Flora of North America Glossary

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Term Synonyms Category Limitation Definition
ascidiate 1 = pitcher-bladed architecture leaf Having an ascidiform (pitcher-shaped) blade; esp. in Nepenthaceae, Sarraceniaceae.
ascidiate 2 = pitcher-leaved architecture plant Bearing ascidiate (pitcher-bladed) leaves; esp. in Nepenthaceae, Sarraceniaceae.
ascidiform = pitcher-shaped solid shape Having a more or less tubular, radially or bilaterally symmetrical body closed at the base and broadening toward a more or less open apex sometimes lidded or overarched by a prolongation of one side; like a pitcher.
ascidium pl. ascidia = pitcher, pitcher-blade STRUCTURE An ascidiform (pitcher-shaped) leaf blade, sometimes operculate (lidded), usually carnivorous; esp. in Nepenthaceae, Sarraceniaceae.
asepalous architecture flower, perianth Lacking sepals.
aseptate architecture Lacking internal walls or partitions (septae).
asexual = apomictic; > agamospermous, apogamous, aposporous, vegetative reproduction taxon, plant Producing new plants by means not involving meiosis or fertilization.
assurgent = ascending, upcurved orientation lateral structure Spreading at the base and then curving upward or forward, the distal portion more or less parallel to the bearing structure.
astomatiferous = non-stomate-bearing architecture Lacking stomates in the epidermis.
asymmetric(al) 1 architecture Not divisible into essentially equal halves along any line or plane.
asymmetric(al) 1 plane shape Not divisible into essentially equal halves along any line or plane.
asymmetric(al) 1 solid shape Not divisible into essentially equal halves along any line or plane.
asymmetric(al) 2 architecture flower Having the perianth members in whorls that are irregular and/or unequal in number of members.
atropous = orthotropous orientation ovule Having the (straight) ovule sessile or funiculate and divaricate, the micropyle facing away from the ovary wall (placenta).
attenuate 1 = concave-tapered base Gradually diminishing in width or diameter toward the proximal end, the sides longitudinally concave. Corresponds with acuminate for apex shape.
attenuate 2 = tapered plane shape Gradually diminishing in width from one end to the other.
attenuate 2 = tapered solid shape Gradually diminishing in breadth or diameter from one end to the other.
auricle = ear STRUCTURE A small, rounded, lateral lobe at the base of a laminar structure, lying in more or less the same plane as the remainder of the lamina.
auriculate = eared base laminar structure Having two small, rounded, lateral lobes, one to either side, that lie in more or less the same plane as the remainder of the lamina.
auriform = ear-shaped solid shape Resembling a mammalian outer ear.
autogamous = automictic, idiogamous, self-fertilizing, selfing; > geitonogamous reproduction taxon Having fertilization regularly involving gametes derived from the same plant.
automictic = autogamous, idiogamous, self-fertilizing, selfing; > geitonogamous, reproduction taxon Having fertilization regularly involving gametes derived from the same plant.
autotrophic nutrition plant Independent of other organisms for its nourishment, itself synthesizing all essential substances not directly available from the non-living environment.
awl-shaped 1 = subulate plane shape Narrowly triangular or truncate-triangular and broadest at the base; like the outline of the lateral face of an awl.
awl-shaped 2 = subulate solid shape Slender, essentially terete, and straight, gradually attenuate from a relatively narrow base to a very narrow, blunt to angular apex.
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