alternation of generations
anther
carpel
cork cambium
cotyledon
double fertilization
embryo sac
endosperm
filament
fruit
gametophyte
germinate
life cycle
meristem
nectar
ovary
ovule
petal
pith
pollen grain
pollen tube
pollination
primary growth
root meristem
secondary growth
secondary phloem
secondary xylem
seed
sepal
shoot meristem
sperm
spore
sporophyte
stamen
stigma
style
totipotent
vascular cambium
zygote
A seed from the Hackelia (stickseed) genus of plants, collected in Alberta, Canada. The dense covering of the seed with barbed hooks is a common feature of seeds and can improve a plant’s effectiveness at dispersing its seeds.
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