continual
long
abiding
age-long
aged
amphibian
ancient
angiosperm
annual
antique
aquatic plant
articulated
biennial
catenated
ceaseless
chattering
chronic
concatenated
connected
constant
continued
continuing
continuous
cosmopolite
cutting
cyclical
deciduous
deciduous plant
dicot
dicotyledon
direct
diuturnal
durable
endless
enduring
ephemeral
eternal
ever-blooming
ever-new
evergreen
everlasting
exotic
featureless
flowering plant
fungus
gametophyte
gapless
gymnosperm
half-hardy
abundant
dewy
fragrant
hardy
herbaceous
inexhaustible
inward
luxuriant
permanent
perpetual
tropical
unending
unfailing
bicentennial
centennial
decennial
millennial
quadrennial
triennial