376 LABIATE. (MINT FAMILY.) 



beneath ; calyx teeth subulate, and, like the bracts, commonly bearded. 

 Woods and fence-rows. August -Sept. Stem 2 -4 high. Leaves 2' -3' 

 long. Flowers white. 



2. P. albescens, Gray. Smoother ; leaves smaller ; calyx teeth shorter 

 ami broader, obtuse, beardless ; otherwise like the preceding. With the 

 last. August - Sept. 



3. P. Tullia, Benth. Villous-pubescent ; leaves ovate or oblong, acute or 

 acuminate, the upper eanescent ; whorls large, loose, axillary and terminal ; 

 calyx teeth subulate, long-bearded like the bracts ; the 2 lower as long as the 

 tube. Mountains, Alabama to North Carolina. August -Sept. Stem 2 -3 

 high. Leaves 2'- 4' long. 



Var. dubium, Gray. Green throughout; calyx teeth shorter. Ashe 

 County, North Carolina (Gray $ Casey). 



* * Calyx teeth nearly equal. 



*- Calyx as long as the corolla; the teeth subulate and awn-pointed, like the rigid 



bracts : cymes dense-flowered. 



4. P. aristatum, Michx. Tomentose and hoary, or sometimes hairy ; 

 stem branched ; leaves ovate or oblong, acute, sparingly serrate, rounded at 

 the base, short-petioled, the uppermost somewhat whitened; cymes mostly 

 terminal ; ovary bearded. Var. HYSSOPIFOLIUM, Gray. Stem simple or 

 corymbose above; leaves rigid, linear-oblong, obtuse, entire. Low ground. 

 August - Sept. Stem 1-J - 3 high. Leaves 1' - 2' long. 



-i- H- Calyx teeth beardless and aivnless : cyjnes capitate, mostly terminal: bracts 

 shorter than the flowers: leaves subsessile. 



5. P. pilosum, Nutt. Softly pubescent or villous ; branches short, erect ; 

 leaves lanceolate, entire, acute at each end, none of them whitened ; cymes 

 small, compact, corymbose ; calyx teeth ovate-lanceolate, acute, and, like the 

 bracts, hoary -tomentose. Upper districts of Georgia, and northward. Au- 

 gust - Sept. Stem 2 high. Leaves 1' - 2' long. 



6. P. muticum, Pers. Smooth or tomentose ; stem corymbosely 

 branched; leaves ovate or ovate-lanceolate, acute, serrate, rounded or slightly 

 cordate at the base, sessile or short-petioled, the uppermost whitened ; cvmes 

 small, compact, corymbose, minutely hoary-tomentose ; calyx teeth short, 

 triangular-ovate, obtuse. Dry soil. August -Sept. Stem l-2 high. 

 Leaves l'-2' long. 



7. P. leptodon, Benth. Stem 2 -3 high, slightly pubescent; leaves 

 oblong-lanceolate, serrate, smooth and green on both sides, the floral ones 

 faintly whitened ; cymes compact ; calyx teeth subulate, shorter than the tube, 

 hirsute, like the slender-pointed bracts. Mountains of North Carolina. 

 August. 



8. P. Torreyi, Benth. Stem more or less pubescent, nearly simple; 

 leaves (not whitened) linear-lanceolate, acute at both ends, nearly sessile and 

 entire; calyx teeth subulate. Tennessee (Dr. Gattinger), and northward. 

 Stem 2 -3 high. Leaves 2' long. 



