- La Española, Hispaniola
- labelo, labellum
- labiado, labiate
- labio, lip, labium
- lacerado, lacerate
- laciniado, laciniate
- lactífero, lactiferous
- ladera, hillside, slope
- lageniforme, lageniform, flask-shaped
- laguna, lacuna
- lagunar, lacunose
- lamelado, lamellate, lamellose
- lameloso, lamellate, lamellose
- lámina, blade, lamina
- lámina foliar, leaf-blade
- laminal, laminal, laminate
- laminar, laminar, laminal, laminate
- lanceolado, lanceolate
- lanoso, lanate, woolly
- lanuginoso, lanuginose
- lanuloso, lanulose
- largamente agudo, long-acute
- largamente atenuado, long-tapered
- lasi- lasio-, lasi-, lasio-, villous
- lasianto, lasianthous
- lasiocarpo, lasiocarpous
- lateral, lateral
- látex, latex
- laticífero, laticiferous
- latrorso, latrorse
- laxamente, loosely
- laxo, lax, loose
- legumbre, legume, pod
- lema, lemma
- leñoso, ligneous, lignous, woody
- lenticela, lenticel
- lenticular, lenticular
- lepidoto, lepidote
- leptofilo, angustifoliate, leptophyllous
- leptosporangiado, leptosporangiate
- levovoluble, sinistrorse
- libre central, free-central
- lígula, ligule
- ligulado, ligulate
- línea de germinación fenestral, germination flap
- lingular, lingulate (of shape)
- liguliforme, liguliform
- lila (color), lilac
- limbo, limb
- línea fisural, pleurogram (applied to seeds)
- lineado, lineate
- linear, linear
- lineo1ado, lineolate
- linguiforme, lingulate, linguiform
- lingulado, lingulate, linguiform
- lirado, lyrate
- liso, smooth, even
- listado, streaked, striped
- litoral, littoral
- lobado, lobate
- lobo, lobe
- lobulado, lobulate
- lóbulo, 1obule
- localizado, localized
- locular, locular
- -locular, -celled
- loculicida, loculicidal
- lóculo, locule, cell
- locusta, locusta
- lodícula, lodicule
- lomento, loment
- longi-, long-
- longitudinal, longitudinal
- lorado, liguliform
- loriforme, loriform, lorate
- lunular, lunate, crescent-shaped