FLOWERING PLANTS AND FERNS OF ARIZONA 771 



4. TRICHOSTEMA. Bluecttrls 



A small half -shrub, woody at base; flowering stems mostly annual, 

 dying back, puberulent and glandular; leaves oval or ovate, usually 

 obtuse, entire, usually shorter than the internodes; flowers in cymes, 

 these in the axils of the upper reduced leaves or bracts; calyx equally 

 5-lobed, the lobes obtuse, about equal to the tube, the latter hemi- 

 spheric in fruit; corolla twice as long as the calyx; stamens ascending 

 between the upper lobes of the corolla, strongly curved and exserted; 

 nutlets pitted or wrinkled, somewhat hirtellous. 



1. Trichostema arizonicum A. Gray, Amer. Acad. Arts and Sci. Proc. 



371. 18 



Cochise, Santa Cruz, and Pima Counties, 3,500 to 5,500 feet, rocky 

 slopes, August and September, type from the Chiricahua Mountains 

 (Wright 1541). Southern New Mexico and Arizona, and northern 

 Mexico. 



5. SALAZARIA. Bladder-sage 



A subspinose shrub with divaricate branches and inconspicuous 

 leaves; flowers in the axils of small bractlike leaves; calyx equally 

 2-lipped, the lips entire, becoming inflated at maturity into a papery 

 bladder enclosing the nutlets; corolla violet and white, tubular, the 

 limb relatively short, the lateral lobes more or less joined with the 

 upper lip to form a galea, this including the stamens and style; 

 stamens 4, paired; nutlets roughened. 



1. Salazaria mexicana Torr., U. S. and Mex. Bound. Bot. 133. 1859. 



Mohave, Yavapai, Maricopa, and Yuma Counties, usually below 

 3,000 feet, foothills and washes in the creosotebush association, reach- 

 ing the margin of the juniper association. Western Texas to southern 

 Nevada, Arizona, southern California, and northern Mexico. 



This plant is reported to furnish forage for livestock throughout the 

 year, in the drier parts of the State. The flowers and bladderlike 

 fruits (see pi. 17) are attractive. 



6. SCUTELLARIAE Skullcap 



Small perennial herbs, either with few stems and slender spreading 

 rhizomes, or with several stems ascending from a woody caudex ; leaves 

 petiolate, entire or crenate-serrate ; flowers axillary in the upper part 

 of the plant, or borne in lateral racemes and subtended by lea Hike 

 bracts; corolla violet, tubular, the limb relatively short, the lateral 

 lobes more or less joined with the upper lip to form a galea, this includ- 

 ing the stamens and style; stamens 4, in pairs, with 1 anther sac 

 abortive in the lower pair; nutlets variously tuberculate. 



Key to the species 



1. Plants with spreading slender rhizomes; leaves deltoid-ovate or oblong, crenate- 

 serrate, mostly 3 to 7 cm. long; nutlets buff- or straw-colored (2). 

 2. Galea and tube of the corolla 5 to 7 mm. long; flowers in lateral bracteate 



racemes 1. S. lateriflora. 



2. Galea and tube of the corolla 13.5 to 21 mm. long; flowers in the axils of the 

 upper leaves 2. S. galericulata. 



29 Reference: Epling, Carl, notes on the Scutellariae of western north America. Madrono 5: 

 49-72. 1939. 



