324 MALVACE^. Sida. 



calyx canescent-tomentose, lO-angled below: petals quarter incli long, tawny yellow : carpels 

 sparsely rugose, their awns commonly of about the same length anU retrorsely hirsute (but 

 rarely obsolete). — Spec. ii. 684 (Dill. Elth. t. 171); Cav. Diss. i. t. 3, f. 2. S. multijiora, 

 herbacea, micans, rotimdifolia, &c., Cav. 1. c. S. althceifolia, Swartz, Frodr. 101. — Keys of 

 Florida. (W. Ind. to S. Am., and most tropical shores.) 

 S. tragiaefolia, Gkay. Perennial, 2 feet high, stellular-pubescent or puberulent : leaves 

 subcordate-oblong, obtuse (half inch to nearly 2 iuclies long), coarsely dentate, upper face 

 glabrate : flowers mostly solitary in the axils and sleuder-peduncled : calyx membranaceous 

 in age and barely pubescent, with somewhat 10-augled base: petals orange-yellow, some- 

 times half inch long : carpels with thin sides rugose-reticulated below, smooth towards the 

 obtuse 2-mucronate apex which is green and partly bifid dorsally. — PI. Lindh. pt. 2, 164. — 

 S. Arizona, Wright (seeds, plant raised in Bot. Garden), Pringle, Lemmon, an ambiguous 

 smaller-leaved form, more cinereous with minute pubescence. (Coahuila, Mex., Palmer.) 

 4— ^^ H— Stems erect, brandling : leaves slender-petioled, truncate-obtuse or retuse at base, 

 from ovate-oblong to linear ; a small blunt or pointed hard tubercle usually underneath 

 base of petiole, but sometimes obsolete : flowers small, nearly all short-peduncled, commonly 

 clustered in the axils : calyx-lobes deltoid : carpels .5 or rarely more, reticulate-rugose and 

 sometimes tuberculate, variably 2-dentate or 2-awned at tip : annuals becoming suffruticose 

 in the tropics. 

 S. spinosa, L Green and minutely puberulent, or upper face of the oblong-ovate or ob- 

 long-lanceolate serrate leaves glabrous and lower subcauescent : petals pale yellow, 2 or 3 

 lines long. — Spec. ii. 683 ; Walt. Car. 176 ; Cav. Diss. i. 11, t. 1, f. 9 ; Torr. & Gray, Fl. i. 

 231 ; Gray, Gen. 111. ii. t. 123. — Waste grounds from S. New York to Kansas and south- 

 ward, probably introduced weed, but in the Gulf States and Texas perhaps indigenous. 

 (Most tropics.) 

 S. angustifolia, Lam. Canescent: branches virgate : leaves linear or narrowly lanceolate, 

 or some of the lower linear-oblong, obtuse, 1 to 4 lines wide, crenately serrulate ; petiole 

 shorter, the tubercle under it often obscure or wanting, but sometimes manifest : otherwise 

 very like the preceding, but hardly passing into it. — Diet. i. 4; Cav. Diss. i. 14, t. 2, f . 2 ; 

 Gray, PI. Wright, i. 19, ii. 21. S. linearis, Cav. Ic. iv. 6, t. 312, f. I. S. /(eferoca?-pa, Engelm. 

 in Gray, PI. Lindh. pt. 2, 163. S. spinosa, var. angustifolia, Griseb. Fl. W. Ind. 74. — Texas 

 and Arizona. (Mex. to Trop. Am., &c.) 



-1— -1— -I— -)— Stems erect : leaves mainly short-petioled or subsessile, acute or obtuse but 

 never cordate at base, usually quite destitute of tubercle under the petiole. 



•H- Cuneate-obovate or oblong-ovate to lanceolate leaves green or at most cinereous-puberu- 



lent, serrate or serrulate, the base entire : stems branching and leafy to the top : carpels 



8 to 10 : annuals in the U. S., suffruticose perennials in the tropics. 



S. rhombif olia, L. Leaves from rhombic-oblong or ovate-cuneate to oblanceolate, obtuse, 



pale and cinereous-puberulent beneath ; occasionally an obscure tubercle under the petiole ; 



stipules setaceous, caducous : peduncles all or some of them elongated : calyx minutely 



cinereous-puberulent, the base at maturity with .5 to 10 nerves callous-thickened: petals pale 



yellow, sometimes red at base, about quarter inch long : carpels smoothish, subulately 1- 



awned, at least until dehiscence or fission, which is uncommon. — Spec. ii. 684 (Malvinda 



unicornis, &c., Dill. Elth. 216, t. 172, f. 212) ; Cav. Diss. t. 3, f. 12; Gray, Bot. U. S. Expl. 



Exped. 158 ; Griseb. Fl. W. Ind. 74. — A weed in waste grounds, N. Carolina to Florida and 



Texas; probably not indigenous. (Most tropics.) 



Var. Canariensis, Griseu. 1. c. Carpels with two short awns or points or soon de- 

 hiscent into two, sometimes almost pointless. — S. Canariensis, Willd. Spec. iii. 735. S. 

 Hondensis, HBK. Nov. Gen. & Spec. v. 261 . S. Madererisis, Lowe, Trans. Camb. Phil. Soc. 

 iv. 35. iS'. ocidata, Lowe, Fl. Mader. 592. — S. Carolina, Florida, &c. ; an occasional ballast- 

 weed as far north as Pennsylvania. (Most tropics.) 



S.* acuta, BuRii.i Glabrous or minutely puberulent, much branched : leaves green, rather 

 narrowly lanceolate, acute or acuminate, veiny, unequally serrate: stipules conspicuous, 



1 This species was called <S. carpinifolia by Dr. Gray, but the name of Linnaeus, f., has now fjen- 

 crally given place to the earlier one of Burmann. Slight changes have been made in Dr. Gray's 

 description to exclude the var. carpinifolia. 



