CONVOLVULACE^. 295 CALTSTEGIA, 



1. C. arve'nsis. 



Leaves sagittate-hastate, the lobes being acute ; peduncles mostly 1 -flowered; 

 bracts minute, remote from the flower. A twining plant, growing in fields 

 and pastures. Stems several feet long, climbing or prostrate, a little hairy. 

 Leaves 1 — 2 inches long, the lower ones obtuse. Flowers small, white, often 

 with a tinge of red. The small, acute bracts are near the middle of the 

 peduncle. June. Per. Small Bindweed. 



2. C. pandura'tus. 



Stem twining; leaves broad-cordate or panduriform ; peduncles long, 1 — 4- 

 flowered ; ca/i/x smooth ; coro/Za tubular campanulate. In sandy fields, N. Y. 

 Stems several from the same root, 4 — 8 feet long, slender, smooth. Leaves 

 2 — 3 inches long and of about the same width, acute or obtuse, with rounded 

 lobes at the base, sometimes lobed and hollowed on the sides and becoming 

 fiddle-shaped. Petioles 2 — 3 inches long. Peduncles axillary, longer than 

 the petioles, generally branching at the top, and bearing several large flowers. 

 Corolla 2 inches long, purple and while. Jl., Aug. Per. JVild Potatoe. 



3. C. PURPU'REA. L. (Ipomffia purpurea. P.) — Leaves cordate, en- 

 tire ; /rMji nodding; peduncles 2 — 5-flowered ; pedicels thick; calyx hispid. 

 Stems climbing many feet. Leaves roundish, heart-shaped. Flowers large, 

 beautiful, generally of a dark purple, sometimes blue, flesh colored, striped, 

 &c. A well known and favorite climber and free flower, of the easiest cul- 

 ture. Native at the South and West. Jn. Ann. Common Morning-glory, 



4. C. TRl'COLOR. — Leaves lanceolate, ovate, smooth ; siem declinate ; 

 flowers solitary. A favorite border annual, the C. minor of florists, in distinc- 

 tion from C. purpureus, which they call C. major. Stem weak, ] — 3 (eet 

 long. Flowers yellowish at the bottom, white in the middle, and of a fine 

 sky blue on the upper part of the border. July. Tricolored Bindweed. 



5. C. Nil. — Leaves cordate, 3-lobed ; flowers half 5-cleft ; peduncles 

 shorter than the petioles, 1 — 3-flowered. A very beautiful twining plant, 

 found wild in Penn., but best known as a garden annual. Stem and leaves 

 somewhat hairy. Caly.x very hairy, the segments long acuminate. Flowers 

 large, the tube wliite and the border of a clear blue color (whence its specific 

 name, Anil or Nil, indigo). It is of the easiest culture, and raised from the 

 seed. Blossoms from July to September. Morning-glory. 



6. C. QUAMO'CLIT. — Le«re5 pinnate with filiform pinnjB ; peduncles 

 a little longer than the leaf, 1-flowered. An exceedingly beautiful, tender 

 annua], native at the South, cultivated. Tiie specific name is from the Greek 

 x-vcif^oij a bean. andx-XtTos, dwarf; resembling tiie climbing bean, but less tail. 

 The flowers vary in hue from dark red to rose-color. Aug. Jasmine Bindweed. 



7. C. BaTA'TUS. — Leaves cordate, hastate, angular-lobed, 5-nerved, 

 smoothish ; peduncles long ; flinccrs fascicled; sr^a/*- lanceolate, acuminate. 

 The sweet potato is native of both Indies and cultivated in all tropical 

 climates. Not only the tubers, but tlie leaves and tender shoots are boiled and 

 eaten. The tubers are sweet and considered nutritive. This is \.\\e potato o^ 

 the old English botanists, of Shakspeare, and their cotemporaries, the 

 Solanum tuberosum then being unknown. The stem is round, hispid, pros- 

 trate, creeping, sending out scattered, oblong tubers which are purplish 

 without. Flowers large, purple or white. Sweet Potato. 



2. CALYSTE'GIA. 

 Calyx 5-parte(], included in 2 large foliaccous bracts; 

 corolla campanulate, 5-plicate; stamens subequal, shorter 



