420 XCIII. LABIATE. THYMUS. 



3. P. PILOSUM. Nutt. Hairy Pycnanthemum. 



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

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

 calyx, canescently villous and awnless; cor. pubescent; sta. exserted. 7J. 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 ; Ivs. ovate-lanceolate, 



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

 minate, awnless; sta. included. i\. 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. verticillatum. Pers. 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-corymbed ; bracts linear-lanceolate, acu- 

 minate ; sta. exserted. 7J. 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-leaved Pycnanthemum. 



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

 entire, 3-veined, smooth ; hds. terminal, dense, in a fasciculate corymb. 9| 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. 

 Aug. 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. VULGARE. Wild Marjoram. 



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

 late, smooth, erect ; bracts ovate, longer than the calyx, colored. 7J. 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-fourth 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. Maznch.) Sweet Marjoram. 

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

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

 7J. Native of Portugal, cultivated in gardens. It has a pleasant 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. Svpos, courage ; on account of its invigorating smell. 



Flowers capitate or verticillate ; calyx subcampanulate, bilabiate, 



