rolla or veil of some of the genera is like that of Mosses, but usually bursts at the top. The barren flowers are unlike the organized stamens of the last-mentioned plants, being either undefined powdery heads, as in Jungermannia, see Hedwig's Theoria', t. 15, or of some peculiar conformation, as in Marchantia, Engl. Bot. t. 210, where they are imbedded in a disk like the seeds of Lichens, in a manner so contrary to all analogy, that botanists can scarcely agree which are the barren and which the fertile flowers of this genus. The four-valved capsule of Jungermannia, with the veil bursting at its summit to let the fruit-stalk pass, may be seen in Engl. Bot. t. 185, 186, which are both frondose species, like J. epiphylla, t. 771 whose calyx as well as corolla are evident; and t. 605—608, which have apparently distinct leaves, like Mosses. Anthoceros, t. 1537, 1538, is a curious genus of the Hepaticæ. Linnæus comprehended this Order under the following one, to which it is, most assuredly, far less akin than to the foregoing.
