612 LABIAT.-E. (MIIST FAMILY.) 



Trjbe 1. I,AVA]NDIIL.E.E. Stamens 4, declined, included. Anthers confluent, 

 1-celled. 



1. LAVANDULA. 2X (5 rnl>escent or canescent plants with spiked inflorescence. 



Tribe 11. SATURIK/IE. Stamens 4 or 2, equal or the anterior longer, distant, di- 

 vergent er ascending. Anthers with 2, parallel or divergent cells. Calyx (in ours) 5-10-13 

 nerved, 



* Corolla ^-toothed, scarcely if at all bilabiate. 



2. MEXTIIA. 2^ Flowers condensed into a terminal spike or head. 



3. LYCOPUS. 21! Flowers in globular, axillary, distant clu.«ters. 



* * Corolla bilabiate. 



4. OEIGANUM. ^ 2f ^P'^^'es ovate or oblong, with imbricated scales. Calyx 5-toothed. 



5. THYMUS. ^ 2£ Whorls interrupted or the terminal capitate. Calyx bilabiate. 



6. SATUEEIA. If 5 ^yllorls axillary or the terminal spiked. Calyx 5-toothed. 



7. MICEOMEIilA. 2f 5 t'yme^ a^'^'^iT; n^oi'^ or less distant. Calyx small, 5-toothed. 



8. TIIYMBRA. ^ Whorls crowded in a terminal spike. Calyx flattened, 2-edged. 



9. CALAMINTHA. 2^0 Whorls axillary, few- GC-flowered. Calyx tubular or sliglitly 



flattened at upper surface. Corolla-tube straight. 

 IG. MELISSA. 2|[ Cymes axillary, few-flowered. Calyx slightly flattened at upper sur- 

 face. Corolla-tube recurved-ascendiug. 

 Tribe III. lUONARBEiE, Perfect stamens 2, anterior. 



* Cells of anther with a long connective. 



11. SALVIA. 2^ "5 Connective astride the tllament. Inflorescence whorled. 



(Fig. 276, gy. 



12. IvOSMAPvINU.?- ^ Connective coutinuou.s with the lilament. Filament with a small, 



reflexed tooth below middle. Inflorescence in axillary racemes. 



* * Anther-tells with a short connective, 



13 ZIZYPHUIIA. 2f ^ Sterile filaments with 2, empty anther-cells or 0. 



Tribe IV. AEPETJK.E. Perfect stamens 4, under the upper lip, the posterior pair 

 longer. Anther-cells divaricating. Calyx generally 15-nerved. 



14. NEPETA. 2t Upper lip of corolla flat. 



15. LALLEMANTIA. @ Upper lip of corolla concave, with two folds within jiaral- 



lel with margin. 



Tribe V. STA€HA'I>E^H, Perfect stamens 4, under the upper lip, the anterior 

 pair longer, or all enclosed in the tube. Calyx 5-10-nerved. Iifutlets dry. 



* Fruiting calyx closed by its incumbent lips. 

 IC. SCUTELLARIA. 2f Calyx-lips entire, the upper furnished with a scale. (Fig. 270, c, d). 



17. BRUCELLA. 2^ Upper calyx-lip 3-toothed, lower bifid. 



* * Fruiting calyx open. Stainens and style included in corolla-tube. 



18. SIDEEITIS. 2f Calyx with 5, usually spiny teeth ; the floral leaves in the annual 



species similar to the others, spreading or reflexed, in the perennial difier- 

 ent, forming an involucre to the whorls. 



19. MAEPvUBIUM. 2f Calyx with 5-10, spinulous, mucronate or muticous teeth ; 



the floral leaves conformed, spreading or reflexed. 

 * * * Fruiting calyx open. Stamens more or less exsertedfrom tube. 



20. STACJIYS. If 5 Calyx with equal or oblique, 5-toothed mouth. Outlets round- 



ed at lip. 



