MALVACEAE 771 



somewhat acuminate, irregularly crenate, sometimes slightly angular, cordate at the base : 

 flowers in terminal often congested racemes or panicles : pedicels shorter than the sub- 

 tending petioles : calyx very densely pubescent ; tube 10-angled ; lobes triangular, longer 

 than the tube : petals tawny yellow, 5-7 mm. long : carpels often 10 or 12, the body 3 mm. 

 long, slightly wrinkled, tipped with 2 subulate retrorsely pubescent awns about equalling 

 it in length. 



In sand, Florida Keys and about southern seaports. Spring to fall. 



10. Sida rhombifolia L. Annual, puberulent to glabrate. Stems erect, 5-9 dm. tall, 

 branching : leaf -blades rhombic, elliptic-obovate or oblanceolate, 1.5-8 cm. long, acute or 

 obtuse, serrate except near the base, pubescent with pale hairs beneath ; petioles 3-8 mm. 

 long, sometimes with an obscure tubercle at the base : peduncles, at least those arising from 

 the stem, much longer than the pedicels, mostly 1.5-4 cm. long : calyx puberulent ; tube 

 finally 5-10-ribbed ; lobes triangular, acuminate, about as long as the tube : petals pale 

 yellow, 6-7 mm. long, sometimes blotched with red at the base : carpels 10 or 12, subulate- 

 beaked. 



In waste places, North Carolina to Florida and Texas. 



11. Sida acuta Burm. Annual, puberulent or glabrous. Stems erect, 3-9 dm. tall, 

 branching : leaf -blades lanceolate, oblong-ovate or ovate, 2-10 cm.^ long, acute or acu- 

 minate, irregularly serrate, obtuse or subcordate at the base ; petioles 3-7 mm. long ; 

 stipules conspicuous, narrowly linear to lanceolate, surpassing the petioles : peduncles 

 mostly shorter than the pedicels, commonly 1-7 mm. long : calyx 5-10-ribbed ; lobes tri- 

 angular, slightly acuminate, about as long as the tube : petals yellow to white, 6-12 mm. 

 long, unequally lobed : carpels reticulate-wrinkled, 3-5 mm. long, 2-beaked on top. [S. 

 carpinifolia L. f. ] 



In waste grounds, Florida to Alabama, and throughout the tropics. 



12. Sida spinosa L. Annual, minutely pubescent. Stems erect, 1-6 dm. tall, simple 

 or much-branched : leaf -blades oblong to ovate, or ovate-lanceolate to linear-lanceolate, 1-5 

 cm. long, obtuse or acutish, serrate, cordate at the base or the upper ones truncate ; petioles 

 slender, about J as long as the blades, those of the larger leaves with a spine at the base : 

 flowers axillary : pedicels shorter than the subtending petioles : calyx slightly accrescent ; 

 lobes triangular, acute, about as long as the tube : corolla pale yellow, 1-1.5 cm. broad : 

 carpels about 5, 4 mm. long, slightly wrinkled, 2-beaked. 



In cultivated grounds, waste places and on roadsides, New York to Iowa, Florida and Texas. 

 Summer. Widely distributed in the tropics. 



13. Sida angustif olia Lam. Annual, minutely canescent. Stems more or less dif- 

 fusely branched, the branches 1-6 dm. long, sometimes virgate : leaf-blades linear or nar- 

 rowly lanceolate, or linear-oblong on the lower part of the stem, serrate-dentate, pale green 

 above, whitish beneath, acute or nearly truncate at the base ; petioles mostly 5-10 mm. 

 long, with tubercle-like stipules at the base : pedicels shorter than the petioles : calyx 

 becoming 5 mm. high ; tube sharply ribbed ; lobes triangular, slightly shorter than the 

 tube, acute : corolla copper-yellow, 2-3 cm. broad : carpels about 3 mm. high. 



In dry soil, Texas to Arizona. Also in Mexico and tropical America. Spring to fall. 



14. Sida Ellidttii T. & G. Perennial, roughish pubescent or nearly glabrous. 

 Stems erect, or branched at the base, the branches ascending, 3-5 dm. tall, simple or dif- 

 fusely branched above : leaf-blades linear or nearly so, 2-7 cm. long, acute, serrate ; pet- 

 ioles 2-4 mm. long : flowers axillary : pedicels variable in length, 4-15 mm. long : calyx 

 glabrous ; lobes triangular, about as long as the tube, with discolored margins : corolla yel- 

 low, 2.5-3 cm. wide : carpels 8-12, 4-5 mm. long, strongly rugose- reticulated, 2-beaked. 



In sandy soil, Virginia to Florida and Alabama. Summer. 



15. Sida rubromarginata Nash. Perennial, glabrous or puberulent. Stems erect, 

 5-10 dm. tall, purple, much branched : leaf-blades varying from narrowly obovate, oblong, 

 elliptic to oblong-lanceolate, 1.5-5.5 cm. long, acutish, light green and purple-margined, 

 serrate, above the base ; petioles 3-5 mm. long : peduncles and pedicels shorter than the 

 subtending bracts : calyx angled ; lobes triangular, about 5 mm. long, slightly acuminate, 

 somewhat longer than the tube: corolla light orange, 2.5-3.5 cm. broad: carpels 8-10, 

 3-4 mm. long, 2-awned at the apex, rugose-pitted on the back. 



In sand, Florida. Spring to fall. 



16. Sida leptophylla Small. Apparently perennial, thinly pubescent. Stems erect, 

 over 10 dm. tall, widely branching : leaf-blades thin, linear to linear-oblong, 2-10 cm. 

 long, acute, sharply serrate with short flaring teeth above a short entire base, paler be- 

 neath than above, obtuse or rounded at the base ; petioles 3-10 mm. long ; stipules subu- 

 late-filiform : peduncles 2-8 mm. long : calyx finely pubescent ; lobes 4-5 mm. long, tri- 



