MALVACEAE. (MALLOW FAMILY.) 41 



* Styles stigmatio down the inner side : carpels indehiscent : ovules solitary, ascending.' 



1. CalHrrhoe. 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. Mai vastrum. Bractlets 1 to ;. Ovule solitary, ascending. 



4. Sphseralcea. 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 5-parted, covered with stellate hairs, segments linear-lanceolate, 

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

 /lowers few in a loose panicle, scarlet : bractlets linear-lanceolate : carpels hairy, 

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



2. C. alcasoides, 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. m alvseflor a, 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 : 

 car/iels 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 5-parted or pedate: 



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

 rounded, beakless 



M. rotwndifolia, 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 iu 

 cultivated ground. 



