1360 APPENDIX 



7c. Ipomoea tilieicea (Willd.) Choisy. Perennial, pubescent. Stems twining: 

 leaf -blades ovate, acuminate, entire or 3-5-lobed, cordate at the base: peduncles 

 dichotomous, several-many-flowered: sepals unequal, oblong-lanceolate, 8-10 mm. 

 long, cuspidate-acuminate: corolla rose-purple or pink; tube 4-5 cm. long. 



In hammocks, Florida Keys. Also in the tropics. All year. 



After Ipomoea cairica, insert: 



11a. Ipomoea pulch^lla Eoth. Perennial, glabrous or nearly so. Stems slen- 

 der: leaf -blades 1-5 cm. long; segments linear-lanceolate, acute or acuminate, entire 

 or undulately toothed: peduncles filiform, often tendril-like, 1-2-flowered: sepals 

 ovate, 4-5 mm. long, becoming 6-7 mm. long, acute: corolla pale violet; tube 18-30 

 mm. long: capsules 10 mm. long or less. — Differs from I. cairica in the slender 

 peduncles and the acute sepals. 



In thickets and waste places, near New Orleans, Louisiana. Also in the tropics. 



Page 963, transfer Ipomoea dissecta to the genus Operculina (see below). 



Page 964, under Pharbitis hedracea, strike out the synonym Ipomoea Nil, and 

 before Pharbitis Lindheimeri, insert : 



3a. Pharbitis Nil (L.) Choisy. Annual, hispid. Stems twining, several m. 

 long: leaf -blades 6-16 cm. long, 3-angled or 3-lobed; lobes rarely constricted below 

 the middle, acute: sepals 2.5-4 cm. long, linear-lanceolate, not conspicuously broad- 

 ened at the base: corolla deep-blue, except the white tube, 3-6 cm. long; limb 4-6 

 cm. broad. — Differs from P. hederacea ia the narrow-based sepals and the large 

 corolla. 



In woods and thickets, Florida. Also in the tropics. 



Page 964, after Pharbitis cathartica, insert: 



7a. TURBINIA Kaf. 



Perennial, high-climbing or trailing vines. Leaves alternate: blades of aa ovate 

 type, cordate, entire. Flowers numerous, in axillary corymbose peduncled clusters 

 which are borne near the ends of the branches. Sepals leathery. Corolla funnelform. 

 Ovary 2-celled, 2-ovuled. Capsules turbinate, about twice as long as wide, acute, 

 indehiscent, 1-celled and 1-seeded. Seeds finely pubescent. — Differs, like the follow- 

 ing genus, from Ipomoea and PJmrbitis in the indehiscent, often baccate fruits. 



1. Turbinia corymbosa (L.) Eaf. Stems trailing. Leaf -blades ovate, gla- 

 brate: sepals narrowly ovate or oblong, 6-8 mm. long, the whitish margins scarious: 

 corolla white with green bands, 3-4 cm. long: capsules 8-10 mm. long. 



In hammocks, Florida Keys and southern Texas. Also in tropical America. 



7b. OPERCULmA S. Manso. 



Perennial stout twining vines, the branches and peduncles often winged. Leaves 



alternate: blades entire, lobed or divided. Calyx large, pyriform, constricted above 



during anthesis: sepals membranous or chartaceous, closely imbricated. Corolla 



campanulate: limb with broad lobes. Stamens 5, included or with the spirally 



twisted anthers protruding. Ovary 2-celled. Capsules globose or spheroidal, often 



operculate or irregularly dehiscing, sometimes valvate. Seeds large, black glabrous 



or pubescent. — Differs from Pharbitis and Ipomoea in the urceolate calyx and the 



spirally twisted stamens. 



Corolla yellow: sepals becoming 4-5 cm. long: branches glabrous. 1. O. tuberosa. 



Corolla white with a purple throat: sepals becoming 1.5-2 cm. long: branches hispid. 2. O. dissecta. 



1. Operculina tuberosa (L.) Meisn. Stem glabrous: leaf -blades palmately 5-7- 

 lobed; lobes elliptic-lanceolate, 4-8 cm. long, acuminate: peduncles 1-5-flowered; 

 pedicels much thickened at maturity: corolla 4-5 cm. long; limb 5-7 cm. broad: cap- 

 sules 3-4 cm. in diameter: seeds pubescent. 



In woods and waste places, peninsular Florida and Texas. Naturalized from the 

 tropics. Yellow Morning Glory. 



2. Operculina dissecta (Jacq.) House. Stem mostly villous-hirsute : leaf- 

 blades palmately 5-7-parted; segments oval to oblong or lanceolate, 3-10 cm. long. 



