9 o 



LABIATAE. 



[Vol. III. 



2. Physostegia denticulata (Ait.) Britton. Few-flowered Lion's Heart. 



(Fig. 3101.) 



Prasium purpureum Walt. Fl. Car. 166. 1788? 

 Dracoccphalum denticulatum Ait. Hort. Kew. 2: 317. 



1789. 

 Physostegia Virgimana var. denticulata A. Gray, Syn. 



Fl. 2: Part 1. 383. 1878. 

 Physostegia denticulata Britton Mem. Torr. Club, 5: 



284. 1894. 



Stem slender, ascending or erect, simple, or 

 little branched, i-2 high. Leaves firm or rather 

 thin, oblong, linear-oblong, or oblanceolate, obtuse 

 or acute at the apex, narrowed at the base, crenu- 

 late, obtusely dentate, or entire, if-jf long, 2 // -6 // 

 wide, the upper sessile, the lower slender-petioled; 

 spike loosely few-several-flowered; bracts lanceo- 

 late, little longer than the fruiting pedicels; flower- 

 ing calyx oval-campanulate, its teeth acute, 

 about one-third as long as the tube; fruiting calyx 

 oblong, ?,"-\" long; corolla rose-pink, nearly or 

 quite 1/ long. 



In moist soil, Virginia to Florida and Texas. June- 

 Aug. 



3. Physostegia intermedia (Nutt.)A. 

 Gray. Slender Lion's Heart. (Fig. 3102.) 



Dracocephalum intermedium Nutt. Trans. Am. 



Phil. Soc. (II.) 5: 187. 183^-37- 

 Physostegia intermedia A. Gray, Proc. Am. Acad. 



8: 371. 1872. 



Stem very slender, usually quite simple, i-3 

 high. Leaves usually few pairs, remote, thin, 

 mostly shorter than the internodes, narrowly 

 lanceolate or linear, acute or acuminate at the 

 apex, repand-denticulate, little narrowed at the 

 base, all sessile, or the lowest petioled, 2 / ~3 / 

 long, 2 // -4 // wide; spikes very slender, remotely 

 many-flowered, 4 / -8 / long in fruit; lower bracts 

 often nearly as long as the campanulate calyx; 

 calyx-teeth acute, shorter than the tube; fruit- 

 ing calyx broadly oval, 2 // -2> // long; corolla 

 much dilated above, 5 // -7 // long. 



On prairies, western Kentucky (according to 

 Gray), Louisiana, Arkansas and Texas. May-July. 



4. Physostegia parviflora Nutt. Purple 

 or Western Lion's Heart. (Fig. 3103.) 



Physostegia parviflora Nutt.; Benth. in DC. Prodr. 



12: 434. As synonym. 1848. 



Stem rather stout, usually simple, i-3 high, 

 Leaves lanceolate, oblong-lanceolate, or ovate- 

 lanceolate, acute, acuminate or the lower ob- 

 tuse at the apex, sharply serrate or dentate, 

 somewhat narrowed at the base, all sessile or 

 the lowest petioled, 3 '-4' long, 3 // -lo // wide; 

 spikes densely several-many-flowered, i / -4 / 

 long; bracts ovate or ovate-lauccolate, acute, 

 shorter than the calyx; flowering calyx cam- 

 panulate, its teeth ovate, obtuse or subacute, 

 about one-third as long as the tube; fruiting 

 calyx globose-oblong, 1"-$" long; corolla pur- 

 ple, 6" long. 



In moist soil, Minnesota to Nebraska, west to 

 British Columbia and Oregon. June-Aug. 



