FLOWERING PLANTS AND FERNS OF ARIZONA 293 



perianth funnelform, white 2 to 3 cm. long; filaments purple; fruits 

 biturbinate, glandless. 



1. Anulocaulis leisolenus (Torr.) Standi., Contrib. U. S. Natl. Herbar- 

 ium 12: 375. 1909. 



Boerhaaria leisolena Torr., U. S. and Mex. Bound. Bot. 172. 

 1859. 



"Arizona." without definite locality (Wheeler Expedition in 1872) , 

 near Fort Verde, Yavapai County (Mearns 198, Peebles 14411), about 

 3,300 feet, on calcareous soils. Western Texas to southern Nevada 

 and central Arizona. 



10. ABRONIA. Saxdverbexa 



Plants herbaceous, annual or perennial, often viscid-pubescent; 

 stems mostly decumbent or prostrate, leafy or scapose; leaves oppo- 

 site, petioled, with lanceolate, elliptic, or ovate blades; flowers numer- 

 ous, in heads subtended by conspicuous separate thin bracts; perianth 

 funnelform-salverform, the tube slender and elongate, the limb smaU; 

 fruits deeply lobed or winged. 



The sandverbenas are attractive plants, with bright pink to white, 

 more or less fragrant flowers. They are conspicuous in spring in 

 sandy open places, often in dry beds of streams. 



Key to the species 



1. Perianth purplish red; plants annual; bracts linear-lanceolate to ovate-lanceo- 

 late, attenuate-acuminate, herbaceous or not conspicuously scarious, 

 greenish: leaf blades prevailingly ovate (2). 

 2. Stems copiously to densely viscid- villous; fruits mostly broadly winged, the 

 central cavity not extending to the edge of the wings, the latter often 

 surpassing the beak of the fruit and rounded or acutish at apex. 



1. A. VILLOSA. 



2. Stems viscid-puberulent (commonly also sparsely villous) ; fruits mostly with 



winglike lobes, the central cavity extending to the edge of the lobe-, tin- 

 latter considerably surpassed by the beak of the fruit and truncate or 

 subtruncate at apex 2. A. angustifolia. 



1. Perianth with a white or pinkish limb and a greenish tube; plants perennial, the 

 root often thickened and woody; bracts elliptic to suborbicular or obovate, 

 obtuse to short-acuminate, conspicuously scarious, whitish; fruits commonly 

 with winglike lobes (3). 



3. Plant acaulescent or nearly so, cespitose, sparsely villous and often hirtellous, 



commonly glabrate in age; petioles much longer than the elliptic-lanceo- 

 late to elliptic-ovate blades; peduncles scapelike, slender, 7 to 15 cm. long. 



3. A. NANA. 



3. Plants with leafv stems; petioles mostly shorter to not much longer than the 

 blades (4). 



4. Stems viscid-villous, at least above, usually copiously so; bracts oval, 

 commonly narrowly so, acute or acuminate at apex; fruits thick-walled, 

 olive or brownish, mostly biturbinate (the lobes narrowed at apex), up 

 to 10 mm. long, considerably longer than wide 4. A. fbagbans. 



4. Stems viscid-puberulent or glabrate, sometimes also sparsely villous; bracts 

 broadly oval, suborbicular, or obovate, rounded and often apiculate at 

 apex; fruits thin-walled, straw-colored, mostly simply turbinate (the lobes 

 truncate at apex), seldom more than 6 mm. long, little if any longer 

 than wide 5. A. elliptica. 



1. Abronia villosa S. Wats., Amer. Nat. 7: 302. 1S73. 



Mohave, Maricopa, Pima, and Yuma Counties, 1,500 feet or lower, 

 March to April. Arizona, southern California, and Sonora. 



