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 

 5-9-lobed, those of the upper 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. 



Mostly 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- 

 trum A. Gray.] 



Leaves lanceolate; fruit ellipsoid to ovate. 



Carpels with a cusp. 1- S. cuspidata. 



Carpels rounded at the apex. 2. S. angush folia. 



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



ellipsoid. 

 Leaves merely toothed or round-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. caespitosa. 



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



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



more racemiform. 4. S. ambigua. 



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. Munroana. 



Carpels without a thread; 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 down, the terminal lobe acute. 



8. 5. subrhomboidea. 



Leaf-blades divided to near the base. 



Upper seedless portion of the carpels at least as large as the lower ret 



seed-enclosing portion. 

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



calvx' fruit ellipsoid 9. o. Rusbyi. 



Plant grayish or whitish, densely stellate; bractlets scarcely half as long as the 



calyx; fruit depressed-globose. 

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



about 12 mm. long. IQS.grossulariaefolia 



Primary divisions of at least the upper leaves with linear 



corolla 910 mm long 

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



lower reticulate portion. 

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



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



Planf l^-fdm. Wghf middle segment of the leaves slightly longer 



than the others; raceme crowded. 

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



loneer than the others ; raceme elongate. 

 Leaves 5-|Sted to^he base; segments all cleft into linear or hiiear-oblong 



lobes Qijoti lu. 



Primary divisions of the leaves Linear, not lobed. 



