79 2 FLORA. 



nerved, 5 -toothed, the teeth nearly equal in our species. Corolla purple in our 

 species, its tube narrow, the limb strongly 2-lipped ; upper lip erect, concave, entire 

 or emarginate; lower lip spreading, 3-cleft, the middle lobe broader than the lateral 

 ones, sometimes 2-lobed. Anthers contiguous in pairs, 2-celled, the sacs mostly 

 divergent. Nutlets ovoid or oblong. [Geeek, a spike, from the spicate inflores- 

 cence.] About 150 species, of wide distribution. Besides the following, some 12 

 others occur in the southern and western U. S. 



Leaves narrowed at the base, linear to lanceolate or oblong. 

 Stem glabrous ; leaves entire, or nearly so. 



Leaves linear, 2-5 mm. wide. i. S, hyssopifolia. 



Leaves oblong to linear-oblong, 4-10 mm. wide. 2. S. Atlantica. 



Stem retrorsely hirsute ; leaves serrate. 



Leaves slightly pubescent ; calyx-teeth lanceolate. 3. S. ambigua. 



Whole plant densely clothed with stiff appressed hairs. 4. S. arenicola. 

 Leaves cordate or truncate at the base, lanceolate to ovate. 

 Stem glabrous or nearly so. 



Calyx-teeth lanceolate-subulate, nearly as long as the tube. 5. S. tenuifolia. 

 Calyx-teeth triangular, about one-fourth as long as the tube. 6. S. latidens. 

 Stem hirsute. 



Leaves all very short-petioled, lanceolate to oblong. 7. S. palustris. 



Leaves, at least the lower, slender-petioled. 



Leaves lanceolate or ovate, acute or acuminate. 



Plant dark green ; leaves firm ; petioles 6-36 mm. long. 



8. S. aspera. 

 Plant light green ; leaves membranous ; petioles 1-5 cm. long. 



9. S. cordata. 

 Leaves ovate, obtuse ; diffuse annual. 10. S. arvensts. 



Whole plant densely white-villous ; introduced species. u. S. Germanica. 



1. Stachys hyssopifolia Michx. HYSSOP HEDGE NETTLE. (I. F. f. 3116.) 

 Perennial, glabrous or nearly so, sometimes slightly hirsute at the nodes; stem slen- 

 der, erect, 3-5 dm. high. Leaves linear, acute at both ends, short-petioled or sessile, 

 entire, or sparingly denticulate with low teeth, 2-5 cm. long, the uppermost reduced 

 to short bracts ; clusters forming an interrupted spike; fruiting calyx glabrous or 

 slightly hirsute, 6 mm. long, its teeth lanceolate-subulate, nearly as long as the 

 tube; corolla about 1.5 cm. long, light purple, glabrous. In fields and thickets, 

 Mass, to Fla., Mich, and Va. July-Sept. 



2. Stachys Atlantica Britton, n. sp. COAST HEDGE NETTLE. Perennial, 

 glabrous, or with a few hairs at the nodes, weak, 2-4 dm. high. Leaves thin, 

 mostly oblong and obtuse or obtusish, spreading, 2-5 cm. long, usually over 5 mm. 

 wide, remotely denticulate, the upper sometimes rounded at the base; corolla I cm. 

 lon^- fruiting calyx 5 mm. long, its teeth triangular-ovate, acuminate. In marshy 

 ground, L. A., to eastern Penn. Type from Southampton, L. I. Aug. -Sept. 



Stachys jinnua L. An annual Enrooean species with lanceolate to oblong leaves, at 

 least the lower crenate-dentate, a siender puberulent stem, and villous calyx, has been 

 found at one locality in Kansas, and in ballast about the seaports. 



3. Stachys ambigua (A. Gray) Britton. DENSE- FLOWERED HEDGE NETTLE. 

 (I. F. f. 3117.) Perennial; stem retrorsely hispid, at least below, 3-6 dm. high. 

 Leaves oblong, oblong-lanceolate, or linear, pubescent or glabrate, acuminate or 

 acute, 4-20 mm. wide, 2-8 cm. long, serrulate; clusters in a terminal rather dense 

 spike, and usually also in the upper axils; calyx more or less hirsute, 5 mm. long, 

 its lanceolate-subulate teeth more than one-half as long as the tube. In moist soil, 

 Penn. to Ga., 111. 'and Ky. July-Aug. 



4. Stachys arenicola Britton, n. sp. SAND HEDGE NETTLE. Perennial, 

 very densely pubescent, 5-8 dm. high. Leaves lanceolate, narrowed at the base, 

 sessile, finely crenate-dentate, acuminate, 6-10 cm. long, the upper much smaller; 

 upper bracts little longer than the flowers; calyx-teeth subulate-acicular, about as 

 long as the tube; corolla about I cm. long. In sandy soil, southern N. Y. to 111. 

 and Mich. Type from New Dorp, Staten Island, N. Y. 



5. Stachys tenuifolia Willd. SMOOTH HEDGE NETTLE. (I. F. f. 3118.) 

 Perennial; stem smooth, or slightly scabrous on the angles, slender, 3-8 dm. high. 

 Leaves lanceolate, oblong, or ovate-lanceolate, slender-petioled, thin, acuminate at 



