420 XCIII. LABIATE. Thymus. 



3. P. piLosuM. Nutt. Hairy Pycnanthcmum. 



St. and Ivs. beneath pilose ; sf. subsimple ; Ivs. lanceolate, nearly entire, 

 sessile; ^s. in large, terminal, sessile heads; bracts lanceolate, and, with the 

 calj'X, canescently villous and awnless; cor. pubescent; sla. exserted. — % Low 

 grounds, 111. Mead, to Tenn. Nuttall. I am unacquainted with this species, 

 but it is probably distinct, closely allied to the last. " Stem a little branched at 

 the summit. Bracts shorter than the calyx, acute but not awned. Calyx teeth 

 minute. Corolla white, without spots." 



4. P. MUTicuM. (Brachystemum muticum. Michx.) Awnless Pycnanthe- 

 mum. — St. pubescent, paniculate-branching above ; Ics. ovate-lanceolate, 



subdentate, sessile, nearly smooth ; hds. terminal ; bracts ovate-lanceolate, acu- 

 minate, awnless; sta. included. — %. Found in woods and dry hills, Penn. toGa. 

 and W. States. Stem 2f high, square, with larger, opposite leaves and white 

 flowers. Leaves large, the width a third of the length, entire or denticulate. 

 Heads mostly terminal, and with the bracts and upper leaves, whitish pubes- 

 cent. Corolla tinged with purple, with spots of a deeper hue. Aug. 



5. P. LANCEOLATUM. Pursh. (P. vcrticillatum. Pcrs. Brachystemum 

 Virginicum. Mx. ?) — St. straight, corymbosely branched, pubescent on 



the angles ; Ivs. subsessile, ovate-lanceolate and linear-lanceolate, feather-vein- 

 ed, entire ; verticils sessile, fasciculate-corymbcd ; bra/:ts linear-lanceolate, acu- 

 minate ; sta. exserted. — % This species much resembles the next, but is distinct 

 in several important characters. Grows in dry woods and hills, abundant 

 W. and Mid. States. Stem 2 or more feet high, square, with obtuse angles, 

 somewhat scabrous. Branches corymbed, downy above. Leaves varying in 

 width from one-sixth to one-half of their length. Flowers collected in. dense, 

 canescent heads. Corolla purplish- white with darker spots. Aug. 



6. P. LiNiFOLiuM. Pursh. Flax-leared Pycnanthemum. 



St. straight, smooth ; branches trichotomous, fastigiate ; Ivs. linear, very- 

 entire, 3-veined, smooth; hds. terminal, dense, in a fasciculate corymb. — % An 

 erect plant with fastigiate branches, l^f high, growing in exsiccated swamps, 

 Penn., N. Y. to the Miss, and S. States. Stem often purplish, slightly 4-an- 

 gled, corymbose at the summit. Leaves very narrow, entire, smooth and punc- 

 tate, with fascicles of smaller ones in the axils. Flowers small, white, in nu- 

 merous, small, roundish heads, mostly terminal, and with imbricated bracts, 

 j^ug. — I have generally found this species nearly destitute of the mint-like fla- 

 vor of the foregoing. The statement in a former edition was made on the 

 authority of others. 



12. ORIGANUM. 



Gr. opos, a mountain, and yavof, joy. 



Flowers collected into dense clusters, imbricated with bracts ; up- 

 per lip of the corolla erect, flat, emarginate, lower lip with 3 nearly 

 equal segments. 



1. O. VULGAR E. Wild Marjoravi. 



Ijvs. ovate, entire, hirsute, petiolate ; spikes roundish, panicled, fascicu- 

 late, .smooth, erect ; bracts ovate, longer than the calyx, colored. — % grows in 

 fields and thickets. Stem 12 — 18' high, purple, leafy, "branching above. Leaves 

 a very little serrate, opposite, hairy, sprinkled with resinous dots, paler beneath. 

 Petioles hairy one-lburth as long as the leaves. Bracts tinged with purple. 

 Flowers purplish-white. The plant has a highly aromatic taste. Jl. Aug. | 



2. O. Majorana. Ph. (Majorana hortensis. Maffick.) Sweet Marjoram. — 

 Lvs. oval or obovate, obtuse, entire, petiolate, hoary-pubescent; spikes roundish, 

 compact, pedunculate, clustered at the end of the branches; bracts roundish. — 

 % Native of Portugal, cultivated in gardens. It has a plea.sant aromatic fla- 

 vor, and is employed in various ways as a seasoning. Plant soft-downy, a foot 

 high. Flowers pink-colored. Jl. Aug. :|: 



13. THYMUS. 



Gr. ^Vjiog, courage ; on account of its inviporatin? smell. 



Flowers capitate or verticillate ; calyx subcampanulate, bilabiate, 



