696 



LABI AT AE (MINT FAMILY) 



•«- -^ Flowers 5-10 mm. long ; leaves at most 2 cm. long. 



\\. S. parvula Michx. Herbaceous; subterranean stolons monilif orm-tuher- 

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

 dm. 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. 



S. nervosa. 

 An upper node x i/^. 



Nutlet X 5. 



12. S. nervbsa 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. MARRtrBIUM [Tourn.J 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. vulgXre 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. 



M. vulg-are. 

 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 dyap, much, and crrdxvs, 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 ^w6escewi/ 



A. scrophulariaefolia. 

 Node and spike x i^. 

 Flower x 2. 



