322 



LAMIACEAE. 



1. Sideritis romana L. Irox-wort. 

 (Fig. 344.) Annual, erect, 4-1° high, pu- 

 bescent with spreading hairs, usually 

 branched. Leaves obovate to oblong, V-IY 

 long, crenate, sessile or nearly so; clusters 

 few-flowered; flowers white or pinkish; 

 calyx-teeth shorter than the tube, the middle 

 one of the upper lip ovate, all subulate- 

 tipped; corolla a little exceeding the calyx, 

 the middle lobe of the lower lip reniform. 



Occasional in waste grounds. Naturalized. 

 Native of Europe. Introduced Into the United 

 States. Flowers in spring. 



2. PRUNELLA L. 

 Perennial Jierbs, with petioled leaves, 

 and rather small clustered purple or white 

 flowers, in 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. Corolla-tube in- 

 flated, slightly narrowed at the mouth, its limb strongly 2-lipped; upper lip 

 entire, arched; lower lip spreading, 3-lobed. 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. Nutlets ovoid, smooth. 

 [Origin of name doubtful; often spelled Brunella, the pre-Linnaean form.] 

 About 5 species, natives of the North temperate zone, the following typical. 



1. Prunella vulgaris L. 



Self-heal. Heal-all. (Fig. 

 345.) Stem slender, 2° high 

 or less. Leaves ovate, ob- 

 long or oblong-lanceolate, 

 rather thin, 1-4' long, the 

 lowest commonly shorter and 

 sometimes subcordate ; spikes 

 terminal, sessile or short- 

 peduncled, becoming 2'-4' 

 long in fruit; bracts broadly 

 ovate-orbicular, cuspidate, 

 ciliate ; corolla violet, purple 

 or sometimes white, 4"-6" 

 long, about twice as long 

 as the calyx. 



Grassy woodlands, Devon- 

 shire and on St. David's 

 Island. Introduced. Native of 

 Europe. Widely naturalized 

 in North America. Flowers 

 from spring to autumn. 



