COISTVOLVULACEAE. 



299 



Sepals linear or lanceolate, long ; ovary mostly 3-celled. 

 Bases of the sepals with long spreading hairs. 

 Sepals glabrous, or sparingly short-pubescent. 

 Leaves silky-pubescent. 

 Leaves glabrous or nearly so. 



Sepals oblong to ovate, short ; ovary mostly 2-celled or 4-celled. 

 Stems creeping ; leaves obtuse or emarginate, entire, fleshy. 

 Stems climbing or twining. 

 Flowers purple. 



Sepals obtuse; leaves sagittate. 



Sepals acute, cuspidate : leaves variously lobed or entire. 

 Flowers white with a purple throat ; leaves digitately < 

 vided, the segments toothed. 



1. Ipomoea Nil (L.) Roth. BLUE 

 MORNING-GLORY. (Fig. 316.) Stems 

 loosely pilose-pubescent, 2-6 long, 

 prostrate or twining. Leaves more or less 

 pilose, the blades 1V-5' broad, cordate 

 at the base, 3-lobed, the lobes acute or 

 acuminate; peduncles short or elongated, 

 1-3-flowered ; sepals narrowly linear, 8"- 

 12" long, their bases somewhat broad- 

 ened and densely long-pubescent; corolla 

 blue, fading purple, its tube !'-!*' long, 

 the limb 2'-2i' broad; ovary and cap- 

 sule 3-celled; capsule about 4" long. 

 [Convolvulus Nil L. ; Pharbitis Nil 

 Choisy; /. liederacea of Verrill, as to 

 the name.] 



Occasional in wa"ste and cultivated 

 grounds. Introduced. Native of tropical 

 regions. Flowers in summer and autumn. 

 Not, as stated by Verrill, the most abun- 

 dant species, at least at present. 



1. 7. Nil. 



2. 

 3. 



I. villosa. 

 I. cathartica. 



4. 7. Pes-caprae. 



5. 

 6. 



7. sagittata. 

 I. Batatas. 



I. dissecta. 



2. Ipomoea villosa E. & P. 

 VILLOUS MORNING-GLORY. (Fig. 317.) 

 Pubescent, twining, sometimes as- 

 cending trees to a height of 40 or 

 more. Leaves thin, slender-petioled, 

 the blades 3 '-6' long, pubescent on 

 both sides, entire or 3-lobed, long- 

 acuminate at the apex, deeply cor- 

 date at the base ; peduncles 1-4- 

 flowered, axillary, as long as the 

 petioles or shorter ; bracts linear- 

 lanceolate, 8"-12" long; sepals lan- 

 ceolate, acuminate, pubescent, about 

 1'long; corolla purple, about 3' long. 

 [Ipomoea jamaicensis of Rein, Le- 

 froy, Hemsley and Moore; Ipomoea 

 purpurea of Lefroy, Harshberger, 

 Verrill and H. B. Small; Pharbitis 

 de alb at a and P. triloba of Mills- 

 paugh.] 



Common in marshes and in waste 

 grounds. Introduced. Native of South 

 America. Flowers in summer and 

 autumn. 



