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Botanical Glossary

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AbaxialAway from the axis; the lower surface of the leaf; dorsalg-dorsal-ventral.png
AbcissentFalling off or separating at a specific separation (abcission) layer, as in most deciduous plants
AbsentNo hypanthium present.
AcarpousNo carpels or carpellate whorl; no pistil
AccessoryBuds lateral to or above axillary buds.
Accessory BudBuds lateral to or above axillary buds; Accessory Organs - The calyx and corolla
Accessory fruitA fruit or group of fruits that ripen together and include some accessory tissue (i.e. structures no...
Accessory OrgansThe calyx and corolla.
Accessory parts of fruitsStructures consisting of, or derived from, floral parts other than the pistil, such as sepals, hypan...
AccrescentGrowing after flowering or bud development has occurred, as the sepals in Hypericum and bud scales i...
AccumbentReclinate with cotyledon edges against hypocotylg-accumbent.png
AceroseNeedle-shaped; sharp
AcheneA more or less small, dry fruit that does not split open at maturity (indehiscent), with a typically...g-achene.png
AchenecetumAn aggregation of achenes, as in Ranunculusg-achenecetum.png
AchlamydeousWithout perianth
AcicularVery long and slender, gradually tapering to a point, like a needle; needle-shaped. (Compare with aw...
Acicular LeafNeedle-like, long and slender; e.g., Pinus.
AciculateFinely marked as with pin pricks, fine lines usually randomly arranged
AcidicGenerally applied to soils and rocks having low levels of basic (base-cation) minerals, such as calc...
AcornA nut with a persistent, cup-like structure (cupule) attached at the base consisting of numerous par...
AcrocaulousWith terminal branches
Acrocidal CapsuleOne that dehisces through terminal slits, or fissures, as in Staphyleag-acrocidal-capsule.png
AcrodromousWith two or more primary or strongly developed secondary veins diverging at or above the base of the...
AcropetalDeveloping upward, toward apex
AcroramousLeaves terminal, near apex of branch
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