280 LABIAT.E. 



smoothish ; teeth of the calyx ovate, somewhat obtuse. Hyssopus Tiepetoidea 

 Linn. 



Woods. Can. to Virg. W. to Miss. July, Aug. %.—Stem 3—6 feet high, 

 branched, yellowish-green. Leaves pale-green, slightly pubescent beneath. 

 Flowers small, greenish-yellow, in terminal cylindric spikes which are inter- 

 rupted at base. Yelloro Giant Hyssop. 



2. L. scrophidariafolius Benth. : stem pubescent, with the angles obtuse ; 

 leaves ovate, acute, serrate-crenate, green on both sides, smooth above, 

 pubescent beneath ; teeth of the calyx lanceolate, acute. Hyssopus scro- 

 phulariafolius Linn. 



Woods. N. Y. to Virg. W. to 111. July, Aug. %.—Slem 3—5 feet high, 

 mostly of a purple color, branched. Leaves often cordate at base, on pubescent 

 petioles. Flowers pale-purple, in terminal cylindric spikes which are inter- 

 rupted at base. Purple Giant Hyssop. 



18. NEPETA. iwm.— Cat Mint. 



(Named, some say, from Nepi, a town in Italy, others, from Nepa, a scorpion, 

 for whose bite this plant was considered a cure. Hook. Brit. Fl.) 



Calyx tubular, 13 — 15-nerved, obliquely 5-toothed. Corolla 

 2 -lipped ; upper lip erect, emarginate or bifid ; lower 3-lobed, 

 middle lobe largest ; throat dilated ; tube slender below. Sta- 

 mens 4, ascending. 



1. N. Cataria Linn. : hoary-pubescent ; stem erect, tall ; leaves oblong- 

 cordate, petiolate, acute, coarsely crenate, rugose ; whorls many-flowered, 

 upper ones crowded in a spike ; calyx half as long as the corolla. 



Old fields and cultivated grounds. N. S. June— Aug. %.— Stems 2 — 4 feet 

 high, often several from the same root, downy and whitish. Leaves softly pu- 

 bescent and green above, canescent beneath. Flowers yellowish- white, tinged 

 and spotted with red. Introduced from Europe. 



Common Cat-mint. Catnep. 



2. N. Glechoma Benth. : stem procumbent, rooting at the base ; leaves 

 petiolate, cordate-reniforra, rounded, creriate, somewhat hairy ; whorls few- 

 flowered, axillary; corolla three times as long as the calyx. Glechoma 

 hederacea Linn. 



Road sides, &e. N. S. May, June. 11-. — Stems about a foot long, slender, 

 with ascending branches. Flowers large, blue, in distant axillary whorls. In- 

 troduced from Europe. Ground Ivy. 



19. DRACOCEPHALUM. /.m?i.— Dragon's Head. 



(From the Greek SpaKov a dragon, and Kc^aXrj, a head ; in allusion to the form 

 of the flowers.) 



Calyx tubular, 13 — 15-nerved, 5-tootbed ; upper tooth broader 

 and often larger, the 3 upper sometimes approximated. Corolla 

 S -lipped ; upper lip erect and emarginate ; lower spreading, 

 3-lobed. Stamens 4, ascending ; the lower pair shorter. 



D. parviflorum Nutt: stem erect, branched; leaves ovate-lanceolat«, 

 coarsely or incisely crenate or serrate, petiolate, green on both sides ; whorls 

 in a terminal capitate spike ; upper tooth of the calyx broad-ovate ; corolla 

 scarely longer than the calyx. 



