348 CONVOLVULACEAE. 



nearly sessile; peduncles filiform, 1-3-flowered, mostly longer than the leaves; 

 sepals lanceolate, acute or acuminate, 2-3 mm. long; corolla white or pale blue, 

 5-6 mm. broad; capsule longer than the calyx. 



Bahamas (according to Grisebach) : — Jamaica; continental tropical America; 

 Old World tropics. Nakeow-leaved EvoLvrLus. 



2. JACQUEMONTIA Choisy, Mem. Soc. Phys. Gen. 6: 476. 1833. 



Trailing or climbing vines, mostly herbaceous, the leaves usually entire, 

 the mostly small, violet blue or white flowers cymose or subcapitate. Sepals 

 nearly equal or the outer ones larger than the inner. Corolla campanulate or 

 rotate-campanulate, the limb 5-angled. Stamens shorter than the corolla; 

 filaments filiform, or their bases dilated; anthers oblong. Ovary 2-celled; 

 ovules mostly 4; united styles filiform; stigmas 2. Capsule small, 2-celled. 

 [Commemorates Victor Jacquemont, a French botanical traveller, died 1828.] 

 Thirty species or more, mostly of tropical and subtropical America, Type 

 species: Convolvulus coeruleus Schum. 



Corolla only 3-4 mm. broad ; cymes sessile or nearly so. 1. J. verticillata. 

 Corolla 1—5 cm. broad. 



Corolla white : leaves not cordate : cymes short-peduncled. 



Leaves linear to oblong4anceolate. 2. J . jamnicensis. 



Leaves ovate-oval to suborbicular, thick and fleshy. 3. J. caycnsis. 

 Corolla usually blue ; leaves cordate or subcordate ; cymes 



long-peduncled. 4. J. pentantha. 



1. Jacquemontia verticillata (L.) Urban, Symb. Ant. 3: 339. 1902. 



Ipomoea verticillata L. Syst. ed. 10, 924. 1759. 

 Convolvulus micranthus E. & S. Syst. 4: 276. 1819. 

 Jacquemontia micrantha G. Don. Gen. Syst. 4: 283. 1838. 



Stems very slender, appressed-pubescent at least above, 2 m. long or less. 

 Leaves oblong to lanceolate, membranous, repand or entire-margined, 1.5-4 em. 

 long, mucronate at the apex", cordate or subcordate at the base, more or less 

 pubescent, short-petioled ; cymes sessile or very short-peduncled, several-flow- 

 ered; pedicels about as long as the sepals; sepals ovate-lanceolate, acute, 2.5-3 

 mm. long;! corolla 3-4 mm. broad, purple or pink, its limb 5-cleft; capsule 

 globose, about 2 mm. in diameter; seeds brownish, rugulose. 



Waste and cultivated ground, Andros and New Providence : — Cuba ; Hispaniola ; 

 Jamaica. Small-floweeed Jacquemontia. 



2. Jacquemontia jamaicensis (Jacq.) Hallier f. ; Solereder, Syst. Anat. 641. 



1899. 



Convolvulus jamaicensis Jacq. Obs. 3: 6. 1768. 



Finely pubescent or glabrate ; stems slender, 1-2 m. long. Leaves lanceo- 

 late to oblong, entire, rather firm in texture, short-petioled, 1.5-4 cm. long, 

 obtuse, mucronulate or acute at the apex, narrowed or rounded at the base, 

 sparingly pubescent or glabrate; cymes 1-several-flowered, short-peduncled; 

 sepals broad, ovate, acute, about 2 mm. long; corolla white or purplish, 1-1.5 

 cm. broad, the limb 5-cleft, the narrow segments acute; capsule subglobose, 

 about 4 mm. long; seeds rough. 



Pine-lands and scrub-lands, throughout the archipelago from Great Bahama and 

 the Berrv Islands to Mariguana, the Inaguas. and the Anguilla Isles : — Florida : 

 Cuba to St. Thomas and St. Croix ; Jamaica. Recorded from Bermuda. The species 

 evidently consists of a large number of races differing greatly in leaf-form and in 

 pubescence ; none of the Bahamian plants collected are exactly identical with the 

 typical race from Jamaica. Common Jacquemontia. 



