MALVACEAE. (MALLOW FAMILY.) 41 



* Styles stigmatio down the inner side : carpels iudehiscent : ovules solitary, ascending. 1 



1. Callirrhoe. Bractlets 3, or none. Petals truncate. Carpels beaked. 



2. Sidalcea. Bractlets none. Filaments in a double series, those of the outer series 



united in 5 clusters. Carpels fewer, beakless. 



* * Stigmas capitate : carpels mostly dehiscent at least at the apex. 



3. Malvastrum. Bractlets 1 to 3. Ovule solitary, ascending. 



4. Sphreralcea. Bractlets 1 to 3. Ovules 2, the lower ascending, the upper pendulous. 



5. Abutilon. Bractlets none. Ovules 3 or more in each cell. 



1. CALLIRRHOE, Nutt. 



Petals wedge-shaped (usually red-purple). Carpels 10 to 20, with a short 

 empty beak, separated within from the 1 -seeded cell by a narrow projection. 



1. C. involucrata, Gray. Hirsute: stem branching, procumbent : leaves 

 deeply 3 to ^-parted, covered with stellate hairs, segments linear-lanceolate, 

 laciuiately 3 to 5-toothed : peduncles erect, 1-flowered, longer than the leaves : 

 flowers few in a loose panicle, scarlet : brackets linear-lanceolate : carpels hairy, 

 not wrinkled. Loup Fork of the Platte, S. E. Colorado, and southward. 



2. C. alCBBOideS, Gray. Strigose-pubescent : stems slender : lower leaves 

 triangular heart-shaped, incised ; the upper 5 to 7-parted, laciniate ; the upper- 

 most divided into linear segments : flowers corymbose, rose-color or white : involu- 

 cel none : carpels crested and strongly wrinkled on the back. Valley of the 

 Platte, southward and eastward to Kentucky and Tennessee. 



2. SIDALCEA, Gray. 



Carpels 5 to 9, beakless. Herbs, with rounded and mostly lobed or parted 

 leaves, the usually purple flowers in a narrow terminal raceme or spike. 



1. S. malvaeflora, Gray. Lower leaves 7 to 9-lobed ; cauline more 

 narrowly and deeply 5 to 7-lobed ; segments linear, somewhat toothed : pedicels 

 at first shorter, at length longer than the subulate bracts : flowers purple or white : 

 carpels 7, pointless. From Mexico to Colorado and Oregon. 



2. S. Candida, Gray. Lower leaves orbicular, 7-lobed, segments coarsely 

 3 to 5-toothed or incised ; upper leaves 7-lobed or parted ; the segments lance- 

 olate, entire : pedicels shorter than the bracts : flowers white or cream-color: carpels 

 9 or 10, cochleate-reniform, mucronate. On water-courses in the mountains of 

 Colorado and southward. 



3. MALVASTRUM, Gray. FALSE MALLOW. 



Stamineal tube simple. Carpels 5 or more. Herbaceous tufted peren- 

 nials ; the flowers in narrow naked or leafy subpaniculate racemes. 



1. M. COCCineum, Gray. Low and hoary: leaves b-parted or pedate: 



i Malva, an introduced genus, has 3 distinct bractlets, obcordate petals, and carpels 

 rounded, beakless. 



M. rotundifolia, L., has procumbent stems, round heart-shaped crenate obscurely- 

 lobed leaves on very long petioles, whitish petals twice the length of the sepals, and pu- 

 bescent carpels. The common Mallow. Commonly naturalized along waysides and in 

 cultivated ground. 



