ORDER 93. CONVOLVULACE^E. 573 



8 I. panduratus Meyer. WILD POTATO. (Fig. 321.) MAV-OF-THE-EARTH. St. 

 twining; Ivs. broad-cordate or pauduriform; ped. I to 5 -Howe-red, longer than the 

 petioles; cal. smooth, ovate, 3 to 4 timis shorter than the a'i<ple corolla,. 7J. In 

 sandy fields, K Y. to 111. aud Ga. Sts. several from the same root, 4 to 8f long, 

 slender, smooth. Lvs. 2 to 3' long, and about the same width, acute or obtuse, 

 with roundcnl lobes at the base, sometimes lobed and hollowed on the sides and 

 becoming fiddle-shaped. Ped. bearing several large flowers. Cor. near 3' long, 

 white, with a purple center. Jl., Aug. 



5. CONVOL'VULUS, L. BIND-WEED. (Lat. convolvers, to entwine; 

 from the habit of most of the species.) Sepals 5, corolla campanulate; 

 style 1 ; stigmas 2, linear-cylindrical, often revolnte ; ovary 2-celled, 4- 

 ovnled ; crpsule 2-celled, 4-sceded, or by abortion fewer. Herbs or 

 shrubby plants, twining or erect. None native. 



1 C. arveiisis L. Striate, angular, generally prostrate ; Ivs. sagittate, somewhat 

 auriculate; ped. mostly 1-flowered, bibracteate near the apex; sep. roundish- 

 ovate; caps, smooth. L Fields and pastures, Maine to Car., not common. Sterna 

 several feet long, climbing or prostrate, a little hairy. Leaves 1 2' 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. Jn. 



2 C. tricolor L. St. ascending, villose ; Ivs. lance-obovate, subspatulate, sessile, 

 ciliate at base; pod. 1-tlowered, bracteate, longer than the leaves; sep. ovate- 

 lanceolate, acute; cor. tricolored; caps, villous. 1) St. weak, 1 to 3 f long. Cor. 

 yellowish in the center, white in the middle zone, and of a fine sky blue on the 

 outer part of the border. Jl. f Eur. 



6. CALYNYC'TION speciosa, native of W. Ind., rarely seen in cul- 

 tivation, may possibly bj found wild in Fla. 



7. CALYSTE V GIA, Br. (Gr. ita^v^ calyx, a-eyr], a covering ; allud- 

 ing to the conspicuous calycine bracts.) Calyx 5-parted, included in 



2 large, foliaccous bracts ; cor. campanulate, 5-plicate ; sta. subequal,; 

 .shorter than the limb ; ova. half bilocular, 4-ovuled ; sty. simple; stig., 

 2, obtuse ; caps. 1-celled, 4-seeded. Herbs twining or prostrate. Ped. 1 

 1-flowcred, solitary. 



1 C. spitham^us Br. St. erect or assurgent ; Ivs. oblong-lanceolate, subcordate, 

 hoary-pubescent; ped. 1-flowered, about as long as the leaves. 1 An erect, downy 

 species, 8 10' (a span) high, found in fields and hilly pastures, Can. to Penn. "W. 

 to 111. Stem branching, leafy, bearing one, often two or more large, white 

 flowers, on peduncles 2 i' long, issuing from near the root. Leaves 2 3' long, 

 as wide, oval, with an abrupt, cordate base, and on petioles as long. Bracts 

 concealing the calyx. June. 



2 C. Sepium Br. RUTLAND BEAUTY. Glabrous; stem twining; Ivs. cordate- 

 sagittate, the lobes truncate and apex generally acute ; ped. quadrangular, 1- 

 flowered; bracts cordate, much longer than the calyx. If A vigorous climber, 

 in hedges and low grounds, Can. to Car. "W. to Iowa. Sts. 5 to 8f in length. 

 Lvs. 2 'to 4' long, half as wide. Fls. numerous, large, white with a reddish tinge. 

 Bracts close to "the corolla, concealing the calyx. Jn., Jl. f (Convolvulus L.) 

 The wild plant (Convolvulus repens L.) is often more or less pubescent. 



3 C. Catesbeianus Ph. Tomentous ; st. twining ; Ivs. oblong-ovate, cordate or 

 sagittate, acute or rather obtuse, petlolate, auricles obtuse; ped. 1-flowered longer 

 than the petiole but shorter than the leaves ; bracts lance-oblong, acute ! (obtuse, 

 Pursh, subacuminate, Choisy), cordate, twice longer than the calyx, half as long 

 as the purple corolla. Sandy soils, Car. and Ga. Sts. a few feet long. Lvs. small, 

 1 to 2' long. Cor. showy, 18'' long. Apr., May. 



4 C. paradozais Ph. Differs from the foregoing in its bracts, which are " linear 

 and remote from the flower. Va. to Car." (Pursli). Probably a mere variety ; we 

 venture to suggest that both may be only states of C. Sepium. 



