372 LABIATE. (MINT FAMILY.) 



serted on the tube of the corolla, diandrous or didynamous. Ovary 

 4-cleft or 4-parted, the lobes surrounding the base of the single style. 

 Ovule solitary, erect, anatropous. Fruit of 1 - 4 one-seeded nutlets. 

 Albumen scarce or none. Embryo straight or (in Scutellaria) curved. 

 Radicle short, inferior. Plants commonly dotted with minute 

 glands, which are filled with an aromatic volatile oil. 



Synopsis. 



TRIBE I. OCIMOIDE^E. Stamens 4, didynamous ; the lower pair longer, reclining 

 ou the lower lobe of the corolla. Anthers 2-celled. Nutlets smooth, distinct. 



1. OCIMUM. Upper lobe of the calyx broad, decurrent. Lobes of the corolla nearly 



equal. 



2. HYPTIS. Calyx teeth nearly equal. Lowest lobe of the corolla longest, saccate, bent 



downward. 



TRIBB II. SATUREIE^E. Stamens 2 or 4, straight and spreading, or connivent 

 under the upper lip ; the upper pair shorter, or abortive. Anthers 2-celled. Nutlets 

 smooth, distinct. 



* Corolla lobes nearly equal. Stamens distant. 



3. MENTHA. Fertile stamens 4. Whorls spiked. Nutlets obtuse. 



4. LYCOPUS. Fertile stamens 2. Whorls axillary. Nutlets truncate. 



* * Corolla 2-lipped. Stamens straight, distant, spreading. 



5. CUNILA. Stamens 2. Calyx equally 5-toothed, hairy in the throat. 



6. PYCNANTHEMUM. Stamens 4. Calyx 2-lipped or 5-toothed, naked in the throat 



7. COLLINSONIA. Stamens 2 or 4. Calyx 2-lipped, the upper lip truncate, 3-toothed. 



Corolla fimbriate. 



* * * Corolla 2-lipped. Stamens ascending and spreading above, or connivent under the 



upper lip. 



+- Fertile stamens 2 ; the two sterile ones small. 



8. HEDEOMA. Calyx 13-nerved, 2-lipped ; the lower lip hispid. 



H- -i- Fertile stamens 4. Calyx 13-nerved. 



9. SATUREIA. Flowers capitate : low shrub. 



10. MICROMERIA. Calyx teeth nearly equal. Flowers solitary. Low herbs. 



11. CALAMINTHA. Calyx 2-lipped. Flowers in cymes. Anthers awnless. Chiefly shrubs. 



12. CONRADINA. Corolla ringent, bent backwards. Flowers mostly axillary and single. 



13. CERANTHERA. Calyx 2-lipped. Anther cells awned. Branching annuals. 



14. MELISSA. Calyx tubular-bell-shaped, flattened on the upper side. Tube of the corolla 



curved upward. 



TRIBE III. MONARDEyE. Stamens 2, ascending and parallel. Anthers 1-celled, or 

 with 2 confluent cells. Calyx and corolla 2-lipped. Nutlets smooth, distinct. 



15. SALVIA. Connective of the anther elongated, oblique ; the upper cell fertile ; the lower 



abortive or wanting. 



16. MONARDA. Anther 2-celled, the cells confluent. Calyx teeth equal. 



17. BLEPHILIA. Anther 2-celled, the cells confluent. Calyx 2-lipped ; the upper teeth 



awned. 



TRIBE IV. NEPETE^E. Stamens 4, the upper pair longer. Nutlets smooth, distinct. 



18. LOPHANTHUS. Upper stamens curving downward ; the lower ascending. Anther 



cells parallel. 



19. NEPETA. Stamens all ascending. Anther cells diverging. 



20. CEDRONELLA. Stamens all ascending. Anther cells parallel. 



