| We have found two species, both belonging to the genus
Nilssonia. There is one more species known from Bayreuth:
Pseudoctenis prossii. |
Nilssonia polymorpha  is the
most common species. The leaves are very differerent in size, but they have
in common that the side-leaflets are standing close together. Often there
is no space or very little space between the leaflets and occasionally they
are grown together. Furthermore they are mostly somewhat convex and not
acuminate. The leaf as a whole is very elongated (linear). The axes of the leaves are firm.
|
 Nilssonia
acuminata has acuminate side leaflets, which causes a V-shaped space between these leaflets. The leaflets are also often more elongated than in the preceding species. The leaf as a whole is therefore less linear. |
 Pseudoctenis prossii This plant was described only recently in 1998. The leaf as a whole is large and simply pinnate. The side leaflets are attached to the side of the thick axis and they are decurrent at the lower side. They are about 1 cm wide and 12 cm long. At the base of the frond they are perpendicular to the axis, to the upper side of the frond the angle is getting smaller. This plant is rather rare. |