COROLLIFLOR^E. 319 



LABIATE. 



Coh. Lamiales, Benth. et Hook. 



Diac/nosis. Chiefly herbs, with square stems and opposite aro- 

 matic leaves ; flowers with a more or less 2-lipped, hypogynous 

 corolla, clidynamous or diandrous stamens ; deeply 4-lobed ovary, 

 the lobes surrounding the base of the single gynobasic style, and 

 forming, when ripe, 4 indehiscent 1-seeded achenes in the bottom 

 of the persistent calyx ; stigma bifid; seeds erect, with little or no 

 perisperm. 



Character. 



Thalamus flat or slightly elongated, often prolonged into a hypo- 

 gynous disk or series of glands. Calyx inferior, persistent, tu- 

 bular, 5-merous, with the odd sepal posterior; the limb regu- 

 larly 5- or 10-toothed, or irregular and bilabiate (fig. 418), 3- to 



Fig. 420. 



Fig. 419. 

 Fig. 418. 



Fig. 418. Calyx of Salvia. Tig. 419. Corolla of Salvia. 



Fig. 420. Corolla of Glechoma opened, showing the didynamous stamens. 



10-toothed. Corolla hypogynous, gamopetalous, bilabiate ; the 

 upper lip entire or divided, arched or almost suppressed; 

 the lower lip usually larger and 3-lobed (fig. 419). Stamens 

 springing from the corolla, 4, didynamous (fig. 420), or some- 

 times 2 ; anthers 2-celled or apparently 1-celled from the ap- 

 position of the cells at the apex, or with the filament or con- 

 nective bifurcate and bearing either 2 single cells or 1 perfect 

 cell and a sterile process. Ovary deeply 4-lobed, on a fleshy 

 disk, 4-celled, each cell with 1 erect ovule ; style simple, arising 

 from the bottom of the carpels ; stigma forked. Fruit composed 

 of 4, or, by abortion, 3, 2, or 1, dry, separable, 1-seeded por- 

 tions, surrounded by the persistent calyx ; seeds with little or no 

 perisperm ; cotyledons flat ; radicle inferior. 



