306 LABIATiE. (mint FAMILY.) 



late, varying to Ianceolate,,)"a<7!er rigid, acute, rounded or slightly heart-shaped at 

 the base, mostly sessile and minutely sharp-toothed, prominently veined, green 

 when old ; the floral ones, bracts, and triangular-ovate calyx-teeth, hoarg mth 

 a fine close down. — Dry hills, Maine to Ohio, Kentucky, and southward. Aug. 

 — Flowers in very dense clusters ; the outer bracts ovate-lanceolate and pointed, 

 tlie others pointless. 



* * 4t: * Calyx equally 5-tootJted: flowers collected in dense and ghhular, often flxsci- 

 cled, small and numerous heads, which are crowded in terminal corymbs: bracts 

 rigid, closely appressed, shorter than the flowers : lips of the corolla very shoi-t : 

 leaves narrow, sessile, entire, rigid, crowded and clustered in the axils. 



7. P. IanceoIa.tUin, Pursh. SmootUsh or minutely pubescent (2° high); 

 leaves lanceolate or lance-linear, obtuse at the base ; heads downy ; calyx-teeth short 

 and triangular. — Dry thickets ; common. July - Sept. 



8. P. linifwliuin, Pursh. Smooth or nearly so (l°-2° high); leaves 

 narrower and heads less downy than in the last ; the nan'ower bracts and lance- 

 awl-shaped calyx-teeth pungeiitly pointed. — Thickets, S. New England to Illinois, 

 and southwai-d . July - Sept. 



***** Calyx equally 5-toothed: flowers collected in few and solitary large and 

 globular heads {terminal, and in the upper axils of the membranaceous petioled 

 leaves) ; the bracts loose, ciliate-bearded. 



9. P. montanuin, Michx. Stem (l°-3°high) and ovate- or oblong- 

 lanceolate serrate leaves glabrous ; bracts very acute or awl-pointed, the outer- 

 most ovate and leaf-like, the inner linear ; teeth of the tubular calyx short and 

 acute. — AUeghanies, from S. "Virginia southward. July. — Flavor warm and 

 pleasant. Foliage and heads like a Monarda. 



9. ORIGANUM, L. "Wild Maejokam. 



Calyx ovate-bell-shaped, hairy in the throat, striate, 5-toothed. Tube of the 

 corolla about the length of the calyx, 2-lipped ; the upper lip rather erect and 

 slightly notched ; the lower longer, of 3 nearly equal spreading lobes. Stamens 

 4, exserted, diverging. — Perennials, with nearly entire leaves, and purplish 

 flowers crowded in cylindrical or oblong spikes, which are imbricated with col- 

 ored bracts. (An ancient Greek name, said to be from opos, a mountain, and 

 ydvos, delight.) 



1 , O. vuLoiKE, L. XJpright, hairy, coiymbose at the summit ; leaves peti- 

 oled, round-ovate ; bracts ovate, obtuse, purplish. — Dry banks, sparingly intro- 

 duced eastward. June - Oct. (Nat. from Eu.) 



10. THYMUS, L. Thyme. 



Calyx ovate, 2-lipped, 13-nerved, hairy in the throat; the upper lip 3-toothcd, 

 spreading; the lower 2-cleft, with the awl-shaped divisions ciliate. Corolla 

 short, slightly 2-lipped ; the upper lip straight and flattish, notched at the apex ; 

 the lower 3-eleft. Stamens 4, straight and distant, usually exserted. — Low pe- 

 rennials, with small and entire strongly-veined leaves, and purplish or whitlsi. 



