Around the cloacal opening and extending onto the tail lobes, the cuticle is structured into barely visible polygonal areoles
Greenish-red, club-shaped fruits with wooly areoles
and bristly spines adorn the flowers.
Both taxa have goblet-shaped podetia covered with coarse areoles
and produce fumarprotocetraric acid.
by having rhizome scales that are relatively smaller, moderately dense, with dark brown central portions and narrower pale margins; blades that are 1-pinnate basally to pinnatisect distally and relative narrower; pinnae that are sessile and deltate to deltate-lanceolate; fewer series of areoles
and sori, spores that are whitish, ellipsoidal, most well developed and a few collapsed.
A fabric of finer veins between the main veins forms an irregular reticulum of polygonal areoles
Apex of sterile leaf blades rounded; veins of sterile blades forming areoles
without secondary areoles
, but with included free vienlets; fresh plants not malodorous; plants not usually associated with limestone outcroppings.
subcrenata by there being two or more free veins in costal areoles
on the higher order venation patterns, the areoles
, and the ultimate
range from imperfect to well developed and are
The surface of Dicksonia sellowiana spores are granulated or reticulate with strands of fused spheres surrounding somewhat depressed areoles
as observed by Tryon and Tryon (1982).
They had radially elongated, irregular, shared areoles
lacking freely ending veinlets.
The fern genus Phlebodium is traditionally described as having a row of costal areoles
lacking included veins, with the sori located in extra-costal areoles
and each sorus served by two veinlets.