640 ORDER 89. LABIAT^E. 



(rarely regular), upper lip 2-cleft or entire, arched or almost wanting, overlapping 

 in bud the lower 3-cleft, usually larger lip. Stamens 4, didynamous, or only 2. 

 Anthers 2-celled, cells often separated. Ovary free, deeply 4-lobed, the single style 

 arising from the base of the lobes. Fruit composed of 4, or by abortion fewer, sep- 

 arable, 1 -seeded nuts or achenia. 



Illustrations in Figs. 75, 86, 117, 325, 273, 351. 



Genera 125, species 2350, chiefly natives of temperate regions, being most abundant between 

 latitudes 40 and 50 of the northern hemisphere. 



Properties. This well known family is universally pervaded by an aromatic, volatile oil, and 

 a bitter principle ; the former rendering them eminently tonic, cordial, and stomachic ; the lat- 

 ter, where it prevails, febrifugal. The Pennyroyal, Lavender, Sftffe, Hoar-hound, Thyme, 

 Spearmint, Peppermint, Ilorsemint, Rosemary, &c., &c., plants whose qualities are too well 

 known to require particular mention here, are all members of this useful family. Not one spe- 

 cies is poisonous or even suspicious. 



TRIBES AND GENERA. 

 Stamens 2, perfect, ascending beneath the galea ; anthers 1-celled. (Tribe IV.) 



exserted, distant ; anthers 2-celled (d). 



Stamens 4, perfect, all declined towards the lower lip. (Tribe I.) 

 erect, or ascending towards the upper lip (2). 

 2 Stamens of equal length, corolla almost regular, 4 to 5-lobed (*c). 



2 Stamens, the upper pair longer than the lower (outer) and calyx 13 to 15-veined. (Tribe V.) 

 2 Stamens, the lower pair longer than the upper (interior) pair (3). 

 3 Stamens divergent, apart, mostly straight and exserted (e). 

 3 Stamens parallel, ascending and long-exserted from the upper side (b). 

 3 Stamens parallel, ascending in pairs beneath the upper lip (4). 

 4 Calyx 13-veined, 5-toothed, and somewhat 2-lipped (f). 

 4 Calyx 5 to 10-veined, or irregularly netted (5). 



5 Calyx strongly 2-lipped, upper lip truncate, closed in fruit (h). 

 5 Calyx not 2-lipped, 3 or 4-lobed, open in fruit (k). 

 5 Calyx subequally 5-toothed, teeth not spinescent (m). 

 5 Calyx snbequally 5-toothed, teeth spinescent (n). 

 5 Calyx unequally 8 to 10-toothed (o). 



I. OCIMOIDEJ5. Corolla upper lip 4-lobed, lower entire, flattish OCIMUM. 1 



Corolla upper lip 4-lobed, lower saccate, deflexed HYPTIS. 2 



Corolla upper lip 2-lobed, lower 3-lobed LAVANDULA. 3 



II. AJUGOIDE^E. b Stamens exserted through a fissure in the tube TEUCRICM. 4 



b Stamens very long, involute, arching the corolla TRICUOSTEMMA. 5 



*C Corolla limb equally 5-lobed. Stamens short ISANTUCS. 6 



III. S ATUREJE^E. (Stamens diverging or ascending, 2-celled. Cor. lobes flattish, spreading.) 



V. *o Corolla limb 4-lobed, upper lobe broadest MENTHA. 7 



d Corolla ntarly regular, 4-lobed.* alyx naked in the throat LYCOPUS. 8 



d Corolla bilabiate, cyanic, throat naked. Stamens straight CITNILA. 9 



cyanic, throat naked. Stamens ascending HEDEOMA. 10 



yellow, throat with a hairy ring inside COLLINSONIA. 11 



e Calyx 15-veined. Stamens exserted, divergent HYSSOPUS. 1'2 



e Calyx 10-veined, the veins obscured by hairs. Cor. yellow, fringed COLLINSONIA. 11 



e Calyx 10 to 13-veined, throat naked. Stamens straight, divergent. . PYCNAXTHEMUM. 18 



Stamens ascending, anth. spurle.ss..SATpREjA. 14 

 Stamens ascending, anth. spurred.DiCERANDRA. 15 



throat hairy Bracts roundish, large ORIGANUM. 16 



Bracts narrow, minute THYMUS. 17 



f Tube of the corolla straight. Leaves small, subcrenate or entire CALAMINTHA. 18 



f Tube of the corolla curved upwards. Leaves large, coarse-crenate MELISSA. 19 



IV. MONARDEJE. Connectile long, transverse, distancing the anther cells SALVIA. 20 



Connectile continuous with fil. toothed at the juncture.. . .EOSMARINUS. 21 



Connectile inconspicuous. Calyx subequally toothed ... MONARDA. 22 



Calyx bilabiate, aristate BLEPIIYLLIA. 23 



V. NEPETEJE. Stamens distant, exserted. Flowers in terminal spikes LOPHANTHUS. 24 



Stamens all ascending. Anther cells divergent, much NEPETA. 25 



Anther cells divergent, little. . .DRACOCEPHAI.UM. 26 

 Anther cells parallel. Fls. large.. .CEDRONELLA. 27 



VI. STACIIYDEjE. (Stamens parallel, ascending. Cor. upper lip galeate. Cal. 5 to 10-veined.) 

 b. Calyx lips toothed, upper 3 teeth minute, lower 2 large BRUNELLA. 28 



