272 I^ABIATAE 



27. CUNILA L. 

 1. Cunila origanoides (L.) Britton. American Dittany. (Man. 

 p. 803; I. P'.y. j/d/.) In dry woods and thickets, N. Y. to Fla., Ohio 

 and Ga. — Pennsylvania : Bradvob-ti ; Monro's ; Northampton; Lu- 

 zERNB ; Bucks ; Delaware ; Chester ; Lancaster ; Frankijn ; 

 Ali,egheny. 



28. LYCOPUS L. 



Calyx-lobes ovate, shorter than the nutlets. 



Stem not tuberous at the base : leaf-blades mainly ovate, i. L. Virginicus. 



Stem tuberous at the base : leaf-blades mainly oblongf. 2. L. communis. 

 Calyx-lobes subulate or lanceolate. 



Corolla twice as long- as the calyx : bracts minute. ' 3. L. sessili/oHus. 



Corolla not twice as long as the calyx : bracts subulate. 4. L. Americanus. 



1. LycopuB Virginicus I,. Purple Bugi,e-weed. (Man. p. 803.) 

 In moist soil, N. Y. to Ala., Neb. and Kans. — Pennsylvania : Lacka- 

 wanna ; Monroe ; Luzerne ; Northampton ; Bucks ; Montgom- 

 ery ; Delaware ; Chester ; Lancaster ; Lebanon ; Huntingdon ; 

 Erie ; Allegheny. ' 



2. Lycopus communis Bicknell. Common BuglE-weed. (Man. p. 

 803.) In moist soil, Newf. to B. C, Va., Neb. and Ore. — Pennsylvania : 

 Northampton ; Lancaster. 



3. Lycopus seBsUifoUus A. Gray. Sessile-LEaved Water Hoar- 

 hound. (Man. p. 804 ; I. F./. j/fip.) In wet soil, eastern Mass. to Fla. 

 — Pennsylvania : Lancaster. 



3. Lycopus Americanus Muhl. CuT-lEaved Water Hoarhound. 



(Man. p. 804; I. F./ jz/y.) In wet soil, Newf. to B. C, Fla., Tex., 



Utah and Calif. — Pennsylvania : LuzERNE ; Columbia ; Norhtampton ; 



Bucks ; Delaware ; Chester ; Lancaster ; Franklin ; Hunting- 



.don; Allegheny. 



29. MENTHA L. 



Flower-clusters, at least most of them, in terminal spike-like panicles. 

 Plants glabrous or .essentially so. 

 Panicles slim, mostly less than 10 mm. thick : leaf-blades sessile or nearly 



so. I. M. spicata. 



Panicles stout, mostly over 10 mm. thick : leaf -blades petioled. 



2. M. piperita. 

 Plants pubescent, at least about the nodes of the stem. 



Panicles relatively thin, mostly less than 11 mm. thick. 

 Leaf -blades of a lanceolate or oblong-lanceolate type, mostly acute. 



3. M. longifoUa. 

 Leaf-blades of an elliptic or ovate-oblong type, mostly obtuse. 



4. M. rotundifolia. 

 Panicles relatively stout, mostly over 1 1 mm. thick. 



Leaf-blades sessile i panicles, at least the terminal one elongated. 



5. M. alopecuroides. 

 Leaf-blades, or those below the inflorescence, petioled : panicles short. 



Leaf-blades merely serrate. 6. M. aquatica. 



Leaf-blades incised and crisped. 7. M. crispa. 



Flower-clusters axillary, not in terminal spike-like racemes. 



