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Leaf morphology

Illustration of terms applying to leaf shape, arrangement, margin, and venation

Items in the glossary should be listed lower-case with a Heading three tag ===like this=== so that they can be referenced using the G template. {{G}} takes one, unnamed parameter to create a link to the desired heading on this page. For example {{G|rhizome}} creates the following code [[Glossary#rhizome]] which creates a link like this rhizome.


AEdit

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acicularEdit

needle-shaped

acuminateEdit

tapering to a long point

alternateEdit

leaves arranged alternately, coming from nodes on opposite sides of the stem, with one leaf per node

arcuateEdit

with secondary veins bending toward the apex

aristateEdit

with a spine-like tip

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BEdit

basal rosetteEdit

A circular arrangement of leaves growing out of the ground as if not having any stem. Often seen in many perennial perennial or biannual plants whose upper foliage dies back with the remaining vegetation protecting the plant. (see also rosette)

bipinnateEdit

pinnate but with the leaflets also pinnate

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CEdit

ciliateEdit

with fine hairs

cordateEdit

heart-shaped with the stem in the cleft of the heart (see also obcordate)

crenateEdit

with rounded teeth

cross-venualteEdit

with small veins connecting secondary veins

cuneateEdit

wedge-shaped, acute at base

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DEdit

deltoidEdit

triangular

dentateEdit

with symmetrical teeth

denticulateEdit

finely dentate

dichotomousEdit

having veins branching symmetrically in pairs

digitateEdit

with finger-like lobes

doubly serrateEdit

serrate with sub-teeth

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EEdit

ellipticEdit

oval-shaped, small or no point

entireEdit

even and smooth throughout, with no lobes or teeth

even pinnateEdit

pinnately compound leaf with leaflets in rows, ending with two leaves at the tip

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FEdit

falcateEdit

hooked or sickle-shaped

flabellateEdit

fan-shaped

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HEdit

hastateEdit

triangular with basal lobes

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LEdit

lance-shapedEdit

see lanceolate

lanceolateEdit

Long, pointed at both ends, wider in the middle (see oblanceolate for opposite)

linearEdit

parallel margins, elongate

lobateEdit

indented margins but not to midline

lobedEdit

having deeply indented margins

longitudinalEdit

veins aligned mostly along leaf axis

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OEdit

obcordateEdit

Heart-shaped, stem attaches to tapering point (see cordate for opposite)

oblanceolateEdit

long, lance-shaped with the top wider than the bottom (see lanceolate

obovateEdit

egg-shaped, narrow at base (see ovate for opposite)

obtuseEdit

bluntly tipped

odd pinnateEdit

pinnately compound leaf with leaflets in rows, ending with one leaf at the tip

oppositeEdit

growing in adjacent pairs, from the same node

orbicularEdit

circular

ovateEdit

egg-shaped, wide at base (see obovate for opposite)

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PEdit

palmateEdit

Hand-shaped. Regarding leaf margin: indicating lobes that create a hand shape. Regarding veins: with several primary veins diverging from a point to make a hand-like shape.

parallelEdit

veins arranged axially and not intersecting

pedateEdit

foot-shaped (not necessarily like a human foot)

peltateEdit

stem attached centrally

perfoliateEdit

stem seeming to pierce leafe

pinnateEdit

  • regarding veins: with secondary veins, paired oppositely off a mid-rib
  • regarding compound leaves: with secondary leaves or leafstalks growing opposite off a main stalk

pinnatisectEdit

deep, opposite lobing

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REdit

reniformEdit

kidney-shaped

reticulateEdit

smaller veins forming a network

rhizomeEdit

A perennial underground stem usually growing horizontally and sending out roots and shoots from its nodes. An under-ground runner, sometimes called creeping rootstalks or merely rootstalks.

rhomboidEdit

diamond-shaped

rosetteEdit

leaves in tight, circular rings (see also basal rosette

rotateEdit

in peltate leaves, with veins radiating

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SEdit

serrateEdit

toothed with teeth pointing forward

serrulateEdit

finely serrated

sinuateEdit

with wave-like indentations

spatualteEdit

spoon-shaped

spear-shapedEdit

pointed, barbed at base

spinyEdit

with sharp, stiff points

stolonEdit

A slender, prostrate or trailing stem, producing roots and sometimes erect shoots at its nodes. An above-ground runner.

subulateEdit

tapering point, awl-shaped

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TEdit

ternateEdit

see trifolate

trifoliateEdit

leaflets in threes

tripinnateEdit

leaflets also pinnate

truncateEdit

squared off at apex

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UEdit

undulateEdit

widely wavy

unifoliateEdit

having a single leaf

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WEdit

whorlEdit

Three or more leaves or branches or pedicels arising from the same node

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