LABIATE. XXXVII. PYCHNANTHEMUM. XXXVIII. MONAEDELLA. 



763 



acuminated, hoary ; calycine teeth short, acuminated, pilose at 

 top; flowers spotted. Tf.. 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. 5 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. If.. H. Native from Maryland to 

 Upper Carolina. P. verticillatum, Pursh, fl. amer. sept. 2. p. 

 410. exclusive of the syn. of Michx. Origanum clinopodioides, 

 Walt. fl. car. ex Pursh. 1. c. Herb a little branched, quite gla- 

 brous, pale green. Leaves lj to 2 inches long. Corolla hardly 

 longer than the calyx, whitish. Stamens a little exserted. 



y5?wied-calyxed Pyehnanthemum. Fl. Aug. Clt. 1752. PI. 

 1 foot. 



5 P. TORRE'I (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. If. . H. Native of 

 the State of New York, near Princeton, Torrey ; and of South 

 Carolina, Mitchell. Stem a little branched, pubescent. Leaves 

 1 to 2g 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. HYSSOPIFOLIUM (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 1 ; corolla 

 almost glabrous inside. % . H. Native of Virginia, Carolina, 

 Georgia, and Louisiana. P. setosum, 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- 

 tatum. 



Hyssop-leaved Pychnanthemum. PI. 1 to 1| foot. 



SECT. II. BRACHYSTE'MON (from fipaxys, brachys, short ; and 

 trrrifjiuv, 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. MD'TICUM (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. 1. 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. PILOSUM (Nutt. gen. amer. 2. p. 33.) stem pilose, 

 branched a little at top ; leaves lanceolate, pilose beneath, with 



prominent veins, obscurely denticulated ; bracteas length of 

 calyxes, clothed with hoary pubescence ; heads larger than in 

 P. lanceolatum. y.. 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. 

 muticum. 



Pilose Pychnanthemum. PI. 1 to 2 feet. 



9 P. LANCEOLA'TUM (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, If.. H. Native of Pennsylvania, even 

 to Upper Carolina, among the mountains. Allied to P. muti- 

 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. 



Far. a, latifolium (Benth. lab. p. 330.) leaves broader. 1|. 

 H. Brachystemum verticillatum, Michx. fl. bor. amer. 2. p. 6. 

 t. 31. Thymus verticillatus, Poir. diet. 7. p. 653. P. verticil- 

 latum, Pers. ench. 2. p. 128. 



Far. /3, angustifclium (Benth. lab. p. 330.) leaves narrower. 

 7f . H. Nepeta Virginica, Willd. spec. 3. p. 56. Brachyste- 

 mum Virginicum, Michx. fl. bor. amer. 2. p. 6. P. Virginicum, 

 Pers. ench. 2. p. 128. Brachystemum lanceolatum, Willd. enum. 

 2. p. 623. Thymus lanceolatus, Poir. suppl. 5. p. 305. 



Lanceolate-leaved Pychnanthemum. Fl. July, Aug. Clt. 

 1812. PI. 1 to 2 feet. 



10 P. LINIFOLIUM (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 1 ; calycine teeth lanceolate-subulate, short, 

 acute, stiff 1 ; corolla villous inside at the throat. If . H. Na- 

 tive from New England to Carolina ; Georgia, and New Or- 

 leans. P. tenuif olium, Schrad. in Steud. nom. 669. ? Thymus 

 Virginicus, Lin. syst. p. 453. Brachystemum linifblium, Willd. 

 enum. p. 623. Koellia capitata, Mcench. meth. p. 408. Ori- 

 ganum flexuosum, Walt. fl. car. p. 165. ex Pursh. Herm. par. 

 218. ? Habit of P. muticum. Margins of leaves subrevolute. 

 Stamens a little exserted. Corolla whitish. 



Flax-leaved Pychnanthemum. Fl. July, Aug. Clt. 1739. 

 PI. 1 to 2 feet. 



11 P. NU'DUM (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. If.. 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. Fl. July, Aug. Clt. 1824. PI. 1 

 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. ofMonarda.) Benth. 

 lab. p. 331. Pychnanthemum species, Michx. and other authors. 



LIN. SYST. Didynamia, Gymnospermia. Calyx ovate-tubular, 

 often elongated, 10-13-nerved, 5 - toothed : teeth short, nearly 

 5 E 2 



