- 
% 
a 
2 
| 
Oe ee ea, 
SS eS 
PHYSOSTEGIA LABIAT A 557 
MARRUBIUM 
larged upward; upper lip concave, rounded, entire ; the lower one 
spreading, 3-lobed, the middle lobe commonly emarginate. Sta- 
mens 4, ascending under the upper lip of the corolla, the lower 
pair the longest ; filaments pubescent; anthers all alike, 2-celled, 
the cells nearly parallel, the margins of their valves commonly 
spinulose or denticulate. Nutlets ovoid-triquetrous, smooth. 
~P. parviflora Nutt. Benth. in DC. Prodr. xii, 487 as synonym. 
Glabrous: stems rather stout, 1-3 feet high, simple, or branched above: 
leaves mostly lanceolate, acute, or the lower ones obtuse, at the apex, 
sharply serrate, somewhat narrowed at base. all sessile or the lowest 
petioled, 3-4 inches long, 3-10 lines wide: spikes several- many-flowered, 
1-4 inches long: bracts ovate or ovate-lanceolate, acute, shorter than the 
calyx: calyx in flower campanulate, 2 lines long, its teeth ovate. obtuse or 
acutish, becoming globose-oblong in fruit: corolla purple, 6 lines long. 
In moist meadows, northwestern Oregon to Brit. Columbia and Minnesota. 
18 MARRUBIUM L. Sp. 582. 
_ Perennial herbs with petioled dentate leaves and small flowers 
in dense axillary clusters. Calyx tubular, 5-10-nerved, regularly 
5-10-toothed, the teeth nearly equal, or the alternate ones short- 
er, acute or acutish, spreading or recurved in fruit. Corolla 
bilabiate, the upper lip erect, entire or emarginate, the lower 
spreading, 2-cleft, its broader middle lobe commonly emarginate. 
Stamens 4, included, the posterior pair the shorter. Anthers 2- 
celled, the cells divergent, Nutlets ovoid, smooth. 
M. vuieare I. Sp. 583. (Wuite Hoarnounp.) Stems erect, stout, 
1-3 feet high, white-woolly, much branched, the branches ascending : 
leaves oval or broadly ovate to nearly orbicular, rugose-veined, obtuse at 
the apex, crenate-dentate, rounded, narrowed or subcordate at base, 1-2 
inches long, rough, whitish above, woolly beneath, on petioles 6-12 lines 
long: flowers in dense many-flowered axillary clusters: calyx-teeth usually 
10, glabrous above, woolly below subulate, more or less recurved: cvrolla 
white, 3-4 lines long. In waste piaces: naturalized from Europe. 
19 LEONURUS L. Sp. 584. 
Tall perennial herbs’ with palmately cleft, parted or dentate 
leaves and small white or pink flowers in dense verticillate axil- 
lary clusters. Calyx tubular-campanulate, 5-nerved, nearly reg- 
ular and equally 5-toothed, the teeth rigid, subulate or aristate. 
Corolla bilabiate: upper lip erect, concave or nearly flat, entire: 
lower lip spreading, or deflexed, 3-lobed, the middle lobe broad, 
obcordate or emarginate. Stamens 4, the anterior pair longest: 
anthers 2-celled, the cells mostly parallel. Nutlets 3-sided, smooth. 
L. Carpraca L. Sp. 584. Puberulent perennial: stems rather stout, 
strict, commonly branched, 2-5 feet high, the branches straight and as- 
cending: leaves membranaceous, the lower nearly orbicular, palmately 
3-5-cleft; 2-4 inches broad, the lobes acuminate, incised or dentate, upper 
narrowly oblong-lanceolate or rhombic, 3-cleft or the upper merely 3-tvoth- 
ed, all slender-petioled, canescently puberulent beneath, green above: 
flowers in dense glomerate clusters in the axils of the upper leaves, shorter 
than the petioles: calyx glabrous, about 3 lines long, its teeth lanceolate- 
subulate, somewhat spreading, nearly as long as the tube: corolla pink. 
purple or white, 3-5 lines long, its tube with an oblique ring of hairs with- 
