Fam. 117. Labiatae Juss. Mint Family 



Plants herbaceous annuals or perennials with spreading rhizomes, occasionally 

 woody shrubs; stems typically square; leaves opposite; flowers variously arranged; 

 calyx usually more or less 2-lipped. the upper 3 teeth more or less joined, the 

 lower pair of teeth usually free, occasionally all teeth subequal, the tube mostly 

 enlarged in fruit; corolla obscurely to distinctly 2-lipped, the upper 2 petals usually 

 joined to form an erect sometimes galeate lip that includes the stamens or some- 

 times very short and deeply notched, occasionally with the 5 lobes subequal, the 

 lower lip usually spreading with its midlobe sometimes dipperlike; stamens 2 or 

 4, mostly in 2 unequal pairs, the connective sometimes strongly developed at 

 the expense of the filament; anthers parallel or divergent, with one cell sometimes 

 completely or partly aborted; style bifid at apex, arising between the quite distinct 

 lobes of the 4-lobed ovary or from near the apex of the ovary when the lobes 

 (and the cocci) are partly united below. 



A large family of about 3,500 species in 180 genera of world-wide distribution. 

 The typically aromatic plants provide many herbs used as condiments. The 

 family contains numerous important honey plants. 



1. Ovary 4-lobed; style not basal; cocci almost completely united, laterally or 

 obliquely attached 1. Teucrium 



1. Ovary of 4 distinct or nearly distinct lobes; style basal; cocci essentially free, 



basally attached (2) 



2(1). Calyx 2-lipped, the lips entire 2. Scutellaria 



2. Calyx regularly 5- (rarely 10-) toothed or 2-lipped with 3 teeth on the upper 



lip and 2 teeth on the lower lip (3) 



3(2). Stamens declined toward or resting on the lower lip of the corolla, 2 long 

 and 2 short; corolla declined, the upper lip with 4 entire lobes, the 

 lower lip saccate and abruptly deflexed at the contracted and cal- 

 lous base 3. Hyptis 



3. Stamens not declined and resting on the lower lip of the corolla (4) 



4(3). Fertile stamens 4, all with 2-celIed anthers; upper lip of corolla usually 

 but not always galeate or concave (5) 



4. Fertile stamens 2 or (if 4) the upper pair shorter than the lower pair and the 



upper corolla lip neither galeate nor concave (10) 



5(4). Upper pair of filaments longer than the lower pair (6) 



5. Upper pair of filaments shorter than the lower pair (8) 



6(5). Anther sacs parallel or nearly so; stamens evidently exserted, readily 

 visible 4. Agastache 



6. Anther sacs widely divergent; stamens ascending under the more or less 



galeately rounded upper lip of the corolla, scarcely or not at all 

 exserted (7) 



7(6). Calyx regular or nearly so, with subequal teeth 5. Nepeta 



1. Calyx strongly irregular, with the upper teeth much broader than the other 4 

 6. Dracocephahim 



8(5). Calyx strongly 2-lipped 7. Prunella 



8. Calyx not 2-lipped, the lobes essentially similar (9) 



9(8). Tube of the calyx faintly nerved, inflated at maturity 8. Physostegia 



9. Tube of the calyx prominently 5- or 10-nerved, not inflated at maturity 



9. Stachys 



1407 



