116 LABIATAE, Vor. III. 
14. DRACOCEPHALUM [Tourn.] L. Sp. Pl. 594. 1753. 
[Puysostecia Benth. Lab. Gen. & Sp. 504. 1834.] 
Erect perennial glabrous or puberulent herbs, with serrate, dentate or entire leaves, and 
large or middle-sized, bracted purple violet, pink or white flowers in terminal spikes, or 
spike-like racemes. Calyx campanulate or oblong, membranous, swollen and remaining open 
in fruit, faintly reticulate-veined and 1o-nerved, equally 5-toothed. Corolla much longer than 
the calyx, its tube gradually much enlarged upward, its limb strongly 2-lipped; upper lip 
concave, rounded, nearly or quite entire; lower lip spreading, 3-lobed, the middle lobe com- 
monly emarginate. Stamens 4, didynamous, ascending under the upper lip of the corolla, the 
lower pair the longer; filaments pubescent; anthers all alike, 2-celled, the sacs nearly parallel, 
the margins of their valves commonly spinulose or denticulate. Ovary 4-parted. Nutlets 
ovoid-triquetrous, smooth. [Greek, dragon-head.] 
About 7 species, natives of North America, known as False Dragon-head or Lion’s-heart. Type 
species: Dracocephalum virginianum L. 
Flowers 9” long, or more; leaves firm. 
Spike dense, many-flowered. I 
Spike loose, few-flowered ; leaf-serrations mostly blunt. 2 
Flowers 5”-7” long; leaves thin. 
Spike loose; 4’-8’ long; leaves few and distant. 3. D.intermedium. 
Spike dense, 1’-4’ long; stem leafy. 4. D. Nuttallii, 
. D. virginianum. 
D. denticulatum. 
1. Dracocephalum virginidnum L. Dragon-head. Obedient Plant. Lion’s 
Heart. Fig. 3599. 
Dracocephalum virginianum L. Sp. Pl. 594. 1753. 
Dracocephalum speciosum Sweet, Brit. Fl. Gard. 
pl. 93. 1825. 
Physostegia virginiana Benth. Lab. Gen. & Sp. 
504. 1834. 
Stem erect or ascending, rather stout, sim- 
ple or branched above, 1°-4° tall. Leaves 
firm, lanceolate, oblong-lanceolate, or linear- 
lanceolate, acuminate at the apex, sharply 
serrate or serrulate, narrowed at the base, 
the upper all sessile, 2’-5’ long, 2’-7” wide, 
the lowest petioled; bracts lanceolate, shorter 
than the calyx; spikes dense, becoming 4’-8’ 
long in fruit, many-flowered; flowering calyx 
campanulate or somewhat turbinate, its teeth 
ovate, acute, about one-half as long as the 
tube; fruiting calyx oblong, 4’-5” long, the 
teeth much shorter than the tube; corolla 
pale purple or rose, about 1’ long, often var- 
iegated with white, temporarily remaining in 
whatever position it is placed. 
In moist soil, Quebec to Ontario, Minnesota, Arkansas, Florida, Louisiana and Texas ; escaped 
from gardens eastward. Races differ in width and serration of leaves and in size of flowers. 
July—Sept. 
Physostegia Digitalis Small, with broadly oblong to elliptic repand or undulate leaves, of the 
Southern States, perhaps extends northward into Missouri. 
