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 rhombifdlia 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 
eae 6-7 mm. long, sometimes blotched with red at the base : .carpels 10 or 12, subulate- 
aked. 
In waste places, North Carolina to Florida and Texas. 
11. Sida acüta 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 spinósa 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 
em. long, obtuse or acutish, serrate, cordate at the base or the upper ones truncate ; petioles 
slender, about 4 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 angustifdlia 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 : oye 
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 Ellisttii 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 
pes ; lobes triangular, about as long as the tube, with discolored margins : corolla yel- 
ow, 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 rubromarginàta Nash. Perennial, glabrous or puberulent. Stems erect, 
5-10 dm. tall, purple, much branched : leaf-blades varying from narrowly obovate, iar p 
elliptie 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 icels 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 em. 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 : Tabl es 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 de ban} petioles 3-10 mm. long ; stipules subu- 
late-filiform : peduncles 2-8 mm. long: calyx finely pubescent ; lobes 4-5 mm. long, tri- 
