Vol. III.] 



MINT FAMILY. 



87 



Ovary deeply 4- parted. 



not exserted, the upper pair the longer; anther-sacs divergent, 

 Nutlets ovoid, smooth. [Greek name for thyme, or pennyroyal.] 

 About 6 species of Europe and Asia. 



1. Glecoma hederacea L. Ground 



Ivy. Gill-over-the-Ground. 



Field Balm. (Fig. 3095.) 



Glecoma hederacea L. Sp. PI. 578. 1753. 

 N.Glechoma Benth. I.ab.Gen.& Sp. 4S5. 1834. 

 X. hederacea B.S.P. Prel. Cat. N. Y. 43. 1S88. 

 Perennial, pubescent,the creeping stems 

 leafy, sometimes iS' long, the branch- 

 es ascending. Lower petioles commonly 

 longer than the leaves; leaves green both 

 sides, li'-iyi' in diameter; clusters few- 

 flowered, the flowers -"-\o" long, short- 

 pedicelled; bractlets subulate, shorter than 

 the calyx; calyx puberulent, its teeth 

 acute or lanceolate-acuminate, about one- 

 third as long as the tube; corolla-tube 2-3 

 times as long as the calyx; upper pair of 

 stamens much longer than the lower. 



In waste places, woods and thickets, New- 

 foundland to Ontario and Minnesota, south 

 to Georgia and Kansas. Old names, Ale- 

 hoof, Cat's-foot, Gill, Gill-ale, Gill-go-by-the- 

 ground, Hayhofe, Haymaids, Hove, Tun- 

 hoof, Creeping Charlie. March-May. 



II. DRACOCEPHALUM L. Sp. PI. 594. 1753. 



Perennial herbs, with dentate entire or incised leaves, and blue or purple flowers in 

 axillary and terminal bracted clusters, the bracts pectinate in our species. Calyx tubular, 

 15-nerved, straight or incurved, 5-toothed, the upper tooth much larger than the others, or 

 2-lippcd with the 3 upper teeth more or less united. Corolla expanded above, its limb 

 2-lippcd; upper lip erect, cniarginate; lower lip spreading, 3-lobed, the middle lobe larger 

 than the lateral ones, sometimes 2-cleft. Stamens 4, didynamous, ascending under the upper 

 lip, the upper pair longer than the lower; anthers 2-celIed, the sacs divaricate; style 2-cleft 

 at the summit; ovary deeply 4-parted. Nutlets ovoid, smooth. [Greek, dragon-head.] 



About 35 species, natives of the northern hemisphere. Only the following are known in North 

 America. 



Corolla scarcely exceeding the calyx; clusters mostly terminal, dense. i. D. parinflonint. 



Corolla 2-3 times as long as the calyx; clusters mostly axillary. 2. D. Moldavica. 



I. Dracocephalum parviflorum 



Nutt. American Dragon-head. 

 (Fig. 3096.) 



D. parviflorum Nutt. Gen. 2: 35. 1818. 



Annual or biennial, somewhat pubes- 

 cent, or glabrous; stem rather stout, usu- 

 ally branched, 6'-2° high. Leaves lan- 

 ceolate, ovate, or oblong, slender petioled, 

 serrate, or the lower incised, acute or ob- 

 tuse at the apex, rounded or narrowed at 

 the base, thin, i'-3' long; clusters dense, 

 many-flowered, crowded in dense terminal 

 spikes, and sometimes also in the upper 

 axils; bracts ovatfe to oblong, pectinate 

 with awn-pointed teeth, shorter than or 

 equalling the calyx; pedicels i"-2" long; 

 upper tooth of the calyx ovate-oblong, 

 longer than the narrower lower and lateral 

 ones, all acuminate; corolla light blue, 

 scarcely longer than the calyx. 



In dry gravelly or rocky soil, northern 

 New York and Ontario to Minnesota and 

 Alaska, south in the Rocky Mountains to 

 Arizona and New Mexico. May-Aug. 



/. 



