alder
alnus
alnus glutinosa
background
black
black alder
botanical
botany
branch
bright
capillarity
carbohydrates
catkins
close up
common alder
cone
cones
european
european alder
fall
female
flora
food
fruit
goldfinch
green
growth
hard wood
leaf
leaves
light
male reproductive part
nature
nutrients
outdoor
photosynthesis
plant
plant life
principal producer
seasonal
seed
seeds
small
spring flowering
stomata
structure
sunlight
tree
water loss
wet habitats