Jennings: Contribution to Botany of Isle of Pines. 177 



Family MALVACE^. 



Key to the Species Enumerated. 



Fruit of several radially placed carpels which separate from each other at maturity. 

 Stigmas and carpels of the same number; calyx without involucral bracts. 



Carpels 2-several-seeded 432. Abulilon permolle. 



Carpels one-seeded (Sida). 



Small plants with weak stems and orbicular, cordate, dentate leaves 



about I cm. in diameter 438. Sida hedercefoUa, 



Not as above. 



Leaves linear or lance-linear, not over i cm. wide. 



Leaves entire and flowers mostly in terminal clusters. 



441. Sida Unifolia, 

 Leaves serrate, flowers in axils of stem and branch leaves. 



435. Sida angustifolia. 

 Leaves ovate to cuneate or lanceolate, often over i cm. wide. 

 Leaves conspicuously cordate at the base. 



Calyx 6-7 mm. long, lobes almost as wide; whole plant lustrous 



velvety-tomentose 437. Sida cordifolia. 



Calyx 6-7 mm. long, the lobes about one-half as wide; plant 

 not lustrous, but with fine spreading hairs. 



439. Sida urens. 

 Calyx 2-3 mm. long; plant not lustrous, but velvety-tomen- 

 tose 440. Sida micrantha. 



Leaves tapering or but slightly cordate at base. 



Flowers solitary or glomerate; stipules 10-15 mm. long, 

 obliquely lanceolate, two to three times as long as the 



petiole 434. Sida glomerata. 



Flowers solitary or glomerate; stipules linear-subulate, about 

 5-6 mm. long; petioles i cm. or more in length. 



433. Sida spinosa. 

 Flowers solitary; stipules about as long as petiole (5-6 mm.). 



436. Sida acuta. 

 Stigmas twice as many as carpels. 



Inflorescence capitate; calyx without involucral bracts. 



Lower leaves rounded-cordate in outline and three to five-lobed ; carpels 



glabrous 443. Malachra fasciata. 



' Lower leaves more ovate, less lobed; carpels villous. 



442. Malachra urens. 



Inflorescence axillary or racemose; calyx furnished with involucral bracts. 



Involucral bractlets 5, partially united; carpels spiny all over (Urena). 



444. Urena siniiata. 



Involucral bractlets 5-15, distinct; carpels unarmed or with 1-3 dorsal 



spines (Pavonia). 



Leaves cordate-ovate, up to 6-10 cm. wide.. . .445. Pavonia spicata. 



Leaves lance-linear, barely i cm. wide 446. Pavonia inlermixta. 



