LABIAT#. (MINT FAMILY.) 315 
5. 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; cymes small, com- 
pact, bose, minutely hoary-tomentose ; calyx-teeth short, triangular-ovate, 
obtuse. —Dry soil, Florida to Mississippi, and northward. Aug. and Sept.— 
Stem 19 - 29 high. Leaves 1/-2! long. 
+ + + Cymes capitate, in compact corymbose clusters: bracts shorter than the 
flowers: stem and rigid entire leaves smoothish. 
6. P. lanceolatum, Pursh. Stem branched ; leaves lanceolate or linear- 
lanceolate, acute, rounded at the base; cymes numerous, pubescent; bracts 
ovate-lanceolate ; calyx-teeth short, triangular. — Dry soil in the upper districts. 
Aug. and Sept. — Stem 2° high. Leaves 1'-2' long. 
7. P. linifolium, Pursh. Stem branched; leaves very numerous, linear, 
sessile; cymes smoothish ; bracts linear, acute ; calyx-teeth lanceolate-subulate, 
rigid, acute. — Dry soil, Florida to Mississippi, and northward. Aug. and Sept. 
— Stem 2° high. 
8. P. nudum, Nutt. Smooth; stem simple or corymbose at the summit, 
straight; leaves sessile, ovate-oblong, obtuse, rounded at the base; cymes 
smooth; exterior bracts narrow-lanceolate, the inner short, subulate; calyx- 
teeth short, triangular-lanceolate, and, like the corolla, pubescent. — Low pine - 
barrens, Dale County, Alabama, to the mountains of North Carolina. Aug. 
and Sept. — Stem 2° high. Leaves 1'- 1’ long. - 
+ + + + Cymes axillary and terminal, large, dense-flowered : bracts ciliate. 
9. P. montanum, Michx. Stem slender, smooth, simple or branched; 
leaves smooth, ovate-lanceolate, serrate, acute, tapering into a short petiole, the 
lowest rounded at the base; cymes globose, the upper ones closely sessile ; 
bracts numerous, ciliate; the exterior ovate, very acute, as long as the flowers, 
the inner ones linear; calyx-teeth short, acute; ovary bearded. — Mountains of 
ne Carolina. July and Aug.— Stem 19 - 39 high. Leaves 2! —3! long. 
7. COLLINSONIA, L. Homzse-Barx. 
Calyx obovate, enlarged and deflexed in fruit, 2-lipped; the upper lip flat- - 
tened, truncate, 3-toothed, the lower 2-cleft. Corolla funnel-shaped, 2-lipped, 
dilated at the throat; the four upper lobes equal, the lowest larger; declining, 
toothed or fimbriate. Stamens 2 or 4, long-exserted, spreading: anther-cells 
diverging. Nutlets smooth. — —Strong-scented perennial herbs. Leaves large, 
Coarsely serrate, dotted beneath. Flowers yellowish, solitary, opposite, in 
racemes or panicles. Petioles tumid at the base. 
* Fertile stamens 2. ; be 
t NOU Gus detuls, L. Nearly smooth; leaves ovate er oni 
acuminate, sharply serrate, acute, rounded or cordate at the base, long-peti 
: ‘the uppermost smaller, sessile; panicle elongated; bracts minute, very : oe 
2 pro ee viver mck doner han domes 
