Key to Arecaceae
View taxon page for Arecaceae
Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.
1. Leaf segments loosely arching to drooping, tent-like,
margins folded downward;
petioles Leaf stalk, connecting leaf blade to stem; sometimes more or less indistinct.
generally unarmed, bases not persisting
..... [SYAGRUS] 1' Leaf segments stiffly
spreading Oriented more or less perpendicularly to the axis of attachment; often, more or less horizontal.
, V-shaped, margins folded upward; petioles generally
armed, bases persisting on trunk
2. Leaf
blade Expanded portion of a leaf, petal, or other structure, generally flat but sometimes rolled, cylindric, wavy, or cupped.
pinnate Feather-like; pertaining to veins, lobes, leaflets, or other structures arranged in two dimensions (i.e., in one plane) along either side of an axis; a leaf is odd-pinnate if there is a terminal leaflet, even-pinnate if there is not, and either odd- or even-pinnate may be 1-pinnate (blade divided into primary leaflets), 2-pinnate (primary leaflets divided into secondary leaflets), 3-pinnate (secondary leaflets divided into tertiary leaflets), etc.
, elongate; petioles not split at base;
dioecious ..... PHOENIX 2' Leaf blade ±
palmate More than two structures or parts (e.g., veins, lobes, or leaflets) radiating from a common point in two dimensions (i.e., in one plane).
, rounded; petioles split at base; flower
bisexual Both male and female reproductive parts occurring and functional in the same plant or structure (e.g., flower, spikelet, inflorescence).
..... WASHINGTONIA
Please use this Google Form for Contact/Feedback
Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, https://ucjeps.berkeley.edu/eflora/ [accessed on ]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.