Glossary Details – Lecythidaceae

Glossary Details:

Title: Placentation of Allantoma lineata. Photo by C. Carollo.

Description: Cat ear-shaped locule of Allantoma lineata based on Freitas 521 from Amazonas, Brazil. Note that the locules are longer than wide and that the upper left hand angle is acute. This species has a columnar type of placentation which means that the ovules arise from placental tissue that arises from most of the length of a more-or-less evenly expanded lower septum. The upper septum of this species develops into the tack-shaped columella of the fruit of this species.

Term:

Lower/upper septum articulation

Definition:

A joint between the lower septum and the upper section as seen in a longitudinal section of the ovary.

Notes:

The lower/upper septum articulation is used to describe some aspects of the placentation of neotropical Lecythidaceae.

Related Terms:

Lower/upper septum