

V erbenaceae 331 
VERBENACEAE Vervain Family 
Ours perennial herbs. Leaves alternate or opposite (ours) or whorled. Flowers 
perfect, irregular to regular, in terminal or axillary spikes (ours) or racemes or cymes 
or panicles. Calyx usually persistent, usually 4—5-lobed or -cleft. Corolla sympetalous, 
regular or 2-lipped; limb 4—5(ours)-cleft. Stamens 2—5, didynamous unless only 
2, on the corolla, alternate with the corolla-lobes. Ovary superior, 2—4 (ours) -celled, 
rarely 8—10-celled; carpels 2; ovules 4; style 1, terminal; stigmas 1—2. Fruit in 
ours dry, separating into 4 nutlets. 
VERBENA VERVAIN 
Stems 4-angled. Leaves pinnately veined, serrate to lobed or pinnatifid. Flowers 
bracted, in ours blue or purple or pink. Calyx 5-angled, somewhat unequally 5-toothed. 
Corolla salverform or funnelform; limb slightly 2-lipped or regular. Stamens 2 or 4, 
mcluded. Style 2-lobed. Fruit mostly enclosed by the calyx; nutlets linear or linear- 
oblong, crustaceous, smooth or papillose or rugose. (Said to be from Celtic farfaen—to 
remove stone. Why?) 
A. Bracts shorter than the calyx. 
B. Corolla 8—10 mm. long; plant erect. E. 
V. stricta Vent. (Hoary Vervain) 
BB. Corolla about 4 mm. long. 
Ceo» Plant erect... E. V. hastata L. (Blue Vervain) 
CC. Plant spreading or ascending. U. 
V. prostrata Benth. 
AA.  Bracts longer than the calyx; plant prostrate or decumbent; corolla about 4 mm. 
long. E. V. bracteosa Michx. 
MENTHACEAE (Labiatae) Mint Family 
Herbs or shrubs or trees (not ours), erect to vine-like, stems mosily 4-angled. 
Leaves simple, opposite, mostly punctate; stipules none. Flowers mostly irregular, per- 
fect, variously clustered but mosily in axillary whorls, usually bracted. Calyx persistent, 
regular to 2-lipped, 4—5-lobed, mostly veined. Corolla-limb 4—5-lobed, mostly 2- 
lipped; upper lip entire to 2-lobed; lower lip usually 3-lobed. Stamens on the corolla- 
tube, alternate with the petal-lobes, usually 4; 2 usually shorter or antherless or rudi- 
mentary or wanting. Ovary 4-lobed or -parted, superior; ovules 4; style 1, from the 
center of the ovary, 2-lobed at the top. Fruit of 4 nutlets. 
A. Herbs. 
B. Plants erect or merely spreading, not vine-like. 
C. Corolla distinctly irregular, distinctly 2-lipped in most. 
D. Stem villous or densely tomentose. 
E. Leaves acute; flowers in terminal spikes on stem and branches; stamens 
projecting beyond the corolla-tube. 
F. Leaves mostly rounded at base; calyx 10-veined; corolla not dark- 
dotted; ovary 4-lobed. TEUCRIUM (p. 333) 
FF. Leaves mostly cordate at base; calyx 15-veined; corolla dark-dotted; 
ovary 4-parted. NEPETA (p. 334) 
EE. Leaves obtuse; flowers in dense axillary clusters; calyx 5—10-veined; 
corolla not dotted; stamens included in the corolla-tube. 
MARRUBIUM (p. 334) 
