- abaxial, abaxial (not on leaves), under surface, abaxially, below
- abayado, baccate
- abolladura, dent
- abortivo, abortive
- abrazado, clasped
- abrazador, embracing
- abruptamente, abruptly
- abrupto, abrupt
- abscisión, abscission
- acanalado, canaliculate, channelled, furrowed, grooved
- acantilado, cliff
- acantocarpo, acanthocarpous
- acarpelado, acarpous
- acárpico, acarpous
- acarpo, acarpous
- acaule, acaulescent, acaulous
- accesoria (yema), supernumerary (bud)
- acéfalo, acephalous
- aceroso, acerose
- acetabulado, acetabuliform
- acetabuliforme, acetabuliform
- acíclico, acyclic
- acícula, acicula
- aciculado, aciculate
- acicular, acicular, needle-like, aciculiform
- acidófilo, acidophilous
- acinaciforme, acinaciform
- aclamídeo, achlamydeous
- acorazonado, heart-shaped
- acostillado, fluted, ribbed, costate
- acranto, acranthous
- acre, acrid
- acrescente, accrescent
- acródroma (nervadura), acrodromous (venation)
- acrógamo, acrogamous
- acromático, achromatic
- acrópeto, acropetal
- acroscópico, acroscopic
- acróscopo, acroscopic
- acrosticoide, acrostichoid
- actinódroma (nervadura), actinodromous (venation)
- actinomorfo, actinomorphic
- actinostela, actinostele
- actófilo, actophilous
- acuático, aquatic
- aculeado, aculeate, acanaceous
- aculeolado, aculeolate
- acumbente, accumbent
- acuminado, acuminate
- adaxial, adaxial (not on leaves), above, adaxially
- adelfia, adelphia
- adherente, adherent
- adnato, adnate
- adpreso, adpressed, appressed, applied
- adventicio, adventitious, adventive
- aerocaule, aerocaulous
- aerófilo, aerophilous
- aeróforo, aerophore
- afelpado, felted, pannose
- afilado, sharp
- afilo, aphyllous, leafless
- afi1ópodo, aphyllopodic
- aflebia, aphlebia
- afleboide, aphleboid
- aflechado, sagittate, sagittiform
- afloramiento, outcrop
- agalla, gall
- ágamo, agamous
- aglomerado, agglomerate, congested, conglomerate
- agrandado, enlarged
- agregado, agglomerate, conglomerate, aggregated, cluster, clustered, crowded
- agrupado, crowded, packed, aggregated, cluster, clustered
- agudo, acute
- aguijón, prickle
- aguijonoso, prickly
- aguja, needle
- ahorquillado, furcate
- ajedrezado, checkered, tessellated
- ala, wing
- alado, alate, winged
- alambrino, wiry
- alargado, elongate (-ed, -ing)
- alas, alae
- albumen, albumen
- albuminoso, albuminous, endospermous
- alesnado, awl-shaped
- aleznado, awl-shaped
- aloctono, exotic, allochthonous
- alogamia, allogamy
- a1ógamo, allogamous, xenogamous
- alopátrico, allopatric
- alotrópico, allotropic
- alpino, alpine
- alternipétalo, alternipetalous
- alternipinnado, alternately pinnate
- alternisépalo, alternisepalous
- alterno, alternate
- alveolado, alveolate
- amarillento, yellowish
- amarillo pálido, flavidulous
- amentáceo, amentaceous, amentate, amentiferous, catkinate
- amentiforme, amentaceous, amentate, amentiferous, catkinate
- amento, ament, catkin
- amorfo, amorphous
- amplectivo, amplective
- amplexicaule, amplexicaul, clasping
- ampolloso, blistered
- ámpula, ampulla
- ampuláceo, ampullaceous
- anadrómico, anadromic
- amádromo, anadromous
- anandro, anandrous, astemonous
- anantero, anandrous, astemonous
- anaranjado, orange, orangish
- anastomosado, anastomosing
- anátropo, anatropous
- ancipital, ancipital
- ancistroso, barbellate, ancistrous
- andino, Andean
- androceo, androecium
- androdioico, androdioecious
- andróforo, androphore
- andrógino, androgynous
- androginóforo, androgynophore
- andromonoico, andromonoecious
- andropetalario, andropetalous
- anemofilia, anemophily
- anemófilo, anemophilous
- aneuploide, aneuploid
- anficárpico, amphicarpous
- anfígeno, amphigenous
- anfiploide, amphidiploid
- anfisarca, amphisarca
- anfítropo, amphitropous
- angiocarpo, angiocarp
- angostada, narrowed
- angulado, angular, angulate
- anguloso, angular, angulate
- angustifolio, angustifoliate, leptophyllous
- anillado, ringed
- anillo, annulus
- anisocótilo, anisocotylous
- anisofilo, anisophyllous
- anisopétalo, anisopetalous
- anisosépalo, anisosepalous
- anisostémono, anisostemonous
- anomalicida, anomalicidal
- antártico, antartic
- antela, anthela
- antera, anther
- anteras con x tecas, anthers x-celled
- anteridio, antheridium
- anterífero, antheriferous
- anteriforme, antherode
- anterior, anterior
- anterozoide, sperm
- antesis, anthesis
- anticlinal, anticlinal
- Antillas, West Indies
- antipétalo, antepetalous, antipetalous, oppositipetalous
- antisépalo, antesepalous, antisepalous, oppositisepalous
- antocárpico, anthocarpous
- antocarpo, anthocarpo
- antropófilo, anthropohilous
- antrorso, antrorse
- anual, annual, yearly
- anular, annular, annulate, ringlike
- anuloso, ringed
- apareado, paired
- apéndice, appendage, appendix
- apendiculado, appendiculate
- apergaminado, pergamentaceous
- apétalo, apetalous
- apetalostémono, apetalostemonous
- apical, apical
- ápice, apex, tip
- ápice de la quilla, keel tip
- ápice punzante, pungent tip
- apiculado, apiculate
- apículo, apiculus
- aplanado, flat, planate, plane, applanate
- aplicado, adpressed, appressed, applied
- apocárpico, apocarpous, dialycarpous
- apófisis, apophysis
- apogamia, apogamy
- apogámico, apogamic
- apomíctico, apomict
- apomixis, apomixis
- aposporia, apospory
- apospórico, aposporic
- apostémono, apostemonous
- apótropo, apotropous
- Aprox., approximately
- áptero, apterous
- aquénico, achenial
- aquenio, achene
- aquenodio, achenecetum
- aquillado, keeled
- aracnoide, histoid
- aracnoideo, arachnoid
- árbol, tree
- arbolado, wooded
- arbóreo, arboreal
- arborescente, arborescent, tree-like
- arbustivo, shrubby
- arbusto, shrub
- área, territory
- arenícola, psammophilous
- aréola, areole
- areolado, areolate
- argénteo, silvery
- argilícola, argillophilous
- arilado, arillate
- arilo, aril
- arista, awn
- aristado, aristate, awned, awn, tipped
- armado, armed
- armado de púas, hamulate
- armadura, armature
- aromático, aromatic
- arqueado, arching, arcuate, bowed
- arquegonio, archegonium
- arrosetado, rosetted, rosulate
- arroyo, stream
- articulado, articulate, jointed
- arundináceo, arundinaceous
- arvense, weedy, arvensis
- asa, haft
- ascendente, ascending, assurgent
- ascidio, ascidium, pitcher
- asépalo, asepalous
- aseptado, aseptate
- asexual, agamous, asexual
- asimétrico, asymmetric
- áspero, asperous, harsh
- astilo, without style
- atactostela, atactostele
- atenuado, attenuate, tapering
- aterciopelado, velutinous, velvety
- atrapamoscas, flytrap
- aurícula, auricle
- auriculado, auriculate
- auriculiforme, auriculate, auriculiform
- ausente, lacking, wanting
- autóctono, autochthonous
- autogamia, autogamy
- autoploide, autoploid
- autótrofo, autotrophic
- axial, axile
- axila, axil
- axilar, axillary
- axonomorfa (raíz), tap root
- azuloso, bluish