VERBENACEAE 1 009 



glandular-pubescent, becoming 3 mm. long : corolla light blue ; tube surpassing the calyx ; 

 limb 3.5 mm. long : nutlets oblong, 2-2.5 mm. long. 



On river banks, New Jersey to Virginia and North Carolina. Summer. 



3. Verbena Halei Small. Annual, slender. Stems 2-9 dm. tall, glabrous, or 

 strigillose above, branching near the top or rarely at the base : leaves 3-10 cm. long ; blades 

 various, those of the basal and lower stem-leaves oblong to ovate, irregularly toothed and 

 incised, long-petioled, those on middle part of stem commonly broader, 1-2-pinnatifid, 

 those of the upper leaves sparingly toothed or entire : spikes slender : calyx becoming 3-3.5 

 mm. long, strigillose : corolla blue ; tube about 3 mm. long ; limb 6-7 mm. broad : nutlets 

 linear-oblong, about 2.5 mm. long. 



In sandy soil, Indian Territory to Louisiana and Texas. Spring and summer. 



4. Verbena xutha Lehm. Perennial, or perhaps annual, pubescent. Stems 6-10 dm. 

 tall, simple or sparingly branched : leaf-blades incised-pinnatifid, or 3-parted on the lower 

 part of stem, strigose to canescent, the segments coarsely toothed to laciniate : spikes rather 

 slender, strict : calyx becoming 4 mm. long, strigose ; lobes acuminate, pubescent : corolla 

 blue to purple ; tube shorter than the calyx ; limb 3.5-4 mm. broad : nutlets narrowly 

 oblong, about 2 mm. long. 



In open grounds, Louisiana, Texas and California to Mexico. Spring to fall. 



5. Verbena urticaefolia L. Annual or perennial, sparingly pubescent with spread- 

 ing hairs, or glabrous. Stems 4-15 dm. tall, often much branched : leaf-blades broadly 

 lanceolate or ovate-lanceolate, or sometimes ovate or oval, 8-20 cm. long, coarsely and 

 doubly crenate-serrate, the rounded or subcordate base decurrent on the petiole : spikes 

 slender, interrupted : calyx 2 mm. long ; lobes slightly longer than the fruit, but the tips 

 not meeting over its top : corolla white, 4 mm. long ; tube cylindric, curved, pubescent in 

 the throat : nutlets oblong, 2.2 mm. long, smooth. 



In waste places or on roadsides, New Brunswick to Minnesota, Florida and Texas. Summer. 



6. Verbena polystachya H.B.K. Similar to V. urticaefolia in habit. Leaf-blades 

 relatively smaller and thicker, commonly less gradually acute or acuminate, coarsely rough- 

 pubescent : spikes usually copiously and rather closely flowered : calyx-lobes acuminate or 

 slenderly acute, much longer that the fruit over whose top they converge and meet. 



In dry or sandy soil, Florida, through the Gulf States to California. Also in tropical America 

 Spring to fall. 



7. Verbena Carolinensis (Walt.) J. F. Grnel. Perennial, scabro-pubescent. Stems 

 2-8 dm. tall, simple, or sparingly branched above : leaf-blades spatulate to oblong or oblong- 

 hastate above, 2-10 cm. long, more or less doubly serrate, prominently nerved beneath : 

 spikes slender, becoming interrupted : bracts lanceolate, shorter than the calyxes : calyx 

 becoming about 4 mm. long, minutely glandular-pubescent ; lobes acute : corolla pink or 

 bluish, pilose without ; tube surpassing the calyx : limb 5-6 mm. broad : nutlets 3 mm. 

 Jong, glabrous. 



In sandy soil or sand, Virginia to Florida and Alabama. Spring. 



8. Verbena stricta Vent. Perennial, densely pubescent with pale hairs. Stems 

 rather stout, 2-12 dm. tall, simple or branching above : leaf-blades oblong, oval or sub- 

 orbicular, 3-10 cm. long, sharply doubly serrate or incased, rugose, sessile or nearly so : 

 spikes stout : bracts lanceolate, as long as the calyxes : calyx hirsute, becoming 5 mm. 

 long ; lobes acuminate : corolla deep blue ; tube slightly surpassing calyx, pubescent; limb 

 8-9 mm. broad : nutlets linear, 3.5 mm. long, glabrous, strongly reticulated. 



In dry soil, Minnesota to Pennsylvania, Texas and New Mexico. Naturalized eastward. Summer 

 and fall. 



9. Verbena hastata L. Perennial, rough-pubescent with short"* ascending hairs. 

 Stems 4-15 dm. tall, often branched above ; leaf-blades lanceolate, ovate-lanceolate or some- 

 times oblong-lanceolate, 4-12 cm. long, acute or acuminate, sharply and doubly serrate, often 

 incised and hastate at the base : spikes erect, narrow, 2-15 cm. long, continuous : calyx 2.5 

 mm. long, pubescent ; lobes triangular-ovate, acute : corolla purplish blue, 4-4.5 mm. 

 broad ; tube pubescent without : nutlets linear, fully 1.5 mm. long, smooth. 



In waste places and thickets, Nova Scotia to British Columbia, Florida and New Mexico. Summer. 



10. Verbena angustifolia Michx. Perennial, puberulent or sparsely pubescent. 

 Stems commonly branched, 1-5 dm. tall, the branches mostly erect : leaf-blades linear, 

 linear-oblong or linear-spatulate at the base of the stem, 2-10 cm. long, distantly or 

 coarsely serrate, rugose : spikes strict, commonly continuous : calyx nearly glabrous, be- 

 coming 4 mm. long ; lobes acuminate : corolla blue, pubescent without ; tube much sur- 

 passing the calyx, sparingly pubescent ; limb 5-6 mm. broad : nutlets linear, 3 mm. long, 

 glabrous, prominently reticulated. 



In dry soil, Massachusetts to Wisconsin, Florida. Mississippi and Missouri. Summer. 

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