Verbena hastata L.
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Verbenaceae
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Scientific Name
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Description
Species Description - Perennial; stems 4–15 dm, branched above, rough-hairy, with short, spreading or antrorse hairs; lvs lanceolate to lance-oblong or lance-ovate, 4–18 cm, gradually acuminate, petiolate, coarsely serrate or incised, often hastately 3-lobed at base, glabrous or strigillose on both sides; spikes strict, usually many in a terminal panicle, short and compact, thicker than in no. 5 [Verbena urticifolia L.]; bracts lance-subulate, commonly a little shorter than the cal; cal 2.5–3 mm, hairy, with ± connivent, shortly subulate-tipped lobes; cor usually blue, the tube somewhat longer than the cal, hairy, the limb 2.5–4.5 mm wide; nutlets linear, 1.5–2 mm, faintly striate or smooth; 2n=14. Moist fields, meadows, prairies, and swamps; N.S. to B.C., s. to Fla. and Ariz. June– Oct. A hybrid with V. simplex is V. ×blanchardii Moldenke; one with V. stricta is V. ×rydbergii Moldenke.
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Common Names
common vervain