778 MALVACEAE 



tary on axillary peduncles. Sepals 5, united below. Petals 5, usually yellow. Ovary 

 sessile, 3-4-celled : styles united into a 3-4-grooved column : stigmas 3-4. Ovules 3-8 in 

 each cavity. Capsule loculicidally 3-4-valved. Seeds few or numerous, usually woolly. 

 The plants flower from spring to fall or throughout the year. 



Leaf-blades entire or 3-lobed : bractlets subulate. 1. C. heterophylla. 



Leaf-blades coarsely toothed : bractlets broadened upward. 2. C. sulphured. 



1. Cienfuegosla heterophylla (Vent.) Garcke. Stems erect or decumbent, 1-5 dm. 

 long, glabrous, the branches erect or spreading : leaf-blades linear-oblong varying to lanceo- 

 late or rarely obovate, 1.5-5 cm. long, entire or three-lobed ; petioles rarely as long as 

 the blade? : peduncles shorter than the blades or longer, gradually enlarged under the 

 calyx : bractlets of the involucels linear-subulate, 1-5 mm. long : calyx glandular ; lobes 

 lanceolate, 6-12 mm. long, acuminate : petals yellow and purple-blotched at the base, 

 1.5-2 cm. long : capsules oblong or oval-oblong, about 1 cm. long, abruptly pointed. 



In sand, Florida Keys. Also in the West Indies and Brazil. 



2. Cienfuegosia sulphurea (St. Hil. ) Garcke. Stems glabrous or scurfy at the nodes, 

 branched at the base, the branches 1-5 dm. long : leaf-blades broadly oblong to subor- 

 bicular, 3-7 cm. long, obtuse, repand or repand-lobed, rounded or truncate at the base ; 

 petioles about as long as the blades : peduncles about as long as the petioles or longer : 

 oractlets of the involucels linear to linear-spatulate : calyx glandular ; lobes lanceolate or 

 linear-lanceolate, acute, 8-13 mm. long : petals greenish yellow, or sulphur-colored and 

 brown at the base, 1-2 cm. long : capsules subglobose, or oval-globose, 1 cm. in diameter. 



In sandy soil, Texas. Also in Brazil and Paraguay. 



17. GOSSYPIUM L. 



Annual or perennial herbs, or shrubs or trees, with erect branching stems. Leaves 

 alternate : blades palmately lobed, or rarely entire, thickish, petioled. Involucel of 3 

 large cordate toothed or incised bracts. Flowers showy, on axillary peduncles. Sepals 5, 

 united into a cup-like calyx. Petals 5, white or yellowish, often turning pink or magenta. 

 Ovary sessile, 5-celled : styles united into a five-grooved column. Ovules numerous in each 

 cavity. Capsule loculicidally 5-valved, leathery. Seeds various, usually densely clothed 

 with long white hairs. COTTON. 



Seeds 4-5 mm. broad, glabrous, that is, completely separable from the wool : lobes of the leaf-blades 

 mostly longer than the body. 1. G. Barbadensc. 



Seeds 6-7 mm. broad, woolly : lobes of the leaf-blades mostly shorter than the body. 



Wool white : plants herbaceous : foliage if pubescent, hirsute. 2. G, hcrbaceum. 



Wool tawny : plants shrubby : foliage closely pubescent with very short hairs. 3. G. religiosum. 



1. Gossypium Barbadense L. Annual or perennial, glabrous. Stems often 2 m. 

 tall or more, widely branching : leaf-blades 1-2 dm. in diameter, with 3-5 lanceolate or 

 ovate-lanceolate acuminate lobes which are longer than the body of the blade ; petioles 

 shorter than the blades : peduncles 1-2 cm. long : bractlets of the involucels 2-6 cm. long, 

 pectinate-laciniate, cordate : petals 5-10 cm. long : capsules ovoid, acute, 3.5-5 cm. long, 

 containing white cotton : seeds smooth and glabrous, completely separating from the cotton. 



In sandy soil, especially near the coast, North Carolina to Florida, and in tropical America. 

 Throughout the year. SEA-ISLAND COTTON. 



2. Gossypium herbaceum L. Annual, or perennial in the extreme South, glabrous, 

 or pubescent with spreading hairs. Stems widely branching, 3-15 dm. tall : leaf-blades 1-2 

 dm. in diameter, with 3-5 triangular or ovate lobes, mostly shorter than the body of the 

 blade ; petioles about as long as the blades or shorter : peduncles 1-3 cm. long : bractlets of 

 the involucels pectinate-laciniate : petals surpassing the involucel, white, turning pink or 

 purple : capsules subglobose, containing white cotton : seeds clothed with a close woolly coat. 



In fields and waste places, Virginia and Arkansas to Florida and Texas. Summer and fall, 

 hroughout the year in southern Florida. COMMON COTTON. 



3. Gossypium religidsum Roxb. Annual, shrubby, closely pubescent with very 

 short hairs. Stems 1-4 m. tall, branching : leaf-blades 3-8 cm. in diameter, angular or 

 with 3 triangular or ovate lobes ; petioles mostly shorter than the blades : peduncles 1-2 

 cm. long : bracts of the involucels 2-3 cm. long, pectinate-lacerate : petals 3-6 cm. long : 

 capsules 2-2.5 cm. high, containing tawny cotton: seeds with a close persistent woolly 

 coat. 



Along the coast, Florida and Texas. Also in the West Indies and other parts of tropical America. 



