54 MALVACEAE. (MALLOW FAMILY.) 



Florida, and westward. May - September. Stems 1 high. Flowers purple, 

 2-' wide, on peduncles which are sometimes 1 long. 



3. C. alcaeoid.es, Gray. Strigose-pubescent ; stems slender (1 high); 

 lower leaves triangular-cordate, incised ; the upper 5 - 7-parted, laciniate, the 

 uppermost divided into linear segments ; flowers corymbose, on slender pedun- 

 cles (rose-color or white) ; involucel none ; carpels obtusely beaked, crested and 

 strongly wrinkled on the back. (Sida alcasoides, Michx.) Barren oak lands, 

 Tennessee. 



3. MALVASTRUM, Gray. 



Involucel 1-3-leaved or none. Styles 5-20. Stigmas capitate. Carpels 

 beaked or beakless, 1 -seeded. Seed ascending. Embryo curved or annular. 

 Radicle inferior. Herbs or shrubby plants, rough with rigid hairs. Flowers 

 yellow. 



1 . M. tricuspidatum, Gray. Perennial or shrubby ; stem branching ; 

 leaves ovate or oblong-ovate, serrate, acute, petioled ; stipules lanceolate ; flow- 

 ers in leafy spiked racemes ; petals obliquely truncated ; carpels 10-12, more or 

 less distinctly 3-toothed or awned at the apex. South Florida. Stems 1 high. 

 Involucel 3-leaved. 



2. M. angustum, Gray. Annual ; stem erect, branching ; leaves lanceo- 

 late, sparingly serrate, short-petiolcd ; stipules bristle-like ; flowers axillary, 

 mostly solitary ; involucel setaceous, 2 -3-leaved; carpels 5, circular, awnless, 

 at length 2-valved. (Sida hispida, Pursh. ? Ell. ?) South Carolina and west- 

 ward. Stems 6'- 12' high. Calyx enlarged in fruit. 



4. SIDA, L. 



Involucel none. Calyx angular. Styles 5 -15. Stigmas capitate. Ovaries 

 1 -celled. Carpels erect, mostly 2-valved and 2-beaked at the apex, separating 

 at maturity from each other, and from the central axis. Seed resupinate, sus- 

 pended, 3-angled. Embryo curved. Radicle superior. Branching herbs or 

 shrubs, with chiefly undivided leaves, and small yellow or reddish flowers in 



their axils. 



* Leaves, at least the lower ones, cordate : carpels 5. 



1. S. spinosa, L. Annual, minutely pubescent; branches erect; leaves 

 oblong-ovate, acute, serrate, the slender petioles often with a tubercular spine at 

 the base, the lower ones cordate ; stipules setaceous, half as long as the petioles ; 

 flowers single or clustered, on short erect peduncles ; carpels faintly reticulated, 

 each pointed with two erect subulate spines. "Waste places, Florida and north- 

 ward. July - September. Stems 1 - 2 high. Flowers ' wide, yellow. 



2. S. supina, L'Her. Perennial, tomentosc ; stems divided at the base 

 into slender simple ascending or prostrate branches ; leaves all round-cordate, 

 crenate, rounded at the apex, hoary beneath ; the slender petioles spineless at 

 the base ; stipules minute, subulate, deciduous ; flowers solitary ; the peduncles 

 half as long as the petioles and reflexed in fruit ; carpels downy, reticulated, 

 almost beakless, opening irregularly near the membranaceous base. (S. ovata, 

 Cav. S. procumbens, Swartz.) South Florida. October. Stems 6' -12' 



