^'ERVAIX FAMILY 741 



keeled. Corolla 2-lipped; tube curved; limb 4-lobed, oblique. Stamens 4, 

 did>Tnous; connective of* the anthers not appendaged. Ovarv- 2-celled; stigma 

 oblique; OATiles solitan,' in each cell. Fruit tardily separating into two nutlets. 

 [Lippia in part.] 



Leaves from linear-oblanceolat« to cuneat€, 2-8-toothed above; pedvmcles slightly if any 



exceeding the leaves. 1. P. cuneifolia. 



Leaves lanceolate, oblong, or oval, sharply serrate; peduncles much exceeding the leaves. 



2. P. lanceolata. 



1. P. cuneifolia (Torr.) Greene. Stems branched at the base, procumbent 

 or creeping, 2-10 dm. long; leaves opposite and more or less fascicled in the 

 axils: blades 1-3 cm. long; midvein prominent, the lateral ones obsolete; corolla 

 purplish or whitish, 4 mm. long. Lippia cuneifolia (Torr.j Steud. Plains and 

 prairies: S.D. — Tex. — Ariz. — Wyo. Plain — Submont. Je— Au. 



2. P. lanceolata (Michx.) Greene. Stem branched from the base, pro- 

 cimibent, 1-4 dm. long; leaves opposite, rarely fasciculate; blades elliptic-lance- 

 olate, 1.5-5 cm. long, acute, with about 4 pairs of lateral veins: corolla pale blue, 

 2-2.5 ram. long. Valleys; Ont. — Fla. — Tex. — Xeb. Plain — Son. Je-0. 



Family 115. LAMIACEAE. Mixx Family. 



Aromatic herbs or shrubs, ■n'ith 4-angled stems. Leaves opposite or 

 whorled, simple, usually toothed or lobed, glandular-punctate. Flowers 

 perfect, irregular, zygomorphic, or nearly regular, pseudo-verticillate, i. e., 

 in congested axillar}' reduced chines. Cah'x of 5 united sepals, sometimes 

 regular, sometimes irregular, and then u.sually 2-lipped. Corolla bilabiate, 

 or nearly regular. Stamens 4, did^iiamous, or one of the pairs abortive; 

 anthers 2-celled. Gynoecium of united carpels; ovars' 4-lobed and 4-celled; 

 styles united, arising between the lobes; stigma terminal :'o^'ules solitary in 

 each cell. Fruit of 4 nutlets, included in the persistent calj-x. Endosperm 

 flesh}' or wanting. 



Ovarj- of 4 united nutlets: style not basai: nutlets laterally attached. 

 Corolla strongly bilateral, the upper Up very smaU. rhelower large. 



Flowers in small congested c\Tnes, axillary to small bracts, and forming a raceme- 

 Uke panicle; calyx-lobes shorter than "the tube; leaves toothed. 



1. Tetcrium. 

 Flowers soUtarj- in the axils of bracts similar to the leaves : calyx-lobes longer 

 than the tube: leaves lactniate. 2. Melosmox. 



Corolla ahnost regularly 5-lobed, but lobes declined; stamens long-exserted and 

 coiled. 3. Trichostem.\. 



Ovarj- of 4 distinct or nearly distinct nutlets; styles basal; nutlets basally attached. 

 Corolla bilabiate. 



Calyx 2-hpped; both Ups entire; stamens 4. 



Calyx not inflated, the upper lip with a crest on the upper side. 



4. SCTTELL-\RL\. 



Calj-x inflated, without a crest. 5. SAL.\^Z-^_RL\ 



Calj-x either 2-hpped and at least one of the lips toothed, or regularly 4-.5-toothed. 

 Stamens included in the coroUa-tube. 6. MAERCBiirM. 



Stamens exserted from the tube. 

 Upper Up of the coroUa concave. 

 Anther-bearing stamens 4. 



Upper stamens longer than the lower. 

 Calyx 5-toothed. 



Anther-sacs paraUel or nearly so; stamens divergent. 



7. AG AST ACHE. 



Anther-sacs divaricate; anther approximate in pairs. 



Flowers in terminal spikes; floral leaves reduced; plant 



erect. S. Xepeta. 



Flowers in axillary verticils; floral leaves like the rest; 

 plant spreading. 9. Glecoma. 



Calyx distinctly 2-Upped. 10. MoU)A^^CA. 



Upper stamens shorter than the lower. 



Calj-x distinctly 2-Upped, closed in fruit. 11. Prxtxella. 

 Cal>'x 5-toothed. not 2-Upped. open in fruit. 



Calyx membranous, inflated in fruit, faintly nerved. 



12. DR-VCOCEPHALUM. 



Calyx not membranous, not inflated in fruit, strongly 5-10- 

 ner^-ed. 



