428 LABIATAE (MINT FAMILY) 



Flowers in terminal spikes 1. M, spicata. 



Flowers in axillary whorls , 2. M. canadensis, 



1. Mentha spicata L. Sp. PL 576. 1753. Glabrous perennial with erect 

 stem, 2-4 dm. high: leaves lanceolate, sharply and unequally serrate, acute 

 or acuininate: flowers in narrow spikes, with subulate-lanceolate hracts: calyx 

 campanulate: cofoUa glabrous. Speakmint. — Native from Europe and now 

 common eastward; sparingly introduced in our range. 



2. Mentha canadensis L. Sp. PL 577. 1753. More or less pubescent or 

 villous-hairy, perennial by running rootstocks, 1-3 dm. high: leaves oblong- 

 ovate to oblong-lanceolate, sharply serrate, acute, generally tapering into a 

 slender petiole: flowers in sessile, axillary whorls (the uppermost axils flower- 

 leiss) : calyx hairy, with triangular-subulate teeth about one third as long as 

 the tube. Common Wild Mint. — ^Frequent on ditch and stream banks; jacross 

 the continent. 



4. AGASTACHE Clayt. Giant Hyssop 



Tall perennial herbs, with serrate-petioled leaves and small flowers crowded 

 in interrupted spikes. Calyx tubular-campanulate, 15-nerved and obliquely 

 5-toothed. Corolla bilabiate; the upper lip nearly erect, 2-lobed; t '.e lower 

 somewhat spreading, 3-cleft, with the middle lobe crenate. Stamens 4, ex- 

 serted, the inner pair declined and the outer shorter pair ascending (so that 

 the pairs cross) ; anther cells nearly parallel: Nutlets ovoid, smooth. 



Leaves pale beneath; flowers blue 1. A. anethiodora. 



Leaves green on both sides; flowers light violet or purple . . . 2. A, urticifolia. 



1. Agastache anethiodora (Nutt.) Brit. 111. Fl. 3: 85. 1898. Glabrous or 

 very minutely puberulent, 5-10 dm. high: leaves pale beneath, ovate, often 

 suboordate, acute at apex, anise-scented: spike short and narrow, sometimes 

 leafy below and paniculate: calyx-teeth ovaterlanceolate, acute, tinged with 

 purple or violet: corolla blue, 8-10 mm. long, slightly isurpassing the calyx. 

 liOphanthus anisatus Benth. — ^From the plains of the -Missouri westward to 

 the mountains. 



2. Agastache urticifolia (Benth.) Rydb. Mem. N. Y. Bot. Gard. 1: 339. 

 1900. Glabrous; stems erect and simple, 5-10 dm. high:, leaves glabrous, 

 triangular-ovate, obtuse or acute, truncate or cordate at base, coarsely and 

 irregularly dentate, 3-8 cm. long, on short petioles: spikes dense, 3-7,cm. 

 long; bracts linear-lanceolate, entire or some of the lower ones broader and 

 toothed: calyx campanulate, 7-10 mm. long, the teeth subequal, nearly as long 

 as the tube: corolla violet, purple, or nearly white, 12-14 mm. long. Lophan- 

 thus urticif alius Benth. — In the mountains; from Wyoming far to the north- 

 westward. 



5. HEPETA L. Catmint or Catnip 



A perennial herb with crenate-dentate leaves. Calyx tubular and obliquely 

 S-toothed. Corolla dilated in throat; the upper lip erect, concave, emargin^te 

 or cleft, with the middle lobe largest, either entire or notched. Stamens 4, 

 ascending under the upper lip, the lower pair shorter; anther cells divergent. 



1. Nepeta Cataria L, Sp. PL 570. 1753. Erect, branched, and densely 

 canescent-tomentulose throughout: leaves ovate-cordate, coarsely crenate- 

 dentate: flowers in spites: the corolla white or purplish, dark-dotted, about 

 12 mm. long, the middle lobe of the lower lip crenulate. — Native iii Europe; 

 common in many parts of the United States as a weed about dwellings; not 

 yet extensively introduced in our range. 



6. DRACOCEPHALUM L. Dbagon-head 



Coarse herbs with small blue flowers in bracteate terminal clusters. Calyx 

 tubular, 15-nerved. Corolla 2-lipped, the upper Up erect, emar^nate, the 

 lower 3-lobed. Stamens 4; anther cells divaricate. Nutlets ovoid, smooth, 



