MALLOW FAMILY 155 



Pubescence, especially that of tlie calyx and stem, stellate, without any longer hairs. 

 Petals about 10 mm. long; carpels smooth. 2. S. oregana. 



Petals 15-20 mm. long; carpels reticulate on the back. 3. S. nervala. 



Pubescence of the caly.x and the stem at least with some scattered long hairs. 

 Calyx -lobes lanceolate; stem mostly single, erect. 



Calyx stellate, with longer hairs on the margins; carpels puberulent, reticulate 



on the back. 4. S. campestris. 



Calyx hirsute, with branched hairs; carpels smooth and glabrous. 



5. S. neomexicana. 

 Calyx-lobes ovate, glandular-puberulent and with a few scattered long hairs; 

 stems usually several, decumbent at the base. 6. S. crenulata. 



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



Leaves lanceolate; fruit elUpsoid to ovate. 



Carpels with a cusp. 1. S. cuspidata. 



Carpels rounded at the apex. 2. S. anguslifolia. 



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 roimded-rhombic, 



coarsely toothed. 3. S. caespitosa. 



Plant tall, 3-0 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^ mm. long, merely acute, not longer than the fruit; inflores- 

 cence thyrsoid. 

 Leaves lobed less than half-way down. 



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



few-toothed; ternmial lobe mostly acute. 5. S. Munroana. 



Carpels without a tliread; leaves densely ci-enate; 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. S. subrhotnboidea. 

 Leaf-blades divided to near the base. 



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

 seed-enclosmg portion. 

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



calyx; fruit ellipsoid. 9. S. Rusbyi. 



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

 calyx; fruit depressed-globo.se. 

 Primary di^isions of the leaves cuneate, with romided-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. digitata. 



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 sUghtly longer 



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



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

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



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

 lobes. 14. S. dissecla. 



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



5. PHYMOSIA Desv. Wild Hollyhock, Maple-leaved Mallow. 



Sepals lanceolate or ovate-lanceolate, long-attenuate; bractlets subulate, three-fourths 

 as long as the sepals. 1. P. Crandallii. 



Sepals broadly triangular-ovate, acute; bractlets scarcely more than half as long as the 

 sepals. 

 Calyx and pedicels stellate; bractlets subulate; petals 2-2.5 cm. long. 



Plant sparingly stellate, green. 2. P. rinilaris. 



Plant densely stellate-canescent. 3. P. acerifolia. 



Calyx and pedicels lilrsute with branched hairs; bractlets lanceolate; petals 3 cm. 

 or more long. 4. P. grandiflora. 



6. EREMALCHE Greene. i. E. exilis. 



7. DISELLA Greene. 



Leaves reniform or orbicular. 1. D. hederacea. 



Leaves lanceolata, hastate. 2. D. sagillaefolia. 



8. ABUTILON (Tou-n.) Mill. Indian M.\llow, Velvet Leaf. 



1. A. parvulum. 



