Glossary
Glossary
Glossary
There are currently 54 names in this directory beginning with the letter A.
Actinomorphic
Regular of or relating to a flower that can be divided into equal halves along any diameter, radially symmetrical
Acuminate
Tapering gradually or abruptly from inwardly curved, somewhat concave sides, into a narrow point
Acuminate Apex
A leaf tip that starts out straight or convex, then changes to concave and gradually comes to a point. The angle should be between 60 degrees and 90 degrees. If the angle is greater than 90 degrees, it is a short acuminate apex, and if the angle is less than 60 degrees, it is a long acuminate apex
Acute
Sharply pointed with the sides straight or somewhat convex, an angle of less than 90 degrees with two almost straight lines, as in a blade base Ex. B. rubronervata View Illustration
Acute Apex
A leaf apex (tip) that is shaped less than 90 degrees and follows a reasonable straight line; if the apex has a point it is a sharply acute apex and if the tip is rounded off, it is a roundly acute apex
Adventitious
Growth Leaves or plant parts appearing in abnormal places, such as roots growing out of aerial stems, or leaves growing out of a flower stalk
Adventitious Roots
Roots arising from an organ other than the root, it can be from a stem or a leaf. They are especially numerous on underground stems, such as rhizomes, corms, and tubers, and make it possible to vegetatively propagate many plants from stem or leaf cuttings
Androecium
Reproductive portion of male flower composed of one or more stamens, all of the stamens in a flower, collectively, each stamen is made up of an anther and a filament; male element of a bisexual flower
View Illustration
Androecium, zygomorphic
When all stamen in an androecium are generally positioned in the same direction, resembling a bunch of bananas
Angulate
A leaf margin having noticeable angles, similar to a lobed leaf but the margin is very angular with various salient angles to the edge
Anther-connective
The tissue connecting the two cells of an anther, which in reality is a continuation of the filament
Apiculate
Tipped with a short sharp flexible point; ending abruptly in a small sharp point as on a leaf apex
Aristate
Terminated by a slender, often awn or bristle-like narrow appendage such as on an apex of a leaf
Asymmetric
Characteristic seen in many Begonia leaves, the leaf shape, if divided in half, is not identical or equal on both sides; lacks a plane of symmetry; irregular
Asymmetric decurrent
Of a blade base where the two lobes are not identical or equal on both sides, one is rounded with an angle between 90 and 180 degrees, and the other side has a slightly rounded edge and less than 90 degrees formed by the curved line Ex. B. guaduensis
Asymmetric decurrent and acute
Of a blade base where the two lobes are not equal, one side of the blade base makes a rounded angle less than 90 degrees, and the other side makes a rounded angle between 90 to 180 degrees Ex. B. isopterocarpa
Axil
Angle formed between any two organs, the upper angle between a lateral organ, such as a leafstalk and the stem that bears it
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