- labellum, labelo
- labiate, labiado
- labium, labio
- lacerate, lacerado
- laciniate, laciniado
- lacking, ausente
- lactiferous, lactífero
- lacuna, laguna
- lacunose, lagunar
- lageniform, lageniforme
- lamellate, lamelado
- lamellose, lamelado, lameloso
- lamina, lámina
- laminal, laminal
- laminar, laminar
- laminate, laminal
- lanate, lanoso
- lanceolate, lanceolado
- lanceoloid, sublanceolado
- lanuginose, lanuginoso
- lanulose, lanuloso
- larger, mayor
- lasi-, lasio-, lasi- lasio-, velloso
- lasianthous, lasianto
- lasiocarpous, lasiocarpo
- lateral, lateral
- latex, látex
- laticiferous, laticífero
- latrorse, latrorso
- latticed, clatrado
- lawn, césped
- lax, laxo
- leaf, hoja
- leaf stalk, pecíolo
- leaf-blade, lámina foliar
- leaf-sheath, vaina foliar
- leafless, afilo
- leaflet, folíolo
- leaf-like, foliiforme
- leafy, folioso
- legume, legumbre
- lemma, lema
- lenticel, lenticela
- lenticular, lenticular
- lepidote, lepidoto
- leptophyllous, angustifolio, leptofilo
- leptosporangiate, leptosporangiado
- liana, bejuco
- life form, hábito
- !igneous, leñoso
- lignous, leñoso
- ligulate, ligulado
- ligulate (of shape), ligular
- ligule, lígula
- liguliform, liguliforme, lorado
- lilac, lila (color)
- limb, limbo
- limestone, caliza
- linear, linear
- lineate, lineado
- lineolate, lineolado
- linguiform, lingüiforme, lingulado
- lingulate, lingüiforme
- lip, labio
- littoral, litoral
- lobate, lobado
- lobe, lobo
- lobulate, lobulado
- lobule, 1óbulo
- locular, locular
- locule, 1óculo
- loculicidal, 1oculicida
- locusta, locusta
- lodicule, lodícula
- loment, 1omento
- long-, 1ongi-
- long-acute, largamente agudo
- long-tapered, largamente atenuado
- longitudinal, longitudinal
- loose, laxo
- loosely, laxamente
- lorate, 1oriforme
- loriform, 1oriforme
- lower, inferior
- lower montane wet (rain) forest, selva mediana a baja perennifolia
- lowlands, tierras bajas
- lunate, lunular
- lustrous, brillante
- lyrate, lirado