FLOWERING PLANTS AND FERNS OF ARIZONA 573 



Key to the species 



1. Petals not more than 6 mm. long, the claws glabrous; carpels sharply and 

 radiately rugose on the sides, reticulate on the back. 1. M. parviflora. 

 1. Petals 10 to 15 mm. long, the claws bearded; carpels smooth or nearly so. 



2. M. XEGLECTA. 



1. Malva parviflora L., Amoen. Acad. 3: 416. 1756. 



Coconino, Pinal, Maricopa, Cochise, and Pima Counties, a common 

 field weed, March to September. 



2. Malva neglecta Wallr., Syll. Ratisb. 1: 140. 1824. 



Malva rotund if olia of authors. Not L. 



Coconino, Yavapai, and Gila Counties. 



6. SIDALCEA 



Plants perennial, herbaceous above the caudex, sparsely pubescent; 

 leaf blades palmately lobed or cleft, the lower ones orbicular or nearly 

 so, sometimes merely crenate; flowers showy, short-pedicelled, in 

 terminal, bracted racemes; involucel none; petals 1.5 to 2.5 cm. long; 

 style branches filiform, introrsely papillate; carpels few, indehiscent, 

 smooth or reticulate on the sides. 



1. Sidalcea neomexicana A. Grav, Amer. Acad. Arts and Sci. Mem. 

 ser. 2, 4: 23. 1849. 



Apache County to Coconino and Yavapai Counties, also in the 

 Huachuca Mountains, Cochise County {Lemmon 2646), 5,000 to 9,000 

 feet, frequent in wet meadows and along streams, June to September. 

 Wyoming and Idaho to northern Mexico and California. 



A handsome plant, with stems up to about 1 m. long and large, 

 commonly mauve-colored flowers. Reported to be sometimes used 

 as greens by the Indians. 



7. MALVASTRUM 



Plants annual or perennial, herbaceous or shrubby, sparsely to 

 densely stellate-pubescent, or hispid; leaf blades ovate to orbicular, 

 crenate or palmately cleft; flowers axillary, or in terminal, bracted 

 inflorescences; calyx subtended by an involucel of narrow bractlets; 

 petals yellow or purple; carpels few, compressed or somewhat turgid, 

 rugose on the sides, sometimes tuberculate on the back, indehiscent. 



Key to the species 



1 . Plant shrubby; leaf blades ovate, crenate-dentate, sparsely to densely stellate- 

 canescent; petals orange yellow; carpels rather thick, with coriaceous walls, 

 radiately rugose on the sides, with 2 conical processes or cusps on the back. 



1. M. BICUSPIDATUM. 



1. Plants herbaceous, annual; leaf blades orbicular or nearly so; petals purple or 



nearly white; carpels thin-walled, not appendaged on the back (2). 



2. Leaf blades merely coarsely crenate; stems and petioles hispid with hum, 



mostly simple hairs; petals 15 to 20 mm. long, conspicuously spotted at 



base, lilac or mauve drying violet-purple; carpels many more than 15, 



thin, flat, black at maturity, reticulate near the edges. 



2. M. KOTrxniFoi.irM. 

 T. Leaf blades palmately cleft, with rounded lobes; pubescence mostly stellate; 

 petals not more than 6 mm. long, not spotted, lavender ov whitish; car- 

 pels not more than 15, somewhat turgid, not becoming black, trans- 

 versely rugose 3. M. exile. 



