DICOTYLEDONOUS PLANTS 195 



tube whitish, lips blue, the lower one rather shorter. Open wood- 

 lands and dry soil. 



3. S. integrifolia, L. Large-flowerkd Skullcap. Stem cov- 

 ered with fine, grayish down, usually unbranched, 1-2 ft. high. 

 Leaves lance-oblong or nearly linear, mostly entire, ol3tuse, with very 

 short petioles. Corolla 1 in. long, tube pale, lips large and spread- 

 ing, blue. Dry ground. 



II. MARRUBIUM, Toum. 



Perennial, downy, or woolly herbs. Whorls of flowers axil- 

 lary ; flowers small;' bracts leaf -like. Calyx tubular, 5-10- 

 toothed, teeth somewhat spiny. Corolla short ; upper lip 

 erect, lower spreading, 3-cleft, the middle lobe broadest. 

 Stamens 4, not projecting. Lobes of the stigma short and 

 blunt. 



1. M. vulgare, L. Horehouxd. Stems somewhat reclining, 

 stout, branching, leafy, 1-1^ ft. high. Leaves broadly ovate, heart- 

 shaped or wedge-shaped at the base, scalloped, leathery and wrinkled. 

 Whorls of flowers dense. Calyx-teeth hooked at the tip. Corolla ^ 

 in. long, white. Cultivated from Europe as an herb (used in prepa- 

 ration of horehound candy) and somewhat naturalized. 



III. NEPETA, L. 



Erect or prostrate herbs. Whorls of flowers axillary or ter- 

 minal; flowers blue or white. Calyx tubular, 15-ribbed, 

 5-toothed. Corolla-tube slender below, dilated at the throat, 

 naked ; upper lip notched or 2-cleft ; lower lip 3-cleft, middle 

 lobe large. Stamens 4, ascending under the upper lip, the 

 upper pair longer. Lobes of the stigma awl-shaped. 



1. N. Cataria, L. Catnip. Stem grayish, downy, 2-3 ft. high, 

 branched, very leafy. Leaves large, ovate-heart-shaped, deeply scal- 

 loped, serrate, white and downy beneath. Corolla about ^ in. long, 

 whitish with purple dots. Introduced from Europe ; a common 

 weed about dooryards. 



2. N. Glechoma, Benth. Ground Ivy, Gill-over-the-ground, 

 Creeping Charley, Crow-victuals, Robin-runaway. Creep- 

 ing. Leaves roundish, kidney-shaped, and crenate. Corolla bluish- 

 purple, three times as long as the cal}^. Introduced from Europe, 

 common in damp places about houses and gardens. 



