MINT FAMILY. 349 



-i- *- Bracts and calyx teeth not awned. 



P. lanceolatum, Pursh. Smoothish, not hoary, very leafy, bushy 

 branched ; leaves small and clustered, narrow-lanceolate or lance-linear, 

 rigid, sessile, obtuse at base ; flowers small, in numerous globular close 

 heads which are crowded in terminal corymbs. Calyx teeth and bracts 

 short, triangular ; lips of the corolla very short. Mass., W. and S. 



P. linifdlium, Pursh. Like the last, less common N. ; smoother, with 

 lance-linear leaves, and narrower sharp-pointed bracts and calyx teeth. 



P. muticum, Pers. Minutely soft^downy but hardly whitened, rather 

 low, bushy-branched ; leaves mostly lance-ovate and sessile, with rounded 

 or slightly heart-shaped base, minutely sharp-toothed, rather rigid ; 

 flowers in heads or dense clusters ; calyx teeth and inner bracts rather 

 blunt. Me., W. and S. 



Var. pildsum, Gray. Downy, with rather long, soft hairs ; the broadish 

 lanceolate leaves acute at both ends and nearly entire ; whorled heads at 

 the end of the branches ; the calyx teeth and bracts ovate-lanceolate and 

 acute. Ohio, W. 



* * Calyx 2-lipped (3 upper teeth united). 



P. incanum, Michx. Leaves petioled, ovate or oblong, remotely 

 toothed, finely soft-downy above and white-hoary beneath, those next 

 the open flat cymes whitened both sides ; bracts and calyx teeth some- 

 what awn-pointed. N. Eng., W. and S. 



17. ORIGANUM, MARJORAM. (Old Greek name, said to mean 

 delight of mountains.') Natives of the Old World; sweet herbs; 

 flowers summer. % 



0. rulgare, Linn. "Wild Marjoram. Old gardens, and wild on some 

 roadsides ; l°-2° high, with small ovate, nearly entire leaves, on short 

 petioles, and purplish flowers in corymbed purple-bracted clusters or 

 short spikes ; calyx equally 5-toothed. 



0. Majorana, Linn. Sweet Marjoram. Cult, in kitchen gardens as 

 an annual ; leaves small and finely soft-downy ; the bracts not colored ; 

 flowers whitish or purplish, with calyx hardly toothed but cleft nearly 

 down on the lower side. « 



18. THYMUS, THYME. (Ancient Greek and Latin name.) Low 

 or creeping, slightly woody-stemmed, sweet-aromatic plants of the 

 Old World ; flowers small, in summer. Leaves in the common species 

 entire, small, from \' to near J' long, ovate, obovate or oblong, with 

 tapering base. % 



T. Serpyllum, Linn. Creeping Thyme. Cult, as a sweet herb, rarely 

 a little spontaneous ; creeping, forming broad flat perennial turfs ; leaves 

 green (a variegated form used for edgings) ; whorls of purplish or flesh- 

 colored flowers crowded or somewhat spiked at the ends of the flowering 

 branches. 



T. vulgaris, Linn. Common Thyme. Sometimes cult. ; more upright 

 and bushy than the other, pale and rather hoary ; flowers in shorter 

 clusters. 



19. CALAMINTHA, CALAMINT. (Greek for beautiful Mint.) 

 Elowers summer. % (Lessons, Fig. 301.) 



* Flowers loose in the axils, or above running into racemes or panicles. 



C. glabella, Benth. A delicate native but uncommon species, from 

 S. Ind., S.; smooth, with weak stems 5'-20' long, also with creeping run- 



