GENUS 4. 



MORNING-GLORY FAMILY. 



45 



5. Ipomoea purpurea (L.) Lam. Morning- 

 glory. Fig. 3434. 



Convolvulus pitrpureus L. Sp. PI. Ed. 2, 219. 1762. 

 Ipomoea purpurea Lam. Tabl. Encycl. i: 466. 1791. 

 Pharbitis purpurea Voigt. Hort. Sub. Calcutta 354. 



1845- 



Annual, pubescent ; stem retrorsely hairy, twin- 

 ing or trailing, 4-io long. Leaves broadly ovate, 

 deeply cordate, acute or acuminate, 2'-^ wide, 

 slender-petioled ; peduncles slender, i-5-flowered, 

 often longer than the petioles ; sepals lanceolate 

 or oblong, acute, pubescent or hirsute near the 

 base, 6"-8" long; corolla funnel form, blue, pur- 

 ple, pink, variegated or white, 2 r -2\' long; ovary 

 3-celled (rarely 2-celled) ; stigmas 3 (rarely 2)-; 

 capsule depressed-globose, about 5" in diameter, 

 shorter than the sepals. 



In waste places, commonly escaped from gardens, 

 Nova Scotia to Florida, west to Ontario, Nebraska 

 and Texas. There is a double-flowered form in cul- 

 tivation. Adventive or naturalized from tropical 

 America. Ropewind. July-Oct. 



6. Ipomoea hederacea Jacq. Ivy-leaved 

 Morning-glory. Fig. 3435. 



Ipomoea hederacea Jacq. Icon. Rar. pi. 36. 1781. 

 Pharbitis hederacea Choisy, Mem. Soc. Gen. 6 : 440. 



1833- 



Annual, pubescent; stem twining or climbing to 

 a height of 2-5, slender, retrorsely hairy. Leaves 

 ovate-orbicular in outline, long-petioled, deeply 

 3-lobed, cordate at the base, 2'-$' long, the lobes 

 ovate, acuminate, entire, or the lateral ones some- 

 times repand or dentate; peduncles i-3-flowered, 

 much shorter than the petioles ; flowers opening in 

 early morning, soon closing; sepals lanceolate with 

 long linear often recurved tips, densely hirsute be- 

 low, sparingly so above, 8"-i2" long ; corolla funnel- 

 form, the tube usually nearly white, the limb light 

 blue or purple, I'-ii' long; ovary 3-celled; stigmas 

 3 ; capsule depressed-globose, 3-valved, about as 

 long as the lanceolate portion of the sepals. 



In fields and waste places, Maine to Florida, Penn- 

 sylvania, Nebraska and Mexico. Naturalized or adven- 

 tive from tropical America. July-Oct. 



6. CONVOLVULUS L. Sp. PI. 153. 1753. 



Herbs (the following species perennials wrth slender roots or rootstocks) with trailing, 

 twining or erect stems. Leaves entire dentate or lobed, mostly cordate or sagittate and 

 petioled. Flowers axillary, solitary or clustered, large, pink, purple or white. Sepals nearly 

 equal or the outer larger, the calyx bractless or with a pair of bracts at its base. Corolla 

 funnelform or campanulate, the limb plaited, 5-angled, 5-lobed, or entire. Stamens inserted 

 on the tube of the corolla, included; filaments filiform, or dilated at the base. Ovary 1-2- 

 celled, 4-ovuled; style filiform; stigmas 2, filiform, oblong, or ovoid. Capsule globose or 

 nearly so, i-4-celled, 2-4-valved. Seeds glabrous. [Latin, to roll together, or entwine.] 



About 200 species, of wide distribution in tropical and temperate regions. Besides the follow- 

 ing, some 30 others occur in the southern and western United States. Type species : Convolvulus 

 sepiuin L. 



Calyx with two large bracts at the base, which enclose it. 

 Stems trailing or climbing. 



Peduncles long, much longer than the petioles. 



Stems 3-io long; leaves hastate, the auricles often dentate. i. C.sepium. 



Stems i-3 long; leaves sagittate, the auricles rounded, entire. 2. C.repens. 



Peduncles short, mostly not longer than the petioles. 3. C.fraterniflorus. 



Stem erect or ascending ; flowers white ; bracts not cordate. 4. C. spiihamaeus. 



Calyx not bracted ; peduncle bracted at the summit. 



Glabrous or nearly so ; leaves entire, auriculate. 5. C. arvensis. 



Canescent ; leaves with 2-4 basal lobes. 6. C, incamis. 



