5iS 



MALVACEAE. 



Vol. II. 



4. Callirhoe involucrata (T. & G.) A. Gray. 



I'uri)li; I'upi)) -Mallow. Mg. 2856. 



Nultallia involucrata Nutt. ; Torr. Ann. Lye. N. Y. 

 2: 172. Name only. 1828. 



Malva involucrata T. & G. Fl. N. A. i : 226. 1838. 



Callirhoe involucrata A. Gray, Mem. Am. Acad. 

 (II.) 4; 16. 1848. 



Perennial, branched from a deep root, procum- 

 bent or ascending, I -2 long, pubescent with long 

 hispid hairs. Leaves cordate-orbicular, palmately 

 lobed or palmatifid, the. lobes obtuse or acute, 

 dentate or incised, those of the upper leaves com- 

 monly narrower than those of the lower ; stipules 

 ovate, conspicuous; peduncles terminal and axil- 

 lary, slender, i-flowered; bractlets of the invol- 

 uccl 3, linear, half the length of the lanceolate 

 acute 3-5-nerved calyx-lobes; flowers red-purple, 

 l'-2l' broad; carpels rugose-reticulate. 



In dry soil, Minnesota and Iowa to Texas, Utah 

 and New Mexico and northern Mexico. April-Aug. 



4. NAPAEA [Clayt.] L. Sp. PI. 686. 1753. 



An erect perennial herb, with palmately-lobed leaves, and small white dioecious flowers 

 in ample terminal corymbose panicles. Involucels none. Calyx 5-toothed. Petals _ entire. 

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

 flowers 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-valved. 

 Seed ascending. [Greek, a dell.] 



A monotypic genus of the east-central United States. 



I. Napaea dioica L. Glade IMallow. 

 Fig. 2857. 



Napaea dioica L. Sp. PI. 686. i /Si- 



Simple, or branching above, 4-9 high, pu- 

 bescent or glabrate. Basal and lower leaves 

 6'-i2' broad, long-petioled, orbicular in out- 

 line, 7-il-parted nearly to the base, the divi- 

 sions acute, dentate and lobed; upper leaves 

 smaller, short-petioled, 5-9-lobed, the lobes 

 incisely cut, acute or acuminate ; staminate 

 flowers 6"-9" broad, the pistillate somewhat 

 smaller; petals obovate, 2-3 times the length 

 of the calyx; carpels strongly i-nerved, slightly 

 rugose-reticulate. 



In moist grounds, southern Pennsylvania to 

 Virginia, west to Minnesota, Iowa and Tennessee. 

 July. 



