LABIATAE (MINT FAMILY) 701 



1. B. NIGRA L. (BLACK HOREHOUND.) More or less hairy, but green, erect ; 

 the root perennial ; leaves ovate, toothed ; whorls many-flowered, dense ; calyx- 

 teeth 6, longer than the tube of the purplish corolla. Waste places, N. E., Pa., 

 etc., rare. (Nat. from Eu.) 



*>ti 

 19. STACHYS [Tourn.] L. HEDGE NETTLE 



Corolla not dilated at the throat ; upper lip erect or rather spreading, often 

 arched, entire or nearly so ; the lower usually longer and spreading, 3-lobed, 

 with the middle lobe largest and nearly entire. Stamens 4, ascending under the 

 upper lip (often reflexed on the throat after flowering) ; anthers approximate in 

 pairs. Nutlets obtuse, not truncate. Whorls 2-many-flowered, approximate 

 in a terminal raceme or spike (whence the name, from <rrdxvs, a spike). 



a. Annuals. 



Stem sinoothish ; corolla yellow, much exceeding- the calyx . . . I. 8. annua. 

 Stem hirsute ; corolla purplish, about equaling the calyx . . 2. S. artensis. 



a. Perennials b. 



l>. Stems glabrous on the sides, smooth or bristly on the angles c. 

 c. Calyx-teeth triangular-lanceolate, about equaling the tube. 



Leaves entire or obscurely toothed, linear or linear-oblong . 3. S. hyssopifolia. 



Leaves regularly serrate or serrulate. 



Leaves 5-13 mm. broad, their petioles 1-3 mm. long . . . 4. S. ambigua. 

 Leaves broader, their petioles 5-15(-20) mm. long. 

 Leaves rounded-truncate to cuneate at base, acute or merely 



acuminate at tip 5. S. tenuifolia. 



Leaves heart-shaped at base, caudate-acuminate at tip . 6. S. Nuttallii. 



c. Calyx-teeth broadly deltoid, much shorter than the tube . . . 7. S. latidens. 

 &. Stems pubescent (or puberulent) on the sides as well as on the angles. 



Leaves linear to linear-lanceolate, 10-12 times as long as broad . 8. S. arenicola. 



Leaves broader, oblong to cordate-ovate. 

 Leaves subsessile or very short-petioled, the lower petioles not 



conspicuously longer than the upper 9. S. palustris. 



Lower leaves on elongate petioles, the upper on shorter petioles or 



Calyx-teeth broad-deltoid, much shorter than the tube . . 10. S. cordata. 

 Calyx-teeth lance-deltoid, nearly equaling the tube . . .11. S. salvioides. 



S. ANNUA L. Erect smoothish annual ; leaves oblong to oblanceolate, the 

 lower crenate, the upper subentire ; calyx pilose and glandular-puberal ent, 6-8 

 mm. long, the subequal lanceolate lobes about equaling the tube ; corolla yellow, 

 1.6 cm. long. Waste places and ballast, chiefly about Atlantic ports. July, 

 Aug. (Adv. from Eu.) 



2. S. ARVENSIS L. Low decumbent annual; stems hirsute; leaves ovate, 

 crenate, subcordate, hirsute, the lower long-petioled ; calyx 4.5-6 mm. long, 

 hirsute, about equaling the purplish corolla. Waste places and ballast, chiefly 

 near Atlantic ports. (Adv. from Eu.) 



3. S. hyssopifblia Michx. Smooth and glabrous, or the nodes hirsute ; steins 

 slender, 2-5 dm. high ; leaves linear-oblong or narrowly linear, sessile, entire or 

 obscurely toothed toward the apex, 2-5 cm. long, 3-10 mm. wide ; whorls 4-6- 

 flowered, rather distant ; corolla twice or thrice the length of the triangular- 

 awl-shaped spreading calyx-teeth. Wet sandy places, Mass, to Fla. ; s. Mich. 

 July-Sept. 



4. S. ambigua (Gray) Britton. Resembling the preceding, but stouter, with 

 scattered retrorse bristles on the angles of the stem, and with serrulate leaves 

 about 1 cm. broad. (S. hyssopifolia, var. Gray.) Pa. to Wise., and southw. 

 June-Aug. 



5. S. tenuifblia Willd. Rootstock slender; stem slender, smooth and gla- 

 brous throughout, or with few minute bristles on the angles ; leaves lanceolate 

 to oblong, taper-pointed, sharply toothed, mostly 5-10 cm. long, short-petioled, 

 only the lower floral longer than the flowers ; spike slender and interrupted ; 

 calyx glabrous, the tube rather slender, the lance-subulate teeth somewhat 

 spreading. (S. aspera, var. glabra Gray.) Wet ground, N. Y. to la., and 

 southw. 



Var. aspera (Michx.) Fernald. Angles of the stem beset with long reflexed 

 bristle*; leaves oblong- to ovate-lanceolate, 'short-petioled, more or less hairy; 



