426 LABIATAE (MINT FAMILY) 



nate: calyx-lobes emarginate: corolla-tube longer than the calyx: fruit oblong. 

 Throughout our range and southward. 



2. Lippia lanceolata Michx. Fl. Bor. Am. 2: 15. 1803. Creeping exten- 

 sively or the branches ascending, often rooting at the nodes, green and 

 glabrate or strigillose with forked hairs: leaves thin, oblong-obovate to 

 lanceolate, narrowed at base, sharply "serrate above: peduncles much exceed- 

 ing the leaves ; heads at first globose, becoming short-cylindric ; bracts mucro- 

 nate or pointless: calyx-lobes linear-lanceolate: corolla pale blue, scarcely 

 longer than the calyx: fruit globose. From Colorado eastward and westward 

 to the coasts. 



102. LABIATAE B. Juss. MINT FAMILY 



Chiefly herbs, with aromatic punctate foliage, square stems, and opposite 

 leaves. Flowers axillary, mostly in cymose clusters which are often aggre- 

 gated in terminal spikes or racemes. Corolla more or less bilabiate, the upper 

 lip 2-lobed or entire, the lower 3-lobed. Stamens didynamous or diandrous, 

 inserted on the tube of the corolla. Ovary 4-lobed or 4-parted, forming in fruit 

 4 little seed-like nutlets or achenes, surrounding the base of the single style 

 which is bifid at apex. 



Ovary only 4-lobed, the style not basal; the small lobes of the upper 



lip united to the lateral lobes of the lower 1. Teucrium. 



Ovary deeply 4-parted, the style basal. 



Calyx with a crest-like gibbosity on the upper side ... 2. Scutellaria. 

 Calyx not crested. 



Anther-bearing stamens 4. 



Upper (ppsterior) pair as long as the lower (anterior) . . 3. Mentha. 

 Upper pair longer than the lower. 



Anther sacs parallel or nearly so . .- .4. Agastache. 



Anther sacs divergent. 

 Coarse erect herbs. 



Perennial; corolla well exserted ..... 5. Nepeta. 



Annual or biennial; corolla scarcely longer than the 



calyx ......... 6. Dracocephalum. 



Trailing herbs ........ 7. Glecoma. 



Upper pair shorter than the lower. 



Calyx 2-lipped, closed in fruit ...... 8. Prunella. 



Calyx subequally 5-toothed. 



Membranous and inflated in fruit ..... 9. Physostegia. 



Not membranous, unchanged in fruit. 



Corolla-tube hairy within 10. Leonurus 



Corolla-tube glabrous within. 



Leaves small (about 1 cm. long) . . . .11. Monardella. 



Leaves large (4-8 cm. long) 12. Stachys. 



Anther-bearing stamens 2. 

 Corolla 2-lipped. 



Connective of anther laterally elongated, one end bearing a 



perfect cell, the other a modified abortive one or none 13. Salvia. 

 Connective short. 



Flowers large, in one or few dense capitate clusters . . 14. Monarda. 

 Flowers small, in many axillary clusters .... 15. Hedeoma. 

 Corolla nearly regular 16. Lycopus. 



1. TEUCRIUM L. GERMANDER 



Herbs (ours) with 10-nerved, 5-toothed calyx and tubular corolla with ir- 

 regular limb, the upper and lateral lobes subequal and declined, the lower 

 lobe much larger. Stamens 4, didynamous, exserted from the deep cleft 

 between the two upper lobes of the corolla, the anterior pair the longer; the 

 confluent anther cells divergent. Nutlets rugose-reticulate. 



Leaves undivided . . . . . . . . . . 1. T. occidentale. 



Leaves multifid or incised 2. T. laciniatum. 



1. Teucrium occidentale Gray, Syn. Fl. 2 1 : 349. 1878. Loosely pubescent, 

 branched, 3-5 dm. high: leaves 3-5 cm, long, ovate-oblong to broadly lanceo- 



