]3f) VERBENACEAE. 



ovary each with 2 ovules. Capsule contracted below into » long 1 stipe, 4- 

 seedi'd. 



D. americana L. Stem mostly simple, 1-3 feet high, peduncles axillary, 

 slender; bractlets linear-subulate. Wet places; May-August; Henry county. 



VERBENACEAEJ; St. Hit Vervain Family. 

 Herbs, with opposite exstipulste leaves, and perfect more or less irreg- 

 ular flowers. Calyx 4-5-lobed or 4-5-oleft. Corolla 2-lipped or regular. 

 Stamens 4, didynamous or only 2. Fruit dry or drupaceous, usually 

 splitting into as many 1-seeded nutlets as the ovary has cells. 



* Ovary 2-4-celled. 

 Verbena. Flowers spicate or in heads ; nutlets 4, l-scedod. 

 LiPPiA. Flowers spicate or in heads; nutlets 2 



* * Ovary 1-cellcd. 

 Phryma. Flowers in slender spikes; fruit an achene. 



VERBENA L. Vervain. Annuals or perennials, with sessile bracted flow- 

 ers arranged in solitary or panicled spikes. Calyx tubular, 5-toothed, one of 

 the teeth frequently shorter. Corolla tubular, limb somewhat unequally 5- 

 cleft. Stamens 4, included, upper pair sometimes abortive. Style slender; 

 stigma usually 2-lobed. 



* Perennial; spikes rather thick and densely flowered; bracts small. 



V. hastata L. Blue V. Stem 3-0 feet high, pubescent; leaves lanceolate 

 to oblong-lanceolate, gradually acuminate, coarsely serrate, petioled, the 

 lower often lobed or hastate; spikes linear, many flowered, erect, corymbed 

 or panicled; flowers blue, sometimes roseate. Waysides and waste places; 

 July-September; common. 



V. stticta Vent. Hoary V. Whole plant whitish-hirsute; stem 1-2 feet 

 high, simple or branched; leaves sessile, oval, obovate, or oblong, unequally 

 serrate; spikes dense; flowers blue, varying to whitish. Dry soil; July-Sep- 

 tember; common. 



V. angustifolia Mx. Stem 1-2 feet high, simple or branched, sparingly 

 hirsute; leaves linear or narrowly lanceolate, serrate, tapering to the base, 

 sessile; spikes few or solitary, slender; flowers purple or blue. Sandy soil; 

 June-July, frequent; Allamakee, Scott, Muscatine, Johnson, Henry, Cerro 

 Gordo, and Lyon counties. 



* * Perennial; spikes fill form ; bracts small. 



V. urticoefolia L. White V. Stem 3-5 feet high, hirsute to glabrate; 

 leaves ovate to oblong-lanceolate, thin, petioled, serrate; spikes terminal and 

 axillary, slender, loosely flowered; flowers small, white. Waste grounds, 

 fields and woods; July-August; common. 



* * * Annual; spikes thick, leafy-bracted. 



V. bracteosa Mx. Stem much branched from the base, diffuse or decum- 

 bent, hirsute; leaves ovate, oval, or obovate, base cuneate, usually tapering 

 to a short margined petiole, laciniately cut or 3-cleft; flowers small, blue or 

 purple, in short thick spikes. Pastures and waysides; June-September: fre- 

 quent. 



* * * * Perennlid; flowers nhoiry, spicate. 



V. canadensis (L.) Britton. Low, branching, ascending, hirsute to nearly 

 glabrous; stem 8-15 inches high; leaves ovate or ovate-oblong, iucisely 

 toothed, lobed. or 3-cleft; flowers showy, in pedunculate spikes, purplish or 

 blue. Cultivated, reported from Story county as an escape. (V. aublctia L. 

 of Gray's Manual.) 



