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 Chbeses. — Introduced in some localities in this range. 



3. SIDALCEA Gray 



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

 showy, purple, rose-colored, or white. Bria,ctletsnone. Calyx 5-cleft. Stamen- 

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

 indehiscent, l-eeeded, 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. highj from creeping rootstocks, leafy below: lower leaves orbicular, 

 5-19 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, 6-8-lobed, the lobes with 2-3 broad teeth; the upper deeply 

 divided or csleft to the base into linear divisions: inflorescence dgnsely stellate- 

 pubescent, rather few-flowered: calyxJobes 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. 23. 1848. 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 3rJobed 

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

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

 and glabrous.— iSouthem Wyoming to New Mexico. 



4. MALVASTRUM Gray. False Mallow '' 



Herbaceous perennials, often tufted, with stellate-^ubeiscent, 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- 

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

 thesoUtary seed. -' . 



Leaves greenish, with cuneate or oblong segments. 



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



Stems low, bushy-branched, spreading 2. M. coccineiim. 



Leaves hoary-white, with linear segments. 



Herbaceous; pubescence stellate . • . ■ , . « . . 3. M. dissectum. 



. Woody at base; pubescence lepidote . . : , . . 4. M. leptophylltmi. 



1. Malvastrumelatum(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-oleft, 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. 31. 1848, Somewhat 



