MALVACEAE (MALLOW FAMILY) 317 



1. Malva rotundifolia L. Sp. PI. 688. 1753. Stems procumbent from a 

 biennial root: leaves round-cordate, on very long petioles, crenate, obscurely 

 lobed: flowers clustered in the axils, pale blue or whitish, 10-12 mm. broad, 

 on pedicels 2-4 cm. long: carpels about 15, rounded on the back, pubescent. 

 COMMON MALLOW or CHEESES. Introduced in some localities in this range. 



3. SIDALCEA Gray 



Perennial herbs with rounded and mostly lobed or parted leaves. Flowers 

 showy, purple, rose-colored, or white. Bract lets none. Calyx 5-cleft. Stamen- 

 tube double. Styles united below, stigmatic on the inner face; carpels 5-9, 

 indehiscent, 1-seeded, beakless. 



Flowers white .1. S. Candida. 



Flowers rose-color. 



Stems glabrous below 2. S. nervata. 



Stems hirsute-pubescent . . . . . . . . 3. S. neo-mexicana. 



1. Sidalcea Candida Gray, PI. Fendl. 20. 1848. Glabrous or nearly so, 

 5-8 dm. high, from creeping rootstocks, leafy below: lower leaves orbicular, 

 5-10 cm. in diameter, about 7-lobed, somewhat ciliate, the segments coarsely 

 toothed; the upper leaves lobed or parted, with entire lanceolate segments: 

 flowers spicate: calyx-lobes deltoid: petals white or shading to cream-color, 

 10-14 mm. long: carpels 9 or 10, nearly smooth and glabrous. Along streams; 

 from Wyoming and Utah to New Mexico. 



2. Sidalcea nervata A. Nels. Proc. Biol. Soc. Wash. 17: 94. 1904. Gla- 

 brous below, minutely stellate-pubescent above, 4-7 cm. high: stems usually 

 somewhat branched above: leaves strongly veined below; the basal long- 

 petioled, orbicular, G-8-lobed, the lobes with 2-3 broad teeth; the upper deeply 

 divided or cleft to the base into linear divisions: inflorescence densely stellate- 

 pubescent, rather few-flowered: calyx-lobes triangular-lanceolate: petals 

 broadly obovate, emarginate, about 2 cm. long: fruit slightly depressed, the 

 carpels glabrous, rugose-reticulated on the dorsal angles. Western Wyom- 

 ing and westward. 



3. Sidalcea neo-mexicana Gray, PI. Fendl. 2:5. 1S4S. Hirsute-pubescent on 

 the slender stems, 3-9 dm. high, more or less branched: radical leaves orbicu- 

 lar, 5-9-lobed or incisely crenate; stem leaves parted, the segments 3-lobed 

 or those of the uppermost entire: raceme many-flowered, the pedicels some- 

 times longer than the hirsute calyx: petals about 12 mm. long: carpels smooth 

 and glabrous. Southern Wyoming to New Mexico. 



4. MALVASTRUM Gray. FALSE MALLOW 



Herbaceous perennials, often tufted, with stellate-pubescent, entire, cordate 

 or divided leaves. Flowers in a narrow naked or leafy raceme, the pedicels 

 short . Calyx 5-cleft, 3-bracted or naked. Petals entire or emarginate. Stamen- 

 tubo single. Stigmas capitate. Carpels 5 or more, each completely filled by 

 the solitary seed. 



Leaves greenish, with cuneate or oblong segments. 



Stems tall, subsimple, erect . . . . . . 1. M. elatum. 



Steins low, bushy-branched, spreading . . . . .2. M. coccineum. 

 Leaves hoary-white, with linear segments. 



Herbaceous; pubescence stellate . . . . . . . 3. M. dissectum. 



Woody at base; pubescence lepidote . . . . . . 4. M. leptophyllum. 



1. Malvastrum elatum (E. G. B.) A. Nels. Bot. Gaz. 34: 25. 1902. Sparsely 

 stellate-pubescent : stems several from a woody root, subsimple, erect, 3-5 dm. 

 high: leaves broadly cuneate in outline, 3-5-cleft, the cuneate divisions again 

 lobed or cleft: the paniculate raceme crowded, silvery-canescent : floral and 

 fruit characters much as in the next. Probably only to the southwest of our 

 range, Utah, etc. 



2. Malvastrum coccineum (Pursh) Gray, PI. Fendl. 21. 1848. Somewhat 



