254 LAMIACEAE. 



serrate: calyx 4-4.5 mm. long; lobes lanceolate-subulate, nearly J as long as 

 the tube: corolla about 6 mm. long. — W. S. Frequent, in open woods and 

 dry thickets. — Schists. 



5. K. mutlca (Michx.) Britton. Stems 6-10 dm, tall, finely pubescent: leaf- 

 blades thick, ovate to lanceolate, 2-6 cm. long, serrate: calyx 3. .5-4 mm. long; 

 lobes deltoid to triangular-lanceolate, very short: corolla 6-8 mm. long; fila- 

 ments short. — Susquehanna valley. Occasional, in open woods and thickets. 

 — Schists. 



6. K. incana (L.) Kuntze. Stems 5-12 dm. tall, softly-pubescent and often 

 hirsute: leaf-blades ovate, elliptic, or lanceolate, 3-10 cm. long, remotely t-er- 

 rate: calyx 3. .5-4 mm. long; lobes narrowly triangular to triangular-lanceolate: 

 corolla 7-8 mm. long. — Common, in dry thickets and open woods. 



24. CUNIItA. L. Perennial erect herbs, or woody plants. Leaf -blades 

 broad, entire or toothed. Flowers in axillary cymes. Calyx nearly regular, 

 the lobes shorter than the tube. Corolla 2-lipped: upper lip erect: lower lip 

 3-lobed. Stamens 2^ long-exserted. 



1. C. origanoides (L.) Britton. Stem 2-4 dm. tall, wiry: leaf -blades ovate to 

 ovate-lanceolate, 1.5-2.5 cm. long, serrate : calyx 2-2.5 mm. long ; lobes ovate 

 to deltoid: corolla purplish, 4-5 mm. long. — N". S. Common, in woods and 

 thickets, and on open hillsides. — Sandstones and sJiales, schists. — Sum. — 

 Dittany. 



25. LYCOPUS [Tourn.] L. Perennial, erect or creeping, often stolon- 

 iferous herbs. Leaf-blades entire, toothed, or pinnatifid. Flowers in dense 

 axillary cymes. Calyx regular or nearly so: lobes longer than the tube or 

 shorter. Corolla slightly 2-lipped: upper lip notched: lower lip nearly equally 

 3-lobed. Stamens 2. — Sum. — Bugle-weed. Water-hoarhound. 



Corolla much longer than the calyx : blades of the lower leaves not pinnatlfld. 



Calyx-lobes much shorter than the tube, obtuse or merely acute : nutlets longer 

 than the calyx-lobes. 

 Style included : middle lobe of the lower lip of the corolla scarcely wider 



than the lateral ones. 1. L. virginicus. 



Style exserted : middle lobe of the lower lip of the 

 corolla much wider than the lateral ones. 

 Leaves with very short or obsolete petioles ; blades 



thick or firm. 2. L. unifloriis. 



Leaves with slender petioles ; blades thin. 3. L. membranaceus. 



Calyx-lobes as long as the tube or longer, acuminate : 



nutlets shorter than the calyx-lobes. 4. L. sessilifoUits. 



Corolla scarcely, if at all. longer than the calyx : blades of 



the lower leaves pinnatifid. 5. L. amcricanits. 



1. L. virginicus L. Stems 1-S dm. tall, purplish or greenish-purple, obtuse- 

 angled, not tuberous at the base, but with tuber-bearing stolons: leaf -blades 

 ovate to oblong-ovate or elliptic, 2-14 cm. long, coarsely toothed, manifestly 

 petioled: calyx about 2 mm. long; lobes narrow. — Common, in pastures and 

 rather moist soil. 



2. L. uniflorus Michx. Stems l-8i dm. tall, green or sometimes purplish, 

 sharp-angled, tuberous at the base, the stolons rarely tuber-bearing: leaf- 

 blades oblong to oblong-lanceolate, 2-8 cm. long, serrate, sessile or nearly so: 

 calyx about 1.5 mm. long; lobes wide. [L. communis Bicknell.] — S. Occa- 

 sional, in thickets along the Pequea Creek. — Schists. 



3. L. membranaceus Bicknell. Stems 2-9 dm. tall, mostly green, often blunt- 

 angled, tuberous at the base, the stolons wanting or sparingly developed : leaf- 

 blades lanceolate, oblong-lanceolate, or ovate-lanceolate, 4-11 cm. long, sharply 

 serrate, decidedly petioled: calyx 1.5-2 mm. long; lobes rather broad. — S. 

 Occasional, in moist thickets. — Schists. 



