Page:An introduction to physiological and systematical botany (1st edition).djvu/194

 164 Glandulosum, glandular, as Hypericum montanum, t. 371, and the Bay-leaved Willow, Salix pentandra.

Revolutum, revolute, when the margin is turned or rolled backwards, as Andromeda polifolia, t. 713, and ''Tetratheca glandulosa, Exot. Bot. t.'' 21.

Linnæus seems originally to have applied this term to the rolling of the whole leaf backwards, as in ''Solidago Virgaupea, Engl. Bot. t. 301, meaning to use the expression margine revolutum when the margin was intended; but this latter case being extremely frequent and the other very rare, he fell into the practice of using revolutum'' simply for the margin.

Involutum, involute, the reverse of the preceding, as in Pinguicula, t. 70 and 145.

Conduplicatum, folded, when the margins are brought together in a parallel direction, as in ''Roscoea purpurea, Exot. Bot. t.'' 108.

7. Terms expressive of different kinds of surface, applying equally to the leaf and to the stem, have been already explained,