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Botanical Glossary

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AnnulusThick-walled ring of cells on the sporangiumg-sporangium.png
AnomalicidalOne that dehisces irregularly, as in Ammanniag-anomalicidal.png
AnteriorAnterior Lobes - The lobes away from axis, toward the subtending bract, abaxial lobes; Anterior Ridg...g-anterior-posterior.png
Anterior LobesThe lobes away from axis, toward the subtending bract; abaxial lobes.g-anterior-posterior.png
Anterior RidgesThe lines, grooves, ridges in or on the dorsal side, abaxial, within the perianth.g-anterior-posterior.png
AntherThe pollen-producing portion of the stamen typically borne at the tip of a stalk or filament.g-androgynophore.png
AntheridiumThe male sex organ producing the sperm
AnthesisTime of flowering; opening of flower with parts available for pollination
AnthocarpousHaving a body of combined floral and fruit parts, as in multiple fruits
AnthophytaWithin the Plant Kingdom, the division of flowering plants.
AnthotaxisArrangement of sporophylls, primarily reproductive in function
AnthropophilyPollinated by man
AntipetalousOpposite the petalsg-antipetalous.png
AntisepalousOpposite the sepalsg-antisepalous.png
AntitropousWith radicle pointing away from hilum
AntrorseBent or directed upward
ApetalousNo petals or corolla
ApexThe portion of a plant structure (such as a leaf, bud, stem, etc.) farthest from its point of attach...
Apex obcordateLobe rounded; sinus depth 1/8-1/4 distance to midpoint of blade; margins convex and/or straight
AphyllopodicWithout blade-bearing leaves at base of plant
AphyllousWithout leaves, no whorls of leaves
ApicalAttachment of ovules at the top or apex of the ovary. (Compare with basal placentation.)
ApiculateEnding abruptly in a small, slender, point that is not stiff and often slightly curved. (Compare wit...g-apiculate.png
ApocarpousWith carpels separateg-apocarpous.png
ApogamyProducing sporophytes from a gametophyte without fertilization
ApopetalousWith petals distinct, not fused. (Compare with sympetalous.)
ApophysisThe outer portion of a cone scale which is exposed when the cone is closed.
AposepalousWith sepals distinct, not fused. (Compare with synsepalous.)
AposporyProducing gametophytes directly from a sporophyte without producing spores
ApostemonousWith separate stamens
AppendicularTypical stamen with a variously-shaped or modified, protruding connective, as in Violag-appendicular.png
ApplanateFlat, without vertical curves or bends
appositionLeader displacement as a short-shoot. Usually a single lateral becomes dominant; e.g., Terminalia.
AppressedPressed upwardly close or flat against the bearing structure, thus more or less parallel to it. (Com...
AquaticLiving in water.
Aquatic-emergentGrowing in water with stem and leaves extending above the surface. (Compare with aquatic-floating an...
Aquatic-floatingGrowing in water with leaves floating on the surface. (Compare with aquatic-emergent and aquatic-sub...
Aquatic-submergedGrowing in water with stem and leaves beneath the surface. (Compare with aquatic-emergent and aquati...
ArachnoidWith fairly sparse, fine, white, loosely tangled hairs; cobwebby.g-arachnoid.png
ArborescentTree-like in appearance and size
ArchegoniumThe female sex organ producing the egg
ArcuateCurved like a crescent, can be downward or upward
AreolateDivided into many angular or squarish spaces
AreolesThe spaces formed by a vein network
ArhizousWithout roots, no whorls of roots
ArilOutgrowth of funiculus, raphe, or integuments; or fleshy integuments or seed coat, a sarcotesta at b...
ArillateGeneral term for an outgrowth from the funiculus, seed coat or chalaza; or a fleshy seed coat
AristateBearing a prolonged, slender, stiff, usually straight tip; awned or bristled. (Compare with apiculat...g-aristate.png
ArmatureAny kind of sharp defense such as thorns, spines, or prickles.
ArmedBearing any kind of sharp defense such as thorns, spines, or prickles.
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