ORDER XCI. LABIATE. 467 



Corolla double the length of the calyx, bilabiate ; the upper lip 

 2-lobed, the lower 3-parted. Stamens 4, distant, exserted. 

 Anthers awned. 



1. C. linearifo'lia, (Ell.) Stem erect, glabrous, branching. Leaves 

 linear, dotted, sometimes clustered. Flowers in terminal racemes. Ca- 

 lyx striate, usually tinged with purple, minutely pubescent at the sum- 

 mit, dotted. Corolla with throat inflated. Style longer than the sta- 

 mens, hispid. — Reddish, spotted with violet. 0. Sept. — Oct. Near 

 Culloden, Geo. 12 — 18 inches. 



Genus X.— HEDEO'MA. Pers. 13—1. 

 (A Greek name for mint.) 



Calyx bilabiate ; the upper lip with 2 subulate, ciliate seg- 

 ments ; the lower lip 3-cleft, segments lanceolate. Corolla 

 ringent. Stamens 2. 



1. H. pulegioi'des, (L.) Stem pubescent, angular. Leaves lanceo- 

 late, serrate, pubescent. Floicers on axillary peduncles, verticillate. 

 Calyx hairy. — Pale purple. 0. July — Aug. Sandy soils. 6 — 10 in. 



Squaw Mint Wild Pennyroyal. 



This plant is an aromatic stimulant, and like many of the plants of this order is used 

 much in family practice. It is taken in hot infusion for producing perspiration. 



Genus XL— HYS'SOPUS. L. 13—1. (Lophanthus.) 

 (Origin of the name uncertain.) 



Lower lip of the corolla 3-parted, middle lobe sub-crenate. 

 Stamens straight, distant, long. Style longer than the corolla. 



1. H. scrophulari,efo'liu9, (Willd.) Stem herbaceous, pubescent 

 toward the summit, glabrous below. Leaves cordate, and ovate-lanceo- 

 late, acuminate, petioles pubescent. Flowers in crowded whorls, form- 

 ing spikes. Bracts ovate, acuminate. — Reddish. 1(. July — Septem- 

 ber. Mountains. 2 — 3 feet. 



Genus XII.— COLLINSO'NLA. L. 2—1. 

 (In honor of Peter Collinson, a Mend of Linnaeus.) 



Calyx bilabiate ; upper lip 3-toothed, lower one bifid, 10- 

 nerved. Corolla unequal, lower lip with numerous capillary 

 6egments. Stamens 2 — 4. Seed generally abortive except 1. 



1. C. Canadensis, (L.) Stem 4-angled, smooth. Leaves broad -cor- 

 date, ovate, glabrous, teeth of the calyx subulate. Flowers large, in a 

 compound terminal panicle. 



Horse-balm. Heal-all. Stone-root. Knot-root. 



2. C. tubero'sa, (Mich.) Stem somewhat pubescent, branching. 

 Leaves large, rhomboid-oval, glabrous, serrate, on long petioles, except 

 the upper ones. — Yellow. If.. Aug. — Sept. Rich soils. 3 — 4 feet. 



3. C. scab'ra, (L.) Stem furrowed, pubescent toward the summit, 

 glabrous at the base. Leaves rugose, pubescent, ovate, slightly cordate, 

 obtuse, on short petioles. Flowers in terminal racemes. Calyx pubes- 



