Page:An introduction to physiological and systematical botany (1st edition).djvu/178

 148 Incurva, or inflexa, curved inward, as Erica empetrifolia, t. 447.

Obliqua, twisted, so that one part of each leaf is vertical, the other horizontal, as Pritiliaria obliqua, t. 857, and some of the large Proteæ.

Resupinata, reversed, when the upper surface is turned downward, as Pharus latifolius, Browne's Jamaica, t. 38. ''Linn. Mss., and Alstrœmeria pelegrina, Curt. Mag. t.'' 139.

Depressa, radical leaves pressed close to the ground, as ''Plantago media, Engl. Bot. t. 1559, and P. Coronopus, t.'' 892. The same term applied to stem-leaves, expresses their shape only, as being vertically flattened, in opposition to compressa.

Natantia, floating, on the surface of the water, as Nymphæa lutea, t. 159, and alba, t. 160, also Potamogeton nutans, and many water plants.

Demersa, immersa, or submersa, plunged under water, as Potamogeton perfoliatum, t. 168, Hottonia palustris, t. 364, Lobelia Dortmanna, t. 140, and the