670 CONVOLVULACEAE (CONVOLVULUS FAMILY) 



oblong-spatulate and shqrt-petioled ; flowers almost sessile in the axils ; corolla 

 purple, about 1 cm. broad. (E. pilosus Nutt.) Sterile plains and prairies, 

 N. Dak. and Neb. to Mo. and Tex. May-July. 



4. IPOMOEA L. MORNING GLORY 



Calyx not bracteate at base, but the outer sepals commonly larger. Corolla 

 salver-form or funnel-form to nearly campanulate ; the limb entire or slightly 

 lobed. Capsule globular, 4-6 (by abortion fewer) -seeded, 2-4-valved. (Name, 

 according to Linnaeus, from fy, a Bindweed, and S/AOIOS, like; but ty is a worm.} 



1. QUAMOCLIT [Tourn.] Gray. Corolla salver-form, or ivith somewhat 

 funnel-form but slender tube; stamens and style exserted ; flowers red; 

 annual twiners. 



1. I. QUAMOCLIT L. (CYPRESS VINE.) Leaves pinnately parted into linear- 

 thread-shaped parallel lobes ; peduncles 1-2-flowered ; corolla slender, 3.5-4 cm. 

 long, scarlet-red, or sometimes white. (Quamoclit Britton.) Sparingly spon- 

 taneous, especially southw. July-Oct. (Introd. from Trop. Am.) 



2. I. coccfNEA L. Leaves heart-shaped, acuminate, entire or angled ; pedun- 

 cles 2-several-flowered ; sepals awn-pointed ; corolla light scarlet, 2-3 cm. long. 

 (Quamoclit Moench.) River-banks and waste places, N. Y. to Mo., and 

 southw. July-Oct. (Indigenous south westw.) Var. HEDERIFOLIA (L.) Gray. 

 Leaves deeply palmate-lobed. River-flats, waste land, etc., from Mass, westw. 

 and southw. (Adv. from Trop. Am.) 



2. EUIPOMOEA Gray. Corolla funnel-form or nearly campanulate, con- 

 torted in the bud ; stamens and style not exserted. 



* Lobes of stigma and cells 3, sepals long and narrow, attenuate upward, mostly 



hirsute below; corolla purple, blue, or white. (MORNING GLORY.) 



3. I. HEDERACEA Jacq. Stems retrorsely hairy ; leaves heart-shaped, 3-lobed, 

 the lobes acute or acuminate ; peduncles short or rather long, 1-3-flowered ; 

 calyx densely hairy below; corolla white and purple or pale blue, 3-4.5 cm. 

 long. AVaste and cultivated ground, from s. Me. westw. and southw. July- 

 Sept. (Introd. from Trop. Am.) 



4. I. puRptiREA (L.) Roth. (COMMON M.) Annual ; stems retrorsely hairy ; 

 leaves heart-shaped, acuminate, entire ; peduncles long, umbellately 3-5-flow- 

 ered; calyx bristly-hairy below; corolla funnel-form, 4.5-7 cm. long, purple, 

 varying to white. Escaped in cultivated grounds. (Introd. from Trop. Am.) 



* * Stigma 2-lobed or entire ; cells 2, each 2-seeded ; sepals broader, imbricated ; 



leaves cordate, acuminate. 



5. I. pandurata (L.) G. F. W. Mey. (WILD POTATO-VINE, MAN-OF-THE- 

 EARTH.) Perennial, smooth or nearly so when old, trailing or sometimes twin- 

 ing ; leaves occasionally contracted at the sides so as to be fiddle-shaped ; 

 peduncles longer than the petioles, 1-5-flowered ; sepals smooth, ovate-oblong, 

 very obtuse; corolla open-funnel-form, 4.5-8 cm. long, white, with purple in the 

 tube. Dry ground, Ct. to Ont., southw. and southwestw. June-Sept. 

 Stems long and stout, from a huge root, which often weighs 4-8 (-11) kg. 



6. I. lacunbsa L. Annual ; rather smooth ; stem twining and creeping, slen- 

 der ; leaves entire or angle-lobed ; peduncles short, 1-3-flowered ; sepals lance- 

 oblong, pointed, bristly-ciliate or hairy, half the length of the sharply 5-lobed 

 (white, 1-2 cm. long) corolla. River-banks and low grounds, Pa. to 111., Kan., 

 and southw.; adv. on ballast northw. 



5. CONV6LVULUS [Tourn.] L. BINDWEED 



Corolla funnel-form to campanulate. Stamens included. Capsule globose, 

 2-celled, or imperfectly 4-celled by spurious partitions between the 2 seeds, or 

 by abortion 1-celled, mostly 2-4-valved. Herbs or somewhat shrubby plants, 

 twining, erect, or prostrate. (Name from convolvere, to entwine.) 



