Jennings: Contribution to Botany of Isle of Pines. 229 



Stamens included within the corolla. 



Sepals blunt to acuminate; ovary 2-4-celled; capsule 4-seeded (Ipomosa). 

 Stems prostrate or creeping, not twining. 

 Leaf-blades broadly ovate, cordate, acute. 



584. Ipomoea asarifolia. 

 Leaf-blades suborbicular, obcordate, or emarginate at the apex, 



not cordate 585. Ipomoea Pes-Capra. 



Stems trailing or twining, at least the tips twining. 



Seeds with a dorsal or marginal coma longer than the seed, or 

 the seed completely covered with long hairs. 

 Leaf-blades divided to the petiole into 3 to 9, stalked or sessile 



leaflets 592. Ipomcea Carolina. 



Leaf-blades entire, or, if lobed, not divided to the petiole. 



Leaf-blades deeply s-lobed 591. Ipomoea quinquefolia. 



Leaf-blades entire or 3-lobed, rarely 5-lobed. 



586. Ipomosa lacteola. 

 Seeds glabrous or pubescent but not with a conspicuous coma. 

 Sepals very unequal in size. 



Leaf-blades linear to broadly lanceolate; corolla small. 



589. Ipomcea tenuissima. 

 Leaf-blades ovate in outline. 



Sepals 10-14 mm. long; stems usually prostrate and 

 blades usually lobed, glabrous. 



588. Ipomcea Batatas. 

 Sepals 8-19 mm. long; the pilose or pubescent stems 



usually twining 587. Ipomcea tiliacea. 



Sepals equal in size or nearly so 590. Ipomcea sagiltata. 



Sepals with long tips; ovary 3-5-celled; capsules 6-io-seeded. 



593. Pharbitis acuminata. 

 Stigmas distinctly flattened. 



Leaves cordate-oblong; peduncle short or none; flower-clusters incon- 

 spicuous 595- J acquemontia verticillata. 



Leaves ovate or ovate-oblong; peduncles long; flower-clusters dense and 

 conspicuously bracted and tawny-pubescent. 



594. J acquemontia tamnifolia. 



578. Evolvulus sericeus Swartz. 

 Evolvulus sericeus Swartz, Prodromus Descriptionum Vegetabilium Indiae Occi- 

 dentalis, 1788, p. 55. 



Northern part of the island, Blain, No. 10 (Millspaugh) ; near 

 Nueva Gerona, February 14, 1904, A. H. Curtiss, No. 344; 0. E. 

 Jennings, No. 614. General Distribution: From Georgia and Florida 

 to Texas, Mexico, South America and in the West Indies and Bahamas. 



The specimens from the Isle of Pines are very close to Evolvulus 

 Bracei House, of the Bahama Islands. 



