126 DICOTYLEDONOUS. 



1. C. Americana. Stem twining, filiform, resembling orange-colored 

 threads, springing first from the earth, afterwards becoming parasitic; the 

 root dying. Leaves none. Flowers in racemose clusters. Love Vine. 



White. # Through the Summer. Common. 



Genus IV. DICHONDRA. 



Calyx 5-parted, segments spatulate. Corolla 5-partecl, 

 bell-form, short. Stamens 5. Stigmas 2. Capsule 2-celled, 

 formed of 2 carpels, each 1 -seeded. Seeds globose. 



1. D. Carolinaensis. Stem creeping, pubescent. Leaves somewhat ren- 

 iform, emarginate. Calyx cihate, villous. 

 Purple. % June. Louisiana. 



Order LXVIII. POLEMONIACE.E. 



Calyx 5-parted, persistent, sometimes irregular. Corolla 

 regular, 5-lobed. Stamens 5, inserted into the middle of the 

 tube of the corolla, and alternate with its segments. Ovary 

 superior, 3-celled. Style simple. Stigma tritid. Capsule 3- 

 celled, dehiscence loculicidal. Seeds angular or oval, ascend- 

 ing ; embryo straight ; cotyledons foliaceous. Herbaceous 

 plants. 



Genus I. PHLOX. 



Calyx prismatic, deeply 5-cleft. Corolla salver form, with 

 a flat 5-lobed border, lobes cuneate. Stamens unequal, insert- 

 ed into the tube of the corolla. Capsule ovate, 3-celled, 1 

 seed in each cell. 



1. p. Acuminata. Stem erect, little scabrous towards the summit, smooth 

 towards the base. Leaves membranaceous, scabrous, lower ones spatulate- 

 ovate, acuminate, upper ones lanceolate. Flowers in terminal corymbs ; seg- 

 ments of the calyx subulate, awned ; segments of the corolla rounded. 



Purple. % August — Sept. Common in the upper country. 3-5 ft. 



2. P. Paniculata. Stem smooth, erect. Leaves opposite, lanceolate, flat> 

 with scabrous margins, acuminate. Flowers in numerous opposite corymbs ; 

 segments of the calyx pubescent, awned. Anthers linear, 2-celled. Stigma 

 hispid. 



Purple. % June — July. Upper districts Car. 2 ft. 



3. P. Undulata. Stem erect glabrous. Leaves oblong-lanceolate, undu- 

 late, wiih scabrous margins. Flowers in paniculate corymbs ; segments of 

 the calvx awned, those of the corolla retuse. 



Bliie. % July— Aug. Mountains. 2-3 ft. 



4. P. PYRAivnDALis. Stem erect, scabrous. Leaves cordate-ovate, acute- 

 Flowers in pyramidal, fastigeate panicles ; segments of the calyx lanceolate, 

 acute, those of the corolla cuneate, truncate. 



Purple. % June — Aug. Mountains. 



5. P. Coed ATA. Stem erect, glabrous. Leaves cordate tapering towards 

 the summit, auricled at the base, with scabrous margins. Flowers in some- 

 what paniculate corymbs, numerous, segments of the calyx awned, ae long 

 as the tube. 



Blue. % August. Upper district(* Car. 1-2 ft. 



