692 LABIATAE (MINT FAMILY^ 



4> 4- 4- 4- Upper pair of stamens shorter or wanting ; anthers 2-celled ; upper lip of corolla neltbei 



galeate nor concave. 

 ++ Flowers in more or less crowded clusters or whorls, axillary or spicate. 

 = Corolla more or less 2-lipped. 

 a. Stamens (often only 2 in no. 23) ascending or arcuate, often more or less converging (or ascend- 

 ing parallel under the erect upper hp in no. 25). 



23. Hedeoma. Calyx gibbous on the lower side, hairy in the throat. Flowers loose. 



24. Melissa. Calyx tubular-bell-shaped, flattish on the upper side. Corolla curved upward. 



25. Satureja. Calyx bell-shaped or tubular, 10-13-nerved. Tube of corolla straight. 



h. Stamens distant and straight, often divergent, never convergent nor curved. 

 1. Stamens 4 ; calyx 10-15-nerved, hairy in the throat (except no. 26). 



26. Hyssopus. Calyx tubular, 15-nerved, equally 5-toothed. Stamens exserted. 



27. Origanum. Calyx ovoid-bell-shaped, 5-toothed. Spikes with large colored bracts. 



28. Pycnanthemum. Calyx ovoid or short-tubular, equally 5-toothed or somewhat 2-lipped 



Flowers in dense heads or clusters. • 



29. Thymus. Calyx ovoid, nodding in fruit, 2-lipped. Bracts minute. Leaves very small. 



2. Stamens 2, with or without rudiments of the upper pair. 

 80. Cunila. Calyx very hairy in tne throat, equally 5-toothed. Corolla small. 

 = = Corolla not evidently 2-lipped, but almost equally 4-lobed, small ; stamens erect, distant. 



31. Lycopus. Fertile stamens 2 ; often also 2 sterile filaments without anthers. 



32. Mentha. Fertile stamens 4, nearly equal. 



•M- ++ Flowers in loose terminal panicled racemes ; calyx 2-lipped, enlarged and declined in fruit. 



33. CoUinsonia. Lower lobe of corolla fimbriate, much the larger. Stamens 2. 



34. Perilla. Corolla short, the lower lobe little larger. Stamens 4, included. 



-M- ■^+ -H- Flowers in dense spikes ; calyx hardly 2-hpped, the teeth equal 



35. ElSholtzia. Coiolla slightly 2-lipped. Stamens 4, exserted. 



1. AjUGA L. Bugle Weed 



Calvx 5-toothed. The large and spreading lower 

 lip of the corolla with the middle lobe emarginate 

 or 2-cleft. Stamens as in Teucrium, but anther- 

 cells less confluent. (From a- privative, and ^1^76^, 

 — IjSit'm jugum, — yoke, from the seeming absence 

 of a yoke-fellow to the lower lip of the corolla.) 



1. A. REPTANS L. Perennial, 1-2.5 dm. high, 

 smooth or but slightly pubescent, with copious 

 creeping stolons; leaves obovate or spatulate, 

 sometimes sinuate, the cauline sessile, the floral 

 approximate, subtending several sessile blue flow- 

 ers. — Locally in fields. Me. and Que. to s, N, Y. 

 May-July. (Nat. from Eu.) 

 _ 2. A. GENEVENSis L. Similar ; the stems copi- 



A. genevensis. ously soft-pubescent, tufted, not stoloniferous ; 



Inflorescence x i/g. Flower X 11/2 leaves somewhat pubescent ; flowers larger. — 

 Locally in fields, waste places, etc., N. E., N. Y., 

 and Pa. (Introd. from Eu.) Fig. 884. 



2. TEtrCRIUM [Tourn.] L. Germander 



Calyx 5-toothed. Corolla with the 4 upper lobes nearly equal, oblong, turned 

 forward, so that there seems to be no upper lip ; the lower lobe much larger. 

 Stamens 4, exserted from the deep cleft between the 2 upper lobes of the corolla • 

 anther-cells confluent. (Named for Teucer^ king of Troy.) 



