270 LABIATE. 



calyx bifid; the teeth ovate-oblong, acute, about as long as the corolla. 

 Bartsia pallida Pursk not of Linn. 



White Mountains, N. H, N. to Subarct. Amer. Aug. %. — Stem about 12 

 inches high. Floral leaves purple. Flowers yellow, pubescent, in a terminal 

 spike. I follow Bentham in referring the New Hampshire plant to this species, 

 although the description given by Lindley does not entirely vt^arrant such a 

 union. Yellow Painted Cup. 



22. MELAMPYRUM. Linn.—Covf Wheat. 



(From the Greek /icXaj, hlack, and nvpos, wheat ; the seeds resemble grains of 

 wheat, and are said, when mixed with flour, to make black bread. Hook. Br. Fl.) 



Calyx tubular, 4-cleft or 4-toothed. Corolla ringent or per- 

 sonate ; upper lip compressed, with the margins folded back ; 

 the lower lip a little longer, bi-convex, shortly 3-lobed. Sta- 

 mens 4. Capsule compressed, ovate, oblique or falcate, 2-celled. 

 Seeds usually 2 in each cell. 



M. Aviericanum Mich.: lower leaves lanceolate or linear-lanceolate; 

 floral ones lanceolate, toothed at the base ; flowers axillary, distinct. M. 

 lineare Lam. and M. latifolium Muhl. 



Woods. Can. to Car. June, July. (^.—Stem 8 — 12 inches high, branched 

 at the upper part. Flowers yellow. It varies considerably in the form of the 

 leaves. American Cow-wheat. 



Order XCIII. LABIATE.— Labiates. 



Calyx tubular, persistent, 2-lipped or regularly 5- or 10- 

 toothed. Corolla bilabiate ; the upper undivided or bifid, over- 

 lapping the lower, which is larger and 3-Jobed. Stamens 4, 

 didynamous, the 2 upper sometimes wanting. Ovary deeply 

 4-lobed ; style 1, proceeding from the base of the lobes ; stigma 

 bifid. Fruit 1 — 4 small nuts or achenia enclosed within the 

 persistent calyx. Seeds with little or no albumen. — Herbaceous 

 plants or under shrubs. Stem 4-cornered. Leaves opposite, 

 without stipules. Flowers usually in opposite nearly sessile 

 axillary cymes resembling whorls. 



I. Menthoide^. Corolla somewhat campanulate or funnel-form ; 

 the tube scarcely longer than the calyx ; the limb almost equally 4 — 5- 

 cleft. Stamens distant, straight or diverging, n£arly equal, or the upper 

 pair sometimes wanting. 



1. LYCOPUS. Linn.—WateT Horehound. 



(From the Greek Advoj, a wolf, and t«j, a foot ; on account of the fancied 

 resemblance in the cut leaves to a wolf's paw.) 



Calyx tubular, 5 -cleft, mouth naked. Corolla tubular-cam- 



