LABIATE. 273 



HAS. Low fields. N. Y- to Car. July Sept. m 1$. Stem 2 3 

 feet high, whitish. Flowers pale red, in dense lateral and termi- 

 nal heads or whorls. Whole plant covered with white soft 

 down. Wild Basil. 



2. P.'aristatumMich.: leaves lanceolate-ovate, subserrate, on very 

 short petioles, whitish ; heads sessile ; bracts awned. Nepeta virginica 

 Linn. 



HAB. Woods. M4- to Car. W. to Tenn. July, Aug. It. Stem 

 I 2 feet high. Upper leaves hoary. Floicers very small, white, . 

 in one or two sessile whorls and a terminal head. Bracts and 

 calyx terminated by long awns. 



3. P. linifolium Pursh: stem straight,' much branched, somewhat 

 scabrous ; leaves linear,' 3-rierved, very entire, smooth ; heads termi- 

 nal, in a fasciculate corymb. Brachystemum virginiacm Mich. B. lini- 

 folium mild. 



HAB. Woods. N. Y. to Car. W. to Miss. July, Aug. It- 

 Stem 12 18 inches high, with trichotomous fastigiate branches, 

 Flowers white, minute, spotted internally. Virginian Thyme- 



* * Stamens included. 



4. P. lanceolatum Pursh: stem straight, branched, somewhat rough ; 

 leaves linear-lanceolate, subsessile, very entire, veined ; heads termi- 

 nal, sessile, in fascicled corymbs. P. mrginicum. Brachystemum lan- 

 ceolatum Willd. 



HAB. Hills. Penn. to Car. July, Aug. It* Stem 2 feet high. 

 Flowers minute, white, in heads which form irregular corymbs. 



5. P. muticum Pers. : leaves ovate-lanceolate, subdentate, smoothish; 

 heads terminal ; bracts lanceolate, somewhat' acute. Brachystemum 

 muticum Mich. ^ . 



.HAB. Rocky hills. Penn. to Geor. July, Aug. It. Stem 2 

 feet high. Leaves large. Flozoers whitish, small, in loosely 

 flowered heads. 



6. P. verticillatum Pers. : leaves ovate-lanceolate, sometimes tooth- 

 ed : whorls sessile, compact; bracts acuminate. Brachystemum verti- 

 cillatum Mich. 



HAB. Mountains. Penn. to Car. July, Aug. It. Stem 2 feet, 

 high, very pubescent when young. Flowers small, white. 



5. THYMUS. Linn. 



Calyx subcaffipanulate, orifice cJosecl with villous hairs. 

 Carol shortly 2-Jipped ; upper one notched ; the lower one the 

 largest, submarginate. Didynamia. Gymnospcrmia. 



T. serpyllum Linn. : stems branched, decumbent ; leaves flat, ovate, 



obtuse, entire, petioled, more or less ciliate at base ; flowers capitate. 



HAB. Fields. Penn. ; naturalized. Nutt. July, Aug. II- Stem 



spreading, procumbent, branched. Leaves more or less hairy. 



- Flowers purple or white, in heads, on short hairy pedicels. 



Wild Thyme. ' 



