FLOWERING PLANTS AND FERNS OF ARIZONA 803 



Key to the species 



1. Corolla 25 to 35 mm. long, pale yellow, conspicuously marked with numerous, 

 commonly linear, purple spots, the lower lip shallowly cleft (not nearly down 

 to the palate) ; stems up to 30 cm. long 1 . IvI. confertiflora. 



1. Corolla 15 to 20 mm. long, bright yellow, rather inconspicuously marked with 

 few, reddish-brown spots, the lower lip deeply cleft (nearly to the palate) ; 

 steins not more than 15 cm. long 2. M. breviflora. 



1. Mohavea confertiflora (Benth.) Heller, Muhlenbergia 8: 48. 1912. 



Antirrhinum conrfertiflorum Benth. in DC, Prodr. 10: 592. 

 1846. 

 Mohave and Yuma Counties, 2,000 feet or lower, locally abundant 

 in sand and on stony talus-slopes, February to April. Nevada, 

 western Arizona, southeastern California, and Baja California. 



2. Mohavea breviflora Coville, Contrib. U. S. Natl. Herbarium 4: 168. 



1893. 

 Northern Mohave County, near Beaver Dam (Kearney and Peebles 

 13225), and 20 miles south of Boulder Dam (Kearney and Peebles 

 11230), 1,800 feet or lower, dry sandy or stony slopes, April. Nevada, 

 northwestern Arizona, and southeastern California. 



4. ANTIRRHINUM. 40 Snapdragon 



Plants annual or biennial; stems erect or twining; leaves (at least 

 the upper ones) alternate, the blades entire; flowers axillary, solitary 

 or in leafy terminal racemes; corolla strongly bilabiate, with a promi- 

 nent palate in the throat. 



The popular garden snapdragon (A. majus L.) is a native of southern 

 Europe. 



Key to the species 



. Stems climbing by the filiform, tendrillike peduncles, these commonly at least 

 3 cm. long; herbage villous or lanate at base of the stem, otherwise glabrous 

 blades of the lower leaves oblong-ovate, of the upper ones narrowly lanceo- 

 late or linear; corolla bright yellow, conspicuously saccate at base; seeds very 



irregularly corky-tuberculate and winged 1. A. fili pes. 



1. Stems not climbing, commonly erect; corolla not yellow (2). 



2. Herbage not viscid-pilose, glandular-puberulent in the inflorescence and 

 sparsely lanate at base of the stem; leaf blades lanceolate or linear; 

 corolla white with purple veins; capsule oblique; seeds somewhat winged. 



2. A. KINGII. 

 2. Herbage copiously viscid-pilose throughout; leaf blades ovate (3). 



3. Flowers subsessile or on pedicels shorter than the calyx; corolla rose 

 purple and white (drying violet); capsule nearly globose, not oblique, 

 somewhat didymous, rounded or depressed at apex; seeds 1 mm. or 

 more in greatest diameter, with an elliptic or orbicular, deeply cup- 

 shaped wing much larger than the body 3. A. cyathiferum. 



3. Flowers mostly on pedicels as long or longer than the calyx; corolla violet; 

 capsule oblong-lanceolate or narrowly ovate in outline, very oblique, 

 not at all didymous, attenuate at apex; seeds minute, much less than 

 1 mm. in greatest diameter, sharply ribbed and niuricate; flowers 

 variable in size 4. A. nuttalliamm. 



1. Antirrhinum filipes A. Gray in Ives, Colo. Riv. Rpt. 19. I860. 



Pinal, Maricopa, Mohave, and Yuma Counties, 2,500 feet or lower, 

 sandy plains and slopes, February and March, type from above Fort 

 Mohave, Mohave County (Newberry in 1858). Southern Utah and 

 western Arizona to southeastern California. 



4 " Reference- Munz, Philip A. the antirrhinoideak-antirrhineae of tiik new world. Calif 

 Acad. Sei. Proc. ser. 4. 15: 325-397. 1926. 



