish, spinulose on the mar- 

 gins and upper surface, instantly closing upon insects and other objects which 

 light upon it. Scapo 6 12' high, with an umbel of 8 10 white flowers. Apr.. 

 May. f 



SUBOBDER, PARNASSIEJE, 



Consists of the single genus Parnassia, which differs from the Sundews in having 

 5 sets of abortive stamens and the 4 stigmas placed over the parietal placentae (as 

 if each stigma were compounded of the two adjacent halves of two divided 

 Eti.Tmas. More recently this genus is stationed among the Saxifrages. 



3. PARNASSIA, Tourn. GRASS OF PARNASSUS. (Named from 

 Mount Parnassus, the abode of the Muses, Graces, &c.) Sepals 5, 

 united at base, persistent ; petals 5, persistent, nearly perigynous ; sta- 

 mens in two series, the outer indefinite in number, united in 5 groups, 

 sterile, the inner 5 perfect; capsule 1-celled, 4-valved; seeds very nume- 

 rous with a winged testa. 4 Glabrous herbs, with radical Ivs. and 1- 

 flowercd scapes. 



1 P. Caroliniana L. Sterile fit., 3 in each group, distinct to near the base, sur- 

 x mounted with little spherical heads ; pet. much exceeding the cal, marked with 



green veins ; Ivs. radical, or sessile on the scape, broad, oval, with no sinus at 

 the base. An exceedingly elegant and interesting plant, growing in wet mea- 

 dows and borders of streams, U. S. to Can. Rt. fibrous. Lvs. 7 -veined, broad- 

 oval or ovate, smooth, leathery, radical ones long-stalked, the cauline only one, 

 sessile, clasping, a few inches above the root. Scapes 10 15' high, with a 

 handsome, regular flower about 1' diam. Jn. Aug. 



P. Filments nearly as long as the petals ; cauline leaf small or none ; rhizomo 

 thick and large. Fla. (Chapman.) 



2 P. palustris L. Sterile fil. pellucid, setaceous, 9 to 15 in each set; cauline 1C, 

 if any, sessile ; radical Ivs. all cordate. Bogs and lake shores, Mich, to Lab., and 

 W. to Rocky Mts. Scapes about 6' high, naked or with a single clasping leaf 

 near the base. Fls. white. Sepals oblong-lanceolate. Petals marked with 3 5 

 green or purple veins. 



3 P. asarifolia Vent. Sterile fil., 3 in each set; petals abruptly clawed ; fr.s 

 reniform. Mts., Va. and Car. Lvs. large (1 2' broad), the cauline one sessile, 

 orbicular. Fls. 1J' diam. 



