540 LABIATAE 
egg-shaped or oval, on rather long leaf-stalks, the lower surface of the 
leaves and the flowers covered with a whitish down, Southern Penna,, and 
southward. June-Aug. 
25. MARRUBIUM, L. 
Perennial herbs, branching, more or less covered with whitish, woolly 
hairs, of bitter aromatic taste, with axillary clusters of flowers of white 
or purplish color. Calyx nearly equally 5- to 10-toothed, the teeth some- 
what spiny-pointed; corolla 2-lipped, the upper lip erect, lower spreading, 
3-lobed. Stamens 4, included in the tube of the corolla, the anterior 
(lower) pair longest. Style 2-cleft. 
M. vulgare, L. (Fig. 8, pl. 135.) Common Hoarnounp, Stem 1 to 
3 ft. high, woolly. Leaves opposite, round egg-shaped with coarse rounded 
teeth at the margins, on rather long leaf-stalks. Flowers axillary, in 
dense rounded clusters; corolla small, white. Common in waste places. 
26. MEEHANIA, Britton 
Low herb, spreading. Leaves on long leaf-stalks, opposite, heart-shaped 
at base. Calyx only slightly 2-lipped, 5-toothed, the teeth long and sharp, 
rather unequal, 15-nerved. Corolla rather large, swollen at throat, 2-lobed, 
the lower lobe 3-cleft. Stamens 4, two long and two short, included in the 
upper lip. Cells of the anthers parallel. 
M. cordata, (Nutt.) Britton. Mrenanta. A low plant, 3 to 8 in. 
high, with hairy runners. Leaves broadly egg-shaped or nearly orbicular, 
heart-shaped, on long leaf-stalks, rounded teeth at margin. Flowers blue, 
showy, in whorls of a few flowers each, the leaves at the whorls shorter 
than the calyx, the corolla hairy inside. Moist woods and thickets, south- 
west Penna., and southward and westward. May-July. 
+ Corolla 2-lipped; stamens 4, the posterior (upper) pair longest, shorter 
than or scarcely longer than the upper lip of the corolla 
27. NEPETA, L. 
Perennial herbs, with opposite, dentate leaves and with terminal and 
axillary clusters of purplish flowers. Calyx obliquely 5-toothed; corolla 
dilated at the throat, 2-lipped, upper lip erect, lower 3-lobed, the middle 
lobe much the largest. Stamens 4, ascending under the upper lip, the 
anterior pair shortest. 
N. Cataria, L. (Fig. 10, pl. 136.) Carminr. Catnip. Whole plant 
downy; stem branched, 1 to 3 ft. high. Leaves heart-shaped, on leaf- 
stalks, sharply tapering at apex, the upper bract-like, small, all with 
rounded coarse teeth at margins. Flowers mostly in terminal spikes, co- 
rolla whitish-purple. About dwellings. Common. July-Sept. 
28. GLECOMA, L. 
A prostrate herb, resembling Nepeta in many respects; the upper leaves 
not small and bract-like, and the apex of leaf is rounded. Flowers not 
numerous, in axillary loose clusters. 
G. hederacea, L. (Fig. 9, pl. 135.) GILL-ovER-THE-GROUND. (Nepeta 
