620 pi v 



Staminate flowers' with 15 20 anthers borne at the summit of the stamen-column. 



Pistillate Bowers with 8-10 styles, stigmatic along their inner surface, the stamen- 

 column present but destitute of anthers. Cavities of the ovary as many as the 

 styles, i-ovuled. Carpels 8-10, separating at maturity from the axis, beakless, but 

 minutely tipped, imperfectly 2-valveJ. Seed ascending. [Greek, a dell.] A mo- 

 notypic genus of the east-central U. S. 



1. Napaea dioica L. Glade Mallow. (I. F. f. 2424.) Simple, or branch- 

 ing above. 1-3 m. high. Basal and lower leaves 1. 5-3 dm. broad, long-petioled, 

 orbicular, 7-1 [-parted, the divisions acute, dentate and lobed; upper leaves smaller, 

 short-petioled, 5-9-lobed, the lobes incisely cut, acute or acuminate; staminate 

 flowers 1 2-18 mm. broad, the pistillate somewhat smaller; petals obovate, 2-3 

 times the length of the calyx; carpels strongly i-nerved, slightly rugose-retic- 

 ulate. In moist grounds, southern Penn. to Va., Tenn., Minn, and Iowa. July. 



5. MALVASTRUM A. Gray. 



Herbs, with entire cordate or divided leaves, and solitary or racemose, short- 

 pedicelled perfect flowers. Calyx 5-cleft. Bracelets of the involucels small, 1-3 

 or none. Cavities of the ovary 5-00 , i-ovuled. Style-branches of the same 

 number, stigmatic at the summit only, forming capitate stigmas; carpels inde- 

 hiscent or imperfectly 2-valved, falling away from the axis at maturity, their 

 apices pointed or beaked. Seed ascending. [Greek, star-mallow.] About 75 

 species, natives of America and S. Africa. In addition to the following, about 

 12 others inhabit the southern and western U. S. 



Leaves lanceolate-oblong or linear-oblong, dentate. 1. M. angustum. 



Leaves pedately 3-5-parted, the lobes incised. 2. M. coccineum. 



i. Malvastrum angustum A. Gray. Yellow False Mallow. (I. F. f. 

 2425.) Annual, pubescent with appressed hairs, 1.5-3 dm. high. Leaves oblong 

 lanceolate, or linear-oblong, petioled, acute, finely dentate, 1.5-4 cm. long; flowers 

 yellow, 8-12 mm. broad, mostly solitary in the axils of the upper leaves, short- 

 peduncled; bractlets of the involucre linear, shorter than the ovate-triangular 

 pubescent acute calyx-lobes; petals about equalling the calyx; carpels 5, some- 

 what pubescent, reniform, 2-valved at maturity. In dry ground, Tenn. and 111. 

 to Iowa and Kans. Summer. 



2. Malvastrum coccineum (Pursh.) A. Gray. Red False Mallow. (I.. F. 

 f. 2426.) Perennial, 1-2. 5 dm. high, densely and silvery stellate-pubescent. Lower 

 leaves 2-5 cm. wide, ovate-orbicular, petioled, pedately 3-5-parted; lobes cuneate 

 to linear, incised; flowers red, 12-18 mm. broad, in dense short terminal racemes; 

 bractlets commonly none; petals much longer than the lanceolate calyx-lobes; 

 carpels 10-15, rugose-reticulated, indehiscent, 1 -seeded (rarely 2-seeded). Prai- 

 ries, Manitoba to S. Dak., Neb., Tex., Br. Col. and N. Mex. May-Aug. 



6. si da L. 



Herbs, with serrate crenate or lobed leaves, and perfect flowers. Bractlets of 

 the involucels none. Calyx 5-toothed or 5-cleft. Cavities of the ovary 5-00 , I- 

 ovuled; style-branches of the same number, stigmatic at the summit. Carpels 

 indehiscent, or at length 2-valved at the apex. Seed pendulous. [Greek, used 

 by Theophrastus.1 About 75 species, natives of the warmer parts of America, 

 Asia, Africa and Australasia. Besides the following, some 17 others occur in the 

 southern U. S. 

 Leavefl linear, ovate or oblong, toothed. 



Leaves ovate or oblong-lanceolate; flowers 4-8 mm. broad. 1. S. spinosa. 

 1 linear or Linear-oblong; flowers 12-25 nun. broad. 2. S. ElliottiL 



I palmately lobed, or palmately veined. 



GlabrOUS or nearly so, tall; flowers in terminal panicles. 3. S. her?naphrodita. 



Densely stell&te-cunescent; low; flowers axillary. 4. S. hederacea. 



I. Sida spinosa L. PRICKLY SlDA. (I. F. f. 2427.) Annual, finely pubes- 

 cent, 3 dm. high. Leaves ovate to oblong-lanceolate, 2-5 cm. lon^. petioled, 

 truncate or cordate at the base, crenate-dentate ; flowers axillary, short-peduncled, 

 yellow; peduncles shorter than the petioles; calyx teeth triangular, acute; carp- 

 els 5, dehiscent at the apex into .: beaks; stipules linear; petioles of the larger 



