520 



MALVACEAE. 



VOL. 11. 



About 100 species, natives of the warmer parts of America, Asia, Africa and Australasia. 



Besides the following, some 20 others occur in the southern and southwestern parts of the United 

 States. Type species: Sida aim folia L. 

 Leaves linear, ovate or oblong, serrate 



Leaves ovate or oblong-lanceolate ; flowers 2' '-4" broad i. S. spinosa. 



Leaves linear or linear-oblong ; flowers 6"-i2" broad. 2. 6". Elliottii. 

 Leaves palmately 3-7-lobed. 



Glabrous or nearly so, tall ; flowers in terminal panicles. 3. 5". hermaphrodita. 



Densely stellate-canescent, low ; flowers axillary. 4. S. hederacea. 



i. Sida spinosa L. Prickly Sida. Indian 

 or False Mallow. Fig. 2860. 



Sida spinosa L. Sp. PI. 683. 1753. 



Annual, erect, branching, finely and softly pu- 

 bescent, i-2 high. Leaves ovate to oblong- 

 lanceolate, i '-2' long, 5"-io" wide, pelioled, 

 obtuse or acute, truncate or cordate at the base, 

 crenate-dentate ; flowers axillary, short-peduncled, 

 yellow, 2"~4" broad ; peduncles shorter than the 

 petioles; calyx -teeth triangular, acute; carpels 5; 

 dehiscent at the apex into 2 beaks ; stipules linear; 

 petioles of the larger leaves with a small spine- 

 like tubercle at the base. 



In waste places, Maine to New Jersey, Iowa and 

 Michigan, Kansas, Florida and Texas, and widely dis- 

 tributed in tropical America. Supposed by some to 

 be naturalized at the north, but it occurs in Xew 

 Jersey as if native. Summer. 



2. Sida Elliottii T. & G. Elliott's Sida. Fig. 2861. 



Sida Elliottii T. & G. Fl. N. A. i : 231. 1838. 



Perennial, glabrous or nearly so, branching, i-4 high. 

 Leaves short-petioled, linear or linear-oblong, i'-2 r long, 

 2"-2\" wide, mostly obtuse at each end, serrate-dentate ; 

 peduncles i-flowered, often longer than the petioles; flowers 

 axillary, yellow, 6"-i2" broad, calyx-teeth broadly ovate, acute ; 

 carpels &-io, dehiscent at the apex, slightly and abruptly 

 pointed. 



In dry soil, southern Virginia to Florida, west to Missouri and 

 Chihuahua. Summer. 



3- Sida hermaphrodita (L.) Rusby. Virginia 

 Mallow. Fig. 2862. 



Napaea hermaphrodita L. Sp. PI. 686. 1753. 



Sida Napaea Cav. Diss. 5 : 277. pi. 132. f. I. 1788. 



5. hermaphrodita Rusby, Mem. Torr. Club 5: 223. 1894. 



Perennial, nearly glabrous, branching, 4-io high. 

 Leaves petioled, 3'-6' wide, ovate-orbicular, deeply 

 3-7-lobed or cleft, the lobes lanceolate or ovate, the 

 middle one commonly longest, all incised-dentate. acute 

 or acuminate ; flowers white. g"-i2" broad, numerous 

 in terminal corymbose panicles ; pedicels, calyx and 

 petioles of the upper leaves finely pubescent; calyx- 

 lobes short and broad, acute; carpels about 10, acute, 

 dehiscent at the top. 



Along rivers, in rocky places, southern Pennsylvania to 

 Ohio, Virginia, West Virginia and Tennessee. Summer. 



