FLOWERING PLANTS AND FERXS OF ARIZONA 763 



9. Leaves distinctly petioled, the lower petioles about 1 em. long, the 



blades extremely scabrous above, broadly ovate fat least the lower 

 ones), abruptly short-cuneate at base; stems short-pilose with 

 ascending, subappressed hairs 8. V. scabba. 



0. Leaves subsessile, or the petioles less than 1 cm. long, the blades not or 

 only slightly scabrous above, oblong-lanceolate, gradually euneate 



at base; stems hirsute with spreading hairs 9. V. Carolina. 



8. Corolla blue or violet, usually distinctly surpassing the calyx, 4 mm. long 

 or longer, the limb usually more than 3 mm. in diameter; fruits erect 

 or strong!}- ascending; spikes not filiform, not or scarcely flexuous (10). 



10. Spikes very dense even in fruit, forming a compact terminal panicle, 



occasionally solitary; corolla violet: leaf blades oblong-lanceolate, 

 much longer than wide, coarsely serrate (often double-serrate), not 

 cleft, or at most subhastately so at base: stems tall, stout, strictly 

 erect (11). 

 11. Leaf blades thick, coarsely and prominently rugose-reticulate 



beneath: stems copiously villous-hirsute with spreading hairs; 



fruiting spikes stout, 8 to 10 mm. in diameter. 



10. V. MACDOUGALII. 



11. Leaf blades relatively thin, not prominently reticulate beneath, 



often subhastately lobed at base; stems pilose with short, an- 

 trorse, subappressed hairs; fruiting spikes much less than 8 mm. 



indiameter 11. V. hastata. 



10. Spikes loose in fruit, not forming a compact terminal panicle; corolla 

 blue; leaf blades more or less cleft (12). 



12. Leaf blades seldom more than 1.5 times as long as wide, rather 



shallowly 3-cleft or merely incised-serrate, the veins whitish 

 beneath toward the margin: stems seldom more than 30 cm. 

 long; corolla dark blue, the limb less than 5 mm. in diameter. 



5. V. PLICATA. 



12. Leaf blades commonly more than 1.5 times as long as wide, pinna- 



tifld, or 3-parted and the (much longer) terminal division pinna- 



tifid, the veins not whitish beneath; stems commonly more than 



30 cm long; corolla light blue 12. Y. xeomexicaxa. 



1. Verbena gooddingii Briq., Ann. Conserv. et Jard. Bot. Geneve 10: 



103. 1907. 



Mohave County to Cochise. Santa Cruz, Pima, and Yuma Counties. 

 5,000 feet or (usually) lower, common on dry slopes and mesas, 

 flowering almost throughout the year. Southern Utah and Arizona 

 to southeastern California and northwestern Mexico. 



The typical form, with leaf blades several-cleft, is more frequent 

 in Arizona than var. nepetifolia Tidestrom (V. rem a A. Xels.) with 

 leaf blades not cleft, or cleft only near the base. The variety is 

 largely confined to the western half of the State and intergrades 

 freely with the typical form. The type of V. rema was collected 

 along Diamond Creek, Mohave County (N. C. Wilson 95). 



2. Verbena ciliata Benth., PL Hartw. 21. 1839. 



Verbena pubera Greene, Pittonia 5: 136. 1903. 

 Verbena ciliata var. pubera Pern", Mo. Bot. Gard. Ann. 20: 

 332. 1933. 



Apache, Xavajo, and Coconino Counties to Cochise and Pima 

 Counties, 4,000 to 7,000 feet, dry plains and mesas, April to July. 

 Western Texas to Arizona and Mexico. 



The writers believe that Greene's V. pubera corresponds more 

 closely with Bcntham's V. ciliata, at least as interpreted by A. Gray, 

 than do most of the specimens referred by Miss Perry to T. ciliata, 

 V. ciliata and the 2 following species seem to be completely confluent, 

 and it is almost impossible to identify many Arizona specimens with 

 assurance as belonging to one or the other species. 



