LABIATA. XXXVII. PxcHNANTHEMUM. 
acuminated, hoary ; calycine teeth short, acuminated, pilose at 
top; flowers spotted. 2t. H. Native of Georgia. Allied to 
P. lanata ; but readily distinguished from it, in the shorter, 
more glabrous leaves, more humble stature, and spotted flowers. 
Cymes large, usually terminal. Bracteas canescent. Corolla 
white or pale red, spotted with red.—-A beautiful species, having 
the fragrance of Penny-Royal. 
Lomis's Pychnanthemum. PI. 3 to 1 foot. 
4 P. arista‘tum (Michx. fl. bor. amer. 2. p. 8. t. 33.) leaves 
on short petioles, oblong, acute, a little serrated, rounded at the 
base, glabrous on both surfaces, or scarcely tomentose; whorls 
many-flowered, dense; bracteas very acute: outer ones oblong : 
inner ones subulate ; calycine teeth equal, acute, a little awned ; 
corolla pubescent inside. 2%. H. Native from Maryland to 
Upper Carolina. P. verticillàtum, Pursh, fl. amer. sept. 2. p. 
410. exclusive of the syn. of Michx. Origanum clinopodioides, 
Walt. fl. car. ex Pursh.l. c. Herba little branched, quite gla- 
brous, pale green. Leaves 1} to 2 inches long. Corolla hardly 
longer than the calyx, whitish. Stamens a little exserted. 
ZA wned-calyxed Pychnanthemum. FI. Aug. Clt. 1752. 
1 foot. 
5 P. Torre’: (Benth. lab. p. 329.) leaves on short petioles, 
oblong-lanceolate or linear, acute, scarcely serrated, narrowed a 
long way at the base, almost glabrous; whorls dense, subcorym- 
bose; bracteas oblong or subulate, awned ; calycine teeth nearly 
equal, subulate; corolla pubescent inside. Y%.H. Native of 
the State of New York, near Princeton, Torrey ; and of South 
Carolina, Mitchell. Stem a little branched, pubescent. Leaves 
1 to 23 inches long, green, finely downy on the veins. Calyxes 
and bracteas clothed with soft villi. Stamens exserted, 
Torrey's Pychnanthemum. PI. 1 to 2 feet. 
6 P. uyssorirotium (Benth. lab. p. 329.) leaves almost ses- 
sile, oblong-lanceolate or linear, obtuse, nearly quite entire, 
glabrous, or clothed with fine tomentum ; whorls few, many- 
flowered, rather loose; bracteas subulate, awned: outer ones 
oblong; teeth of calyx nearly equal, subulate, stiff; corolla 
almost glabrous inside. 2t. H. Native of Virginia, Carolina, 
Georgia, and Louisiana. P. setdsum, Nutt. in journ. acad. sc. 
phil. 7. p. 100. ? Herb a little branched, usually canescent 
from fine tomentum. Leaves an inch long, very rarely subser- 
rated, with often fascicles of smaller ones in the axils. Bracteas 
exceeding the calyxes. Flowers similar to those of P. aris- 
tàtum. 
Hyssop-leaved Pychnanthemum. 
PI. 
Pl. 1 to 13 foot. 
Sect. II. Bracuyste‘mon (from fjpaxve, brachys, short ; and 
ornpwy, stemon, a stamen.) Benth. lab. p. 329. Calyx ovate, 
with short equal teeth. Whorls dense, numerous, head-formed, 
almost all terminal and panicled. Bracteas oblong, lanceolate, 
or subulate, adpressed. Leaves usually sessile. 
7 P. mu‘ricum (Pers, ench. 2. p. 128.) pubescent ; stem pani- 
cled at top; leaves sessile, ovate-lanceolate, acute, a little ser- 
rated, rounded at the base, stiff: upper ones white on both sur- 
faces; whorls very dense, capitate ; bracteas ovate-lanceolate ; 
calyxes bluntly and almost equally toothed ; throat of corolla 
villous inside. 2t. H. Native of Upper Carolina; at St. 
Louis and West Chester, Drummond; Arkansas, Nuttall. 
Stems branched, green, villous, pubescent, or almost glabrous, 
as well as the lower leaves; but the upper leaves and whorls 
are white from tomentum. Leaves sometimes all entire, but the 
lower ones are usually serrated. Corolla white ; lower lip dotted 
with purple. 
Mutic Pychnanthemum. PI. 1 to 2 feet. 
8 P. rirósum (Nutt. gen. amer. 2. p. 33.) stem pilose, 
branched a little at top; leaves lanceolate, pilose beneath, with 
XXXVIII. MoxNARDELLA. 763 
prominent veins, obscurely denticulated ; bracteas length of 
calyxes, clothed with hoary pubescence; heads larger than in 
P. lanceolàtum. 4%. H. Native of Kentucky and Tenessee, 
in valleys. Beck, in Sill. amer. journ. sc. 14. p. 117. Stems 
and leaves more or less pilose. Heads terminal, large. Bracteas 
and calyxes villous, mutic. Stamens exserted. Corolla pu- 
bescent, spotless. Said by Bentham to be the same as P. 
mülicum. s 
Pilose Pychnanthemum. PI. 1 to 2 feet. 
9 P. raNcEOLA'rUM (Pursh, fl. amer. sept. 2. p. 410.) stem 
panicled at top, with pubescent angles; leaves sessile, ovate- 
lanceolate or lanceolate, quite entire, rounded at the base, stiff, 
almost glabrous; whorls dense, numerous, villous; bracteas 
ovate-lanceolate ; calyxes bluntly and unequally toothed ; throat 
of corolla villous inside. 2/. H. Native of Pennsylvania, even 
to Upper Carolina, among the mountains. Allied to P. màti- 
cum; but differs in the stem being more glabrous, and in the 
leaves being quite entire and all green. Stem often purplish. 
Leaves sometimes glabrous and sometimes villous. Corolla usu- 
ally spotted, but sometimes also spotless. 
Var. a, latifolium (Benth. lab. p. 330.) leaves broader. H. 
H. Brachystémum verticillàtum, Michx. fl. bor. amer. 2. p. 6. 
t. 31. Thymus verticillàtus, Poir. dict. 7. p. 653. P. verticil- 
làtum, Pers. ench. 2. p. 128. : 
Var. D, angustifolium (Benth. lab. p. 330.) leaves narrower. 
%4. H.  Népeta Virgínica, Willd. spec. 3. p. 56. Brachysté- 
mum Virgínicum, Michx. fl. bor. amer. 2. p. 6. P. Virginicum, 
Pers. ench. 2. p. 128. Brachystémum lanceolàtum, Willd. enum. 
2. p. 628. Thymus lanceolàtus, Poir. suppl. 5. p. 305. 
Lanceolate-leaved Pychnanthemum. Fl. July, Aug. Clt. 
1812. Pl. 1 to 2 feet. 
10 P. rixiróüLrUM (Pursh, fl. amer. sept. 2. p. 409.) gla- 
brous; stem panicled at top; leaves sessile, linear, quite entire, 
stiff; whorls dense, numerous, terminal, almost glabrous; brac- 
teas linear, acute, stiff; calycine teeth lanceolate-subulate, short, 
acute, stiff; corolla villous inside at the throat. %.H. Na- 
tive from New England to Carolina; Georgia, and New Or- 
leans. P. tenuifólium, Schrad. in Steud. nom. 669.? Thymus 
Virginicus, Lin. syst. p. 453.  Brachystémum linifolium, Willd. 
enum. p. 623. — Koéllia capitàta, Moench. meth. p. 408. Orí- 
ganum flexuósum, Walt. fl. car. p. 165. ex Pursh. —Herm. par. 
218.? Habit of P. müticum. Margins of leaves subrevolute. 
Stamens a little exserted. Corolla whitish. 
Flax-leaved Pychnanthemum. Fl. July, Aug. Clt. 1739. 
Pl. 1 to 2 feet. 
11 P. nu'pum (Nutt. gen. amer. 2. p. 34.) plant glabrous, 
pale green; stems nearly simple, strict; leaves sessile, ovate- 
oblong, obtuse, quite entire, rounded at the base; whorls 
loose, terminal, corymbosely panicled, glabrous ; outer bracteas 
lanceolate-linear: inner ones very short and subulate; corollas 
pubescent inside. 2t. H. Native of Carolina and Georgia, on 
the mountains. Stems more simple and strict than in other 
species. Leaves erect, with subrevolute edges, scarcely an inch 
long. Corymbs dense. Corolla pubescent, pale. ? Stamens ex- 
serted from the tube, shorter than the limb. 
Naked Pychnanthemum. Fi. July, Aug. Cit. 1824. PI. I 
to 2 feet. 
Cult. Plants of easy culture, very fragrant, but of little 
beauty. The species are readily increased by dividing at the 
root or by seed; and they thrive best in a peat border. 
XXXVIII. MONARDE'LLA (a dim. of Monarda.) Benth. 
lab. p. 331. Pychnánthemum species, Michx. and other authors. 
Lin. syst. Didynàmia, Gymnospérmia. Calyx ovate-tubular, 
often elongated, 10-13-nerved, 5-toothed: teeth short, nearly 
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