562 MALVACEAE 



nearly so, about 2.5 cm. long, cuneate and slightly emarginate. Sphaeralcea 

 Crandallii Rydb. Mountains: Colo. Submont. 



2. P. rivularis (Dougl.) Rydb. Stem 6-20 dm. high, sparingly stellate; 

 leaf-blades cordate or reniform in outline, 5-7-lobed, 5-15 cm. long and about as 

 wide; lobes triangular or broadly lanceolate, usually coarsely toothed; pedicels 

 and calyx stellate; petals pink or white, 2-2.5 cm. long. S. rivularis Torr. 7. 

 rivularis and /. angulata Greene. Along streams: Alta. S.D. Colo. Nev. 

 B.C. Submont. Mont. Jl-S. 



3. P. acerifplia (Nutt.) Rydb. Stem 5-10 dm. high; leaf-blades cordate or 

 reniform in outline, 5-7-lobed, 5-10 cm. broad; lobes triangular, coarsely serrate; 

 petals rose-colored, 2-2.5 cm. long. Sphaeralcea acerifolia Nutt. Along streams: 

 Mont. Ida. Ore. Submont. Je. 



4. P. grandiflora Rydb. Stem glabrous below, stellate above, 1-2 m. 

 high; blades cordate or reniform in outline, 9-15 cm. wide, deeply 5-7-lobed; 

 lobes lanceolate or triangular, coarsely toothed, with triangular teeth; pedicels 

 and calyx densely hirsute-pubescent, with long stellate hairs; petals pinkish, 3 

 cm. or more long. Sphaeralcea grandiflora Rydb., not Phil. Mountains: Colo. 

 Utah. Submont. Mont. Je. 



6. EREMALCHE Greene. 



More or less hispid or hirsute annuals, not stellate. Leaves alternate, reni- 

 form, palmately ribbed, crenate or lobed. Flowers solitary, axillary, long- 

 peduncled, subtended by 3 slender bractlets. Sepals 5, partially united. Petals 

 5, purplish. Stamens monadelphous, in a single series. Carpels orbicular, 

 rugose, pointless, closely investing the single seed. 



1. E. exilis (A. Gray) Greene. Annual; stem branched, spreading or de- 

 cumbent, more or less pubescent, with branched hairs; leaves long-petioled ; 

 blades reniform, 5-7-lobed, 1-2 cm. wide; lobes cuneate, with 3-5 rounded teeth; 

 sepals triangular-lanceolate, acuminate; petals white or pink, 6-10 mm. long; 

 carpels 2 mm. long, reniform, with thick rugose backs. Malvastrum exile A. Gray. 

 Sandy places: Ariz. s Utah Calif.; n Mex. L. Son. Ap-Je. 



7. DISELLA Greene. 



Canescent, stellate perennials. Leaves alternate, pubescent, reniform, or 

 hastate. Flowers perfect, solitary or clustered in the axils of the leaves. Bract- 

 lets 1-3. Sepals 5, united into a usually angular base. Petals 5; carpels five to 

 many, 1-celled. Styles filiform; stigmas capitate. Carpels 1-seeded, inde- 

 hiscent or partially 2-valved, obtuse or short-acuminate. Seeds pendulous, 

 3-angled. 



Leaves reniform or orbicular. 1. D. hederacea. 



Leaves lanceolate, hastate. 2. D. sagittaefolia. 



1. D. hederacea (Dougl.) Greene. Perennial, with a cespitose caudex or 

 rootstock; stems decumbent or spreading, branched, 1-4 dm. long, scurf y- 

 canescent; leaf -blades reniform or suborbicular, dentate, scurfy-canescent, 1-5 

 cm. wide; petals pale yellow or white, about 1 cm. long; fruit short-conic, tomen- 

 tulose. Sida hederacea (Dougl.) Torr. Low banks and salt-flats : Wash. Utah 



Ariz. w Tex. Mex. Son. Submont. Je-S. 



2. S. sagittaefolia (A. Gray) Greene. Cespitose perennial; stems spread- 

 ing or decumbent 1-4 dm. long, scurf y-lepidote; leaf-blades sinuate-dentate, 

 2-5 cm. long, scurf y-lepidote, silvery when young; petals yellowish white, tinged 

 with rose or purple, about 12 mm. long; fruit depressed. Sida lepidota sagittae- 

 folia A. Gray. Plains: w Tex. s Colo. s Calif.; n Mex. Son. My-N. 



8. ABUTILON (Tourn.) Mill. INDIAN MALLOW, VELVET LEAF. 



Herbs (ours), shrubs, or trees. Leaves alternate, softly pubescent, entire, 

 toothed, or lobed, usually cordate at the base. Flowers perfect, mostly axillary. 

 Involucel wanting. Sepals 5, united below. Petals 5, distinct, usually yellow. 

 Styles filiform or club-shaped, with terminal stigmas. Carpels 1-celled, leathery 



