This genus differs from the last in its pinnate or bipinnate fronds and compound panicle of clustered spore-cases. There are six species, from temperate and tropical regions. The name is derived from 17 Botrychium 511 a cluster, the form of the inflorescence.

1. B. Lunaria, Moon wort. - Frond fleshy, about 4 or 6 inches high, pinnate, with lunate, crenate, or pinnatifid pinnae. A widely distributed plant, but not so frequent in Britain as its ally the Adder's Tongue.

The remaining orders of this division are scantily, if at all, represented in gardens, except under glass. We have several native species of the Lycopodiacece, five belonging to the genus Lycopodium, and one to Selaginella. There is also one hardy, or nearly hardy, Japanese species belonging to the latter genus, 8. involvens. It belongs to the section with dwarf rosulate flat fan-like branches. Of the Equisetacece, the very large Horsetail, Equisetum maximurti, syn. E. Telmateia, deserves mention, as it is a grand plant for introducing in damp rich soil, where it is not fully exposed to the sun. In favourable situations its barren stems rise to a height of 6 or 8 feet. The distinct manner of growth peculiar to this genus, in which the lateral branches are arranged in whorls one above the other from a sheathed jointed stem, is sufficient to entitle it to a place-in the gardens of the curious,