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LABIATE. (MINT FAMILY.) 
spiny-pointed. (L. EuropSeus, Pursh.) — Low grounds, common.— 
Smoothisb, l°-2° high, with larger flower-clusters than the last. 
4. ORIOANUUI, L. Wild Marjoram. 
Calyx ovate-tubular, hairy in the throat, striate, nearly equally 
5-toothed. Tube of the corolla about the length of the calyx? 
slightly 2 -lipped ; the upper lip rather erect and slightly notched, 
the lower of 3 nearly equal spreading lobes. Stamens 4 , exsert- 
ed, somewhat didynamous.—Herbs, with nearly entire leaves, 
and purplish flowers crowded in cylindrical or oblong spikes 
which are imbricated with colored bracts. (An ancient Greek 
name, said to be from opos , a mountain , and yavos, delight.) 
1. O. viilgare, L. Perennial, upright, hairy, corymbosely 
branched at the summit; leaves petioled, round-ovate; bracts ovate, 
obtuse, longer than the calyx, purplish. —Dry banks, sparingly natu¬ 
ralized in many parts of New England and southward. June — Oct. 
5. COLLINSONIA, L. Horse-Balm. 
Calyx ovate, declined in fruit, 2 -lipped; upper lip truncate, 3- 
toothed, the lower 2 -toothed. Corolla elongated, expanded at the 
throat, somewhat 2 -lipped, with the 4 upper lobes nearly equal 
but the lower larger and longer, pendent, toothed or lacerate- 
fringed. Stamens 2 (sometimes 4), much exserted, diverging : 
anther-cells divergent. — Strong-scented perennials, with large 
ovate leaves, and yellowish flowers on slender pedicels in loose 
and panicled terminal racemes. (Named in honor of Peter Collin - 
son , a well-known patron of science and correspondent of Linnaeus, 
and who introduced this plant into England.) 
1. C. Canadensis, L. Nearly smooth; leaves broadly ovate, 
serrate, pointed, petioled ; panicle loose, many-flowered ; stamens 2 . 
— Rich moist woods, common. July-Sept. — Plant l°- 3 °high: 
the pale yellow corolla long, exhaling the odor of lemons. 
6. HEDEOIflA, Pers. Mock Pennyroyal. 
Calyx ovoid or tubular, gibbous on the lower side near the base, 
2-lipped ; the upper lip 3-toothed, the lower 2-cleft. Corolla 2- 
lipped ; the upper lip erect, flat, notched at the apex ; the lower 
spreading, 3-cleft, the lobes nearly equal. Fertile stamens 2 ; 
the 2 upper mere sterile filaments or wanting. — Low odorous 
plants, with small leaves, and loose axillary clusters of flowers, 
27* 
