LABIATAE. 



[Vol,. III. 



2. Dracocephalum Moldavica 



L. Moldavian Dragon-head. 



(Fig. 3097. ) 



Dracocephalum Moldavica L- Sp. PI. 595. 

 1753- 

 Annual, puberulent; stem erect, 



usually widely branched, 



!high. 



Leaves oblong or linear-oblong, den- 

 tate or somewhat incised, obtuse at the 

 apex, usually narrowed at the base, 

 i / -2 / long, 2 // -6 // wide; clusters loose, 

 few-flowered, commonly numerous, 

 mostly axillary; bracts narrowly ob- 

 long, usually shorter than the calyx, 

 deeply pectinate with aristate teeth; 

 pedicels 2 // ~4 // long; calyx slightly 

 curved, the 2 lower teeth somewhat 

 shorter than the 3 broader equal upper 

 ones; corolla 2-3 times as long as the 

 calyx. 



In a canon near Spring View, Neb. 

 Also in northern Mexico. Introduced 

 from central Europe. June-Aug. 



12. PRUNELLA L. Sp. PI. 600. 1753. 



Perennial simple or sometimes branched herbs, with petioled leaves, and rather small clus- 

 tered purple or white flowers, in terminal and sometimes also axillary dense bracted spikes 

 or heads. Calyx oblong, reticulate-veined, about 10-nerved, deeply 2-lipped, closed in fruit; 

 upper lip nearly truncate, or with 3 short teeth; lower lip 2-cleft, its teeth lanceolate. Corolla- 

 tube inflated, slightly narrowed at the mouth, its limb strongly 2-lipped; upper lip entire, 

 arched; lower lip spreading, 3-lobed. Stamens 4, didynamous, ascending under the upper 

 lip of the corolla, the lower pair the longer; filaments of the longer stamens 2-toothed at 

 the summit, one of the teeth bearing the anther, the other sterile; anthers 2-celled, the sacs 

 divergent or divaricate. Ovary deeply 4-parted. Nutlets ovoid, smooth. [Origin of name 

 doubtful; often spelled Brunella, the pre-Linnaean form.] 



About 5 species, of wide geographic distribution. Only the following occur in North America. 

 Leaves entire or crenate. 1. P. vulgaris. 



Leaves pinnatifid or deeply incised. 2. P. laciniata. 



i. Prunella vulgaris L. Self-heal. 

 Heal-all. (Fig. 3098.) 



Prunella vulgaris L- Sp. PI. 600. 1753. 



Pubescent or nearly glabrous; stem slen- 

 der, procumbent or ascending or erect, usu- 

 ally simple, but sometimes considerably 

 branched, 2 / -2 high. Leaves ovate, oblong 

 or oblong-lanceolate, obtuse or subacute at 

 the apex, usually narrowed at the base, rather 

 thin, entire or crenate, i / -4 / long, the lowest 

 commonly shorter and sometimes subcor- 

 date; spikes terminal, sessile or short-pedun- 



cled, very dense, Yz'-\' long in flower, be- 

 coming 2 / -4 / long in fruit; bracts broadly 

 ovate-orbicular, cuspidate, more or less cili- 

 ate; corolla violet, purple, or sometimes 

 white, 4 // -6 // long, about twice as long as 

 the purplish or green calyx; calyx-teeth 

 often ciliate. 



In fields, woods and waste places throughout 

 nearly the whole of North America. Natural- 

 ized from Europe. Native also of Asia. Pos- 

 sibly native in northern British America. Other 

 names are Thimble-flower, All-heal, Brown- 

 wort, Carpenter's-herb, Hook-heal, Heart-of- 

 the-earth, Sicklewort, Blue-curls. Mav-Oct. 



