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| ** Glossary ** | ||||
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Lobe |
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| The
term
"lobe"
is
used
in
several
contexts.
(1) as an extension of an edge of a leaf. Lobes are typically much larger and more prominent than teeth. The gap between two lobes is called a "sinus". Lobes may have rounded (blunt) tips, or they may have sharp-pointed tips. |
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Figure A. Illustration of the concept of leaf lobes. White oak (Quercus alba) |
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(2) as the unfused portion of a "petal" of a flower (floret) for those flowers in which all the petals are partially fused to form a bell- or vase-shaped corolla. |
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Figure
B.
Illustration
of
the
concept
of
flower
lobes. |
| (3) as a swelling at the base of a fern leaflet. |
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Figure
C.
Lobes
at
base
of
leaflets
of
Christmas
fern. (Polystichum acrostichoides) |
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| Images and text copyright Arieh Tal, 2017-2022. All rights reserved. |
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