420 LABIATE. (mint FAMILY.) 



notched, the lower spreading, 3-cleft, its middle lobe broadest. Stamens 4, 

 included in the tube of the corolla. — Whitish-woolly bitter-aromatic perennials, 

 branched at the base, with rugose and crenate or cut leaves, and many-flowered 

 axillary whorls. (A name of Pliny, from the Hebrew marrob, a bitter juice.) 



M. vulgXke, L. (Commox Horehocnd.) Stems ascending; leaves 

 round-ovate, petioled, crenate-toothed ; whorls capitate ; calyx with 10 re- 

 cnrved teeth, the alternate ones shorter ; corolla small, white. — Escaped from 

 gardens into waste places. (Nat. from Eu.) 



30. BALLOT A, L. Fetid Horehound. 



Calyx nearly funnel-form ; the 10-ribbed tube expanded above into a spread- 

 ing regular border, with 5- 10 teeth. Anthers exserted beyond the tube of 

 the corolla, approximate in pairs. Otherwise much as in Marrubium. (The 

 Greek name, of uncertain origin.) 



B. NIGRA, L. (Black Horeiiouxd.) More or less hairy, but green, erect ; 

 the root pereimial ; leaves ovate, toothed ; whorls many-tiowered, dense ; calyx- 

 teeth 5, longer than the tube of the purplish corolla. — Waste places, X. Eng., 

 Penu., etc. ' (Xat. from Eu.) 



31. PHLOMIS, Tourn. Jerusalem Sage. 



Calyx tubular, .5 - 10-nerved, truncate or equally 5-toothed. Upper lip of the 

 corolla arched ; the lower spreading, 3-cleft. Stamens 4, ascending and ap- 

 proximate in pairs under the upper lip ; the filaments of the upper pair longer 

 than the others in P. tuberosa, with an awl-shaped appendage at base; anther- 

 cells divergent and confluent. — Leaves rugose. AVhorls dense and many-flow- 

 ered, axillary, remote, bracted. (An old Greek name of a woolly plant.) 



P. TUBEROSA, L. Tall perennial (3 -5° high), nearly smooth; leaves ovate- 

 heart-shaped, crenate, petioled, the floral oblong-lanceolate ; bracts awl-shaped, 

 hairy ; upper lip of the purple corolla densely bearded with white hairs on the 

 inside. — S. shore of Lake Ontario, N. Y. June, July. (Nat. from Eu.) 



32. LEON CJ BUS, L. Motherwort. 



Calyx top-shaped, 5-nerved, with 5 nearly equal teeth which are awl-shaped, 

 and when old rather spiny-pointed and spreading. Upper lip of the corolla ob- 

 long and entire, somewhat arched ; the lower spreading, 3-lobed, its middle lobe 

 larger, narrowly oblong-obovate, entire, the lateral ones oblong. Stamens 4, 

 ascending under the upper lip ; anthers approximate in pairs, the valves naked. 

 Nutlets truncate and sharply 3-angled. — Upright herbs, Avith cut-lobed leaves, 

 and close whorls of flowers m their axils ; in summer. (Name from k4wv, a lion, 

 and ovpa, tail, i. e. Lions-tail.) 



L. Cardiaca, L. (Common ^Motherwort.) Tall perennial ; leaves long- 

 petioled, the lower rounded, palmately lobed, the floral wedge-shaped at base, 

 3-cleft, the lobes lanceolate ; upper lip of the pale purple corolla bearded. — 

 Waste places, around dwellings. (Nat. from Eu.) 



L. Marrubiastrum, L. Tall biennial, with elongated branches; stem- 

 leaves oblong-ovate, coarsely toothed ; corolla (whitish) shorter than the calyx- 

 teeth, the tube naked within"; loAver lip rather erect. — Roadsides, N. J. to Del., 

 and southward. (Adv. from Eu.) 



L. SiBiRicus, L. Tall biennial; leaves 3-parted, the divisions 2-5-cleft, 

 or deeplv 3-7-cleft and incised; corolla (purplish) twice as long as the calyx, 

 the upper lip fornicate, the lower little spreading. — Waste grounds, Penu. ; 

 also far west. (Adv. from Eu. and Asia.) 



33. LAMIUM, L. Dead-Nettle. 



Calvx tubular-bell-shaped, about 5-nerved, with 5 nearly equal awl-pointed 

 teeth." Corolla dilated at tlie throat ; upper lip ovate or oblong, arched, uar- 



