CLASSIFICATION 187 
Flower.—Zygomorphic, orange-coloured, complete, 
14 inches long. 
Calyz.—Gamosepalous, 5, inferior, hairy. 
Corolla.—Bilabiate, gamopetalous, .5 hypogynous, 
tube long and narrow. 
Androecitum.—4, didynamous, epipetalous. Anthers 
dorsifixed, introrse. 
Gynoecium.—2, syncarpous, superior, stigma 2-fid, 
style long, ovary 4 celled, placentation axile, 1 ovule in 
each cell. 
Fruit.—A4 nutlets. 
Pollination.—There is honey on a disc round the 
ovary which can only be reached by long-tongued in- 
sects owing to the length of the corolla tube. The 
stigma projects beyond the anthers and is therefore 
touched first by visiting insects; the 2-lipped corolla 
with the stamens closely pressed against the upper lip 
ensures that the insect will touch them on its way to 
the honey. 
Other Genera.—Salvia, a large genus of 500 species, 
many of which are extensively cultivated for their or- 
namental flowers, has a curious lever-mechanism for 
pollination (see Chapter VI). One species is the herb 
known as Sage. Thymus (Thyme), Mentha (Mint, 
Peppermint), Origanum (Marjoram) are all well-known 
herbs used for flavouring, etc. Lavandula (the 
Lavender), Rosmarinus (Rosemary), and Pogostemon 
(Patchouly) all yield oils used in perfumery. 
157. N. O. Solanaceae. —General Characters.—Plants, 
herbs and shrubs, some climbers. Flowers solitary or 
in cymes, usually regular. Calyx 5, persistent. Corolla 
