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A pseudo-reticulate venation that is actually a highly modified penniparallel one is an autapomorphy of some Melanthiaceae, which are monocots; e.g., Paris quadrifolia (True-lover's Knot). In leaves with reticulate venation, veins form a scaffolding matrix imparting mechanical rigidity to leaves. [34]
The leaves are 8–10 centimetres (3.1–3.9 in) long, [5] petiolated, alternate, tough, leathery, and heart-shaped, with toothed and spiny margins. It is a monocot with reticulate venation. The midrib of the underside of the leaf is also provided with spines. The flowers, very fragrant, are small, yellowish or greenish, gathered in axillary ...
The leaves of Glossopteris are characterized by their distinctive tongue shape that gives them their name, as well as their reticulate venation. The leaves were either widely spaced on long stems, or were densely helically arranged on short shoots. Glossopteris bearing plants grew as woody, seed-bearing trees and shrubs.
When the leaves are dried along the secondary veins, the leaves become disfigured having a chartaceous characteristic that is a flat paper trait. The leaves are also narrower in shape. The venation in the leaves run in a reticulate venation where the midrib, which gives support to the leaf, and secondary (and even tertiary) veins are seen.
Members of this family can be herbaceous to "woody" vines. They grow from their rhizomes and are often armed with prickles on the stems and/or leaves. Leaves are alternate and simple; and entire to spinose-serrate. Some members of this family have coriaceous (leathery) leaves. Venation of the leaves may be palmate to reticulate.
The specific epithet refers to the reticulate venation (network-like pattern of the veins) on the leaves. [3] ... oval leaves are usually 40–80 mm long and 20–40 ...
The shape of the leaf is aristate. The margin of the leaf is undulate. The venation of the leaf is reticulate in the variegated form. Graptophyllum pictum is similar in appearance to Pseuderanthemum carruthersii. [1] A group of plants of this species in the Andromeda Botanic Gardens, Barbados