Mentha. LABIATyE. 57 



usually almost simple, but sometimes branching, rather stout. Leaves 2-3 inches long and 

 three-fourths of an nich wide, hairy, particularly underneath. Flowers in dense axillary 

 whorls ; the peduncles of the cymules 2-3 lines long. Calyx hairy. Corolla pale purple. 

 Stamens nearly twice a? long as the corolla. 



Low grounds along rivulets ; rather common. July - September. This is probably the 

 only species of Mint native of North America. • , 



3. LYCOPUS. Linn ; Benth. Lab. p. 184 ; Endl. gen. 3595. WATER BOREHOUNO. 



[ From the Greek, lykos, a wolf, and jmiis, a foot ; from a supposed resemblance of its leaves to the foot of tliat animal.] 



Calyx tubular-campanulate, 4 - 5-toothed, naked in llie throat. Corolla tubular-campanulate, 

 about as long as the calyx ; the limb almost equally 4-lobed. Stamens 2, distant .(some- 

 times with the upper pair rudimentary). Achenia 4, smooth, obliquely truncate at the apex. 

 — Herbs, mostly growing in wet places, with acutely toothed or pinnatifid leaves, and small 

 flowers in dense axillary whorls. 



1. Lycopus sinuatus. Ell. Common Water Horehound. 



Stem erect, acutely 4-angled ; leaves oblong-lanceolate, petiolate, sinuately toothed , the 

 lower ones more or less pinnatifidly incised ; whorls many-flowered ; calyx 5-toothed , the 

 teeth acuminated with a short spine, much longer than the achenia. — Ell. sk. 1. p. 187 ; 

 Benth. Lab. p. 187 ; Darlingt. fi. Cest. p. 341 ; Hook. Jl. Bor.-Am. 2. p. 111. L. Euro- 

 pasus, Mickx. Jl. 1. p. lA; Pursh, Jl. 1. p. 16 ; Bigel. Jl. Bost. p. 9 ; Beck, bat. p. 271. 

 L. Europasus, var. angustifolius, Torr. Jl. I. p. 21. L. Americanus, Muhl. cat. p. 3; Bart. 

 Jl. Pliilad. I. p. \2. L. exaltatus, Pursh, I. c. p. 727 ; Ell. sk. 1. p. 26, not of Linn. 



Perennial. Stem 1-2 feet high, much branched ; the sides concave. Leaves 2 - 3 inches 

 long, narrowed at the base, acute, nearly smooth, sprinkled with minute glandular dots ; the 

 teeth coarse and acute ; the lower ones often finely pinnatifid. Whorls densely flowered. 

 Calyx smoothish ; the teeth 3-nerved, tapering into a spine-like or subulate point. Corolla 

 white or sometimes with a tinge of red, pubescent inside. Stamens shorter than the corolla. 

 Style 2-cleft ; the lobes very unequal , the longer one flattened and somewhat dilated. 



JjOW wet grounds ; common. July - August. Mr. Bentham notices a pair of capitate 

 rudimentary sterile stamens in this species, but I did not find them in the specimens that I 

 examined. 



2. Lycopus Virginicus, Linn. Bt/gle-weed. 



Stem stoloniferous at the base ; leaves oblong- or ovate-lanceolate, serrate-toothed, narrowed 

 at each end ; calyx mostly 4-toothed , the teeth ovate, spineless. — Linn. sp. 1. p. 21 ; Walt. 

 Jl. Car. p. 64 ; Michx. Jl. 1. p. 14 ; Pursh, Jl. 1. p. 16 ; Ell. sk. 1. p. 25 ; Bigel. Jl. Bost. 

 [Flora — Vol. 2.] 8 



