MALLOW FAMILY 559 



with lanceolate or linear lobes; calyx 8-9 mm. long, its lobes lanceolate, long- 

 acuminate; petals rose or lilac, 15-20 mm. long. Hills and plains: B.C. — Mont. 

 — Ida. — n Calif. My-Je. 



5. S. neomexicana A. Gray. Stem 6-20 dm. high; blades of the basal leaves 

 rounded-reniform, 3-10 cm. wide, hirsute, crenate and more or less distinctly 

 o-9-lobed, those of the ui)per stem-leaves divided into linear or oblong divisions; 

 petals lilac, rarely rose or white, 12-18 mm. long. Mountain valleys: Wyo. — 

 N.M. — Ariz.— Ida.; Mex. Submont. — Mont. Je-S. 



6. S. crenulata A. Nels. Stems 2-5 dm. high, green, nearly glabrous, with 

 a few scattered hairs; leaf -blades sparsely appressed-pubescent, with forked 

 hairs, those of the basal leaves orbicular-reniform, 2-5 cm. broad, crenate, those 

 of the stem-leaves 5-9-lobed or cleft, the uppermost with linear divisions; inflor- 

 escence racemose; calyx about 6 mm. long; lobes lanceolate, acute, or short- 

 acuminate; petals 12-15 mm. long; carpels smooth or slightly reticulate on the 

 back. Meadows and draws: Utah — Nev. Son. Je-Jl. 



4. SPHAERALCEA St. Hil. Globe Mallow, Scarlet Mallow. 



Mostty perennial herbs, often cinereous, with stellate or branched hairs. 

 Leaves alternate, with palmately lobed or dissected blades. Flowers mostly in 

 terminal spike-like racemes, subtended by 1-3 bractlets. Sepals 5, partially 

 united. Petals 5, golden, pink, or scarlet, usually notched. Stamens mon- 

 adelphous in a single series. Stigmas truncate or capitate. Carpels 5 or more; 

 the lower portion of each enclosing 1 or 2 seeds, reticulate on the sides facing the 

 adjacent carpels, the upper portion of the carpels smooth and empty. [Malvas- 

 irum A. Gray.] 



Leaves lanceolate; fruit ellipsoid to ovate. 



Carpels with a cusp. 1. S. cuspidata. 



Carpels rounded at the apex. 2. 5. angustifolia. 



Leaves rounded or rhomboid to reniform in outline; fruit depressed-globose to broadly 

 ellipsoid. 

 Leaves merely toothed or roimd-lobed, or at most cleft half-way down. 



Plant low and depressed, 1 or rarely 2 dm. high; leaf-blades rounded-rhombic, 



coarsely toothed. 3. S. caespilosa. 



Plant tall, 3-6 dm. high; leaf-bladas round-lobed. 



Caly.x-lobes 5-7 mm. long, acuminate, longer than the fruit; inflorescence 



more racemiform. 4. S. artibigua. 



Calyx-lobes 3-4 mm. long, merely acute, not longer than the fruit; inflores- 

 cence thyrsoid. 

 Leaves lobed less than half-way down. 



Capsule separating from the axis by means of a thread ; leaves coarsely 



few-toothed; terminal lobe mostly acute. 5. S. Muriroana. 



Carpels without a tliread; leaves densely crenate; terminal lobe rounded. 

 Calyx sparingly stellate, except at the base and on the margins of 



the lobes. 6. S. marginata. 



Calyx densely stellate throughout. 7. S. arizonica. 



Leaves 3-cleft half-way dowo, the terminal lobe acute. 



8. S. subrhomboidea. 

 Leaf-blades divided to near the base. 



Upper seedless portion of the carpels at least as large as the lower reticulate and 

 seed-enclosing portion. 

 Plant green, only slightly stellate; bractlets about two-thirds as long as the 



calyx; fruit ellipsoid. 9. 5'. Rusbyi. 



Plant grajash or wliitish, densely stellate; bractlets scarcely half as long as the 

 calyx; fruit depressed-globose. 

 Primary divisions of the leaves cuneate, with rounded-ovate lobes; corolla 

 about 12 mm. long. 10. S. grossulariaefoHa. 



Primary divisions of at least the upper leaves with linear divisions; 

 corolla 9-10 mm. long. 11. S. digitala. 



Upper smooth seedless portion of the carpels very small, much smaller than the 

 lower reticulate portion. 

 Primary divisions of the leaves rather broad, cleft or lobed. 



Leaves 3-parted; lateral segments deeply 2-cleft; lobes broadly oblong, 

 oblanceolate, or obovate. 

 Plant low, 1-2 dm. liigh; middle segment of the leaves slightly longer 



than the others; raceme crowded. 12. S. coccinea. 



Plant tall, 3-4 dm. high; middle segment of the leaves usually half 

 longer than the others; raceme elongate. 13. S. elala. 



Leaves 5-parted to the base ; segments all cleft into linear or linear-oblong 

 lobes. 14. S. dissecta. 



Primary divisions of the leaves linear, not lobed. 15. S. leptophylla. 



