GENERA Oil FAMILIES. 367 



17. G-entianaceous Plants. GENTIANACE^. 



(41) Gentiana calyx 4-5-cleft ; corolla funnel- or salver-shaped, 



with a 4-5-cleft limb. 



18. Labiate Plants. LABIATE. 



(42) Mentha calyx equal, five-toothed ; corolla with a short 



tube, four-cleft, nearly regular ; stamens four, equal, erect. 



(43) Lamium calyx bell-shaped, five-toothed ; corolla-tube en- 



larged at the throat, the upper lip erect, arched or concave, 

 the lower spreading with a broad middle lobe, and two 

 minute lateral ones ; stamens four, the two lower longest. 



19. Chenopodiaceous Plants. CHENOPODIACE.E. 



(44) Chenopodium perianth 3-5-parted, persistent, unaltered ; 



stamens five, springing from the receptacle ; stigmas 2-3. 



20. Orchidaceous Plants. ORCHIDACE^E. 



(45) Spiranthes sepals coloured, and with the petals converg- 



ing, parallel with the lip ; lip shovel-shaped, unguiculate, 

 with two fleshy projections at the base ; column club- 

 shaped, with two teeth at the apex. 



21. Liliaceous Plants. LILIACE.E. 



(46) Scilla perianth-segments spreading deciduous; filaments 



filiform, smooth, inserted into the base of the perianth. 



22. Melanthaceous Plants. MELANTHACE.E. 



(47) Colchicum perianth with a long tube, and a campanulate 



six-parted limb ; stamens inserted in the orifice of the 

 tube ; capsules three, inflated, erect, united at the base, 

 many-seeded. 



