Page:An introduction to physiological and systematical botany (1st edition).djvu/176
SITUATION AND POSITION OF LEAVES.
Quaterna, quina, &c. when 4, 5, or more are so situated, as in various species of Heath, Erica.
Verticillata, whorled, is used to express several leaves growing in a circle round the stem, without a reference to their precise number, as in Asperula cynanchica, Engl. Bot. t. 33, and odorata, t. 755, which with the genus Galium, and some others, are for this reason called stellatæ, star-leaved plants. Whorled leaves are also found in Hippuris vulgaris, t. 763, and many besides.
Disticha, two-ranked, spreading in two directions, and yet not regularly op-