696 



LABIATAE (MINT FAMILY) 



888. S. nervosa. 

 An upper node x %. 

 Nutlet x 5. 



- H- Flowers 5-10 mm. long ; leaves at most 2 cm. long. 



11. S. parvula Michx. Herbaceous; subterranean stolons monilifo'fiK-tuber* 

 iferous; pubescent throughout with spreading often viscid hairs, dwarf (0.8-3 

 din. high), branched and spreading ; all but the lower leaves sessile and entire 

 or sparingly toothed, the lowest round-ovate, the others ovate or lance-ovate, 

 slightly heart-shaped ; flowers axillary. (Including var. mol- 

 lis Gray; S. campestris Britton.) Sandy banks, Vt. and 

 w. Que. to Mich., s. to Tenn. and Tex. Apr.-July. 



Var. ambigua (Nutt.) Fernald. Minutely puberulent or 

 glabrate. (S. parvula Britton, not Michx.) Me. to Wise., 

 Ky., and Tex. 



2. Nutlets conspicuously winged, each raised on a slender 

 base. 



* 2 ' e nerv ^ sa Pursh. Smooth, simple or branched, 

 slender, 1.5-5 dm. high ; lower leaves roundish, the middle 

 ovate, toothed, somewhat heart-shaped, 2-4.5 cm. long, the 

 floral ovate-lanceolate, entire ; nerve-like veins prominent beneath ; corolla bluish, 

 1 cm. long, the lower lip exceeding the concave upper one. Moist thickets and 

 rich woods, s. Ont. and N. Y. to Mo. and N. C. FIG. 888. 



6. MARRtTBIUM [Tourn.] L. HOREHOUND 



Calyx-teeth more or less spiny-pointed and spreading at maturity. Upper 

 lip of the corolla erect, notched, the lower spreading, 3-cleft, its middle lobe 

 broadest. Stamens 4. Whitish-woolly bitter-aromatic perennials, branched 

 at the base, with rugose and crenate or cut leaves, 

 and many-flowered axillary whorls. (A name used 

 by Pliny, from the Hebrew marrob, a bitter juice.) 



1. M. VULGARE L. (COMMON H.) Stems ascend- 

 ing ; leaves round-ovate, petioled, crenate-toothed ; 

 whorls capitate ; calyx with 10 recurved teeth, the 

 alternate ones shorter ; corolla small, white. Waste 

 places, Me. to Ont., westw. and south w. June- Aug. 

 (Nat. from Eu.) FIG. 889. 



889. M. vulgare. 

 Node x %. Fruiting calyx x 2. 



7. AGASTACHE Clayt. GIANT HYSSOP 



Calyx tubular-bell-shaped, 15-nerved, oblique, 5-toothed, the upper teeth 

 rather longer than the others. Upper lip of corolla nearly erect, 2-lobed, the 

 lower 3-cleft, with the middle lobe crenate. Stamens 4, exserted ; the upper 

 pair declined, the lower and shorter pair ascending, so 

 that the pairs cross ; anther-cells nearly parallel. 

 Perennial tall herbs, with petioled serrate leaves, and 

 small flowers crowded in interrupted terminal spikes 

 in summer. (From &yav, much, and o-rdxvs, an ear 

 of corn, in reference to the numerous spikes.) Lo- 

 PHANTHUS Benth., in part. 



1. A. nepetoides (L.) Ktze. Stem stout, 0.7-1.5 m. 

 high, sharply 4-angled, smooth or nearly so ; leaves 

 ovate, somewhat pointed, coarsely crenate-toothed, 

 5-12 cm. long ; spikes 3-12 cm. long, crowded with 

 the ovate pointed bracts ; calyx-teeth ovate, rather 

 obtuse, little shorter than the pale greenish-yellow 

 corolla. (Lophanthus Benth.) Borders of woods, 

 e. Mass., Vt., and w. Que. to Minn., and southw. 



2. A. scrophulariaefblia (Willd.) Ktze. Stem (ob- 

 tusely 4-angled) and lower surface of the ovate or 

 somewhat heart-shaped acute leaves slightly pubescent ; 



890. A. scrophulariaefolia. 

 Node and spike x %. 

 Flower x 2. 



