432 FLORA OF TEXAS. 



PHARBITIS, Chois. Morning-glory. 



Sepals 5 ; corolla bell-shaped or funnel-shaped, 5-plaited ; 

 stamens dilated at the base, included ; style simple ; stigma 

 globose ; capsiUe 3-4-celled, 3-4-valved, 6-8-seeded. — Twin- 

 ing herhSy with petioled cordate entire or lobed leaves, and 

 single or cymose blue or ^\x\y\Q jioivers, on axillary bracted 

 peduncles. 



P. HISPIDA, Chois. Annual ; stem glandular-roughened 

 and hairy; leaves entire, round-cordate, acuminate; joet/ziw- 

 cles mostly longer than the leaves, 3-5-flowered ; sepals 

 ovate-lanceolate, acute, mostly hairy; corolla showy, blue, 

 purple, or variegated. (Convolvulus purpureus, Linn.) 

 Around dwellings. Introduced. June-September. 



P. Nil, Chois. Annual, hairy ; leaves membranaceous, 

 broadly cordate, 3-lobed, the lobes acuminate; peduncles 

 shorter than the leaves, 2-3-flowered ; c9e;j«/5 densely hispid, 

 ending in a long subulate point ; hracts linear ; corolla pur- 

 ple. (Convolvulus Nil, L.) Cultivated ground. July- 

 September. Corolla IJ' long. 



CALYSTEGIA, R. Brown. 



Sepals 5, included in the two large membranaceous 

 bracts ; corolla bell-shaped ; style single ; stir/mas 2, oblong 

 or cylindrical ; capsule imperfectly 2-celled, 4-seeded. 

 Leaves petioled, cordate or sagittate; peduncles 1-flowered. 



C. SEPIUM, R. Br. Smooth ; ste^n twining ; leaves 

 broadly sagittate, acute, the wide lateral lobes obliquely 

 truncated and often toothed ; peduncles 4-angled, as long 

 as the petioles ; hracts cordate-ovate or oblong, strongly 

 keeled on the backs ; sepals acute ; corolla white or rose- 

 color ; leaves 2-4' long ; corolla !}'-%' long ; stir/mas oblong- 

 ovate ; stamens dilated and flattened below. Perennial. 



