Genus i. 



VERVAIN FAMILY. 



97 



7. Verbena canadensis (L.) Britton. 

 Large-flowered Verbena. Fig. 3558. 



Buchnera canadensis L. Mant. 88. 1767. 



V. Aubletia Jacq. Hort. V. 2: 82. pi. 176. 1772. 



Glandularia carolinensis J. G. Gmel. Syst. 2: 920. 



1796. 

 Verbena canadensis Britton, Mem. Torr. Club 



5 : 276. 1894. 



Perennial, pubescent or glabrate ; stem slen- 

 der, usually branched, 8-20' high, the branches 

 ascending. Leaves membranous, ovate in out- 

 line, petioled, 1-3' long, truncate or broadly 

 cuneate at the base, irregularly toothed, or 

 pinnately incised, often 3-cleft, the lobes den- 

 tate; spikes peduncled, solitary at the ends 

 of the branches, dense, short and capitate 

 when in early flower, becoming 2-4' long in 

 fruit ; bracts linear-subulate, mostly shorter 

 than the calyx; calyx-teeth filiform-subulate; 

 corolla io"-i2" long, blue, purple, white or 

 in cultivation variegated, its limb 7"-l2" 

 broad, the lobes oblong or obovate, emargi- 

 nate or obcordate ; fruit 2i"-3" high. 



In dry soil, Illinois to Tennessee, Virginia and 

 Florida, west to Kansas and Texas. This and 

 the next the source of many garden and other 

 hybrids. Cut-leaved races have been referred 

 to V. Dntwmondii (I.indl.) Baxter. May-Aug. 



8. Verbena bipinnatifida Nutt. Small- 

 flowered Verbena. Fig. 3559. 



Verbena bipinnatifida Nutt. Journ. Acad. Phila. 



2: 123. 1821. 

 Glandularia bipinnatifida Nutt. Trans. Am. Phil. 



Soc. (II.) 5: 184- 1833-37- _ _ 



Verbena ambrosiaefolia Rydb. ; Small, Fl. SE. 



U. S. 1011. 1903. 



Perennial, producing suckers, hirsute or 

 hispid ; stems rather stout, mostly branched, 

 erect, 6'-i8' high. Leaves firm, petioled or 

 the uppermost sessile, broadly ovate in out- 

 line, deeply 1-2-pinnatifid into linear or linear- 

 oblong, obtuse or subacute lobes and seg- 

 ments; spikes peduncled or sessile, solitary 

 at the ends of the branches, thick, dense, at 

 first short and capitate, becoming 2-4' long 

 in fruit; bracts linear-subulate, about as long 

 as or somewhat exceeding the calyx ; calyx- 

 teeth filiform-subulate; corolla 6"-g" long, 

 purple or lilac, the limb 4"-7" broad, the lobes 

 emarginate or obcordate; fruit 1V-2" long. 



On dry plains and prairies, South Dakota to 

 Missouri, Texas and Chihuahua, west to Colo- 

 rado and Arizona. May-Sept. 



2. LIPPIA Houst.; L. Sp. PI. 633. 1753. 



Perennial herbs, or shrubs, with opposite, sometimes verticillate, or rarely alternate leaves, 

 and small bracted flowers, in axillary or terminal, mostly peduncled spikes or heads. Calyx 

 small, membranous, ovoid, campanulate or compressed and 2-winged, 2-4-toothed or 2-4-cleft. 

 Corolla-tube straight or incurved, cylindric, the limb oblique, spreading, somewhat 2-lipped, 

 4-cleft, the lobes broad, often retuse or eroded. Stamens 4, didynamous, included or exserted; 

 anthers ovate, not appendaged, the sacs nearly parallel. Ovary 2-celled ; ovules I in each 

 cavity; style short; stigma oblique or recurved. Fruit dry, with a membranous exocarp, at 

 length separating into 4 nutlets. [In honor of Auguste Lippi, 1678-1703, French naturalist.] 

 About no species, most abundant in tropical and subtropical America, a few African. Besides 

 the following, which by some authors are separated as a distinct genus (Phyla Lour.), about 6 

 others occur in the southern United States. Type species: Lippia americana L. 

 Leaves linear-cuneate to spatulate, 2-8-toothed ; peduncles little exceeding leaves. 

 Leaves sharply serrate ; peduncles much longer than leaves. 



Leaves oblong or lanceolate, mostly acute. 



Leaves spatulate or obovate, mostly obtuse. 



1. L. cuneifolia. 



2. L. lanceolata. 



3. L. nodiflora. 



