High, with a rounded head of foliage, and greyish-green 3 to 7-lobed palmate leaves, somewhat resembling the leaves of the castor-oil plant in shape and size.
Polyphyllus, 3 ft., forms noble tufts of palmate leaves, and long spikes of bluishpurple or white flowers in June and July; L.
- Colonial branching or palmate perforate corals, with abundant trabecular coenenchyme.
The recently discovered species, Sphenophyllum fertile, while resembling Bowmanites Romeri in its peltate, bisporangiate sporangiophores, is peculiar in the fact that both dorsal and ventral lobes of the sporophyll were fertile, dividing in a palmate manner into several branches, each of which constitutes a sporangiophore.
On account of its very large beautiful palmate-peltate leaves, which sometimes measure as much as 2 ft.
Taking place in a simple leaf with palmate or radiating venation, give origin to lobed, cleft and partite forms.
Adiantum; the lowest vein in each half of the lamina follows a course parallel to the edge, and gives off numerous branches, which fork repeatedly as they spread in a palmate manner towards the leaf margin.