amputation through a joint (cacti)
Alternation of Generations
A life cycle in which there is both a multicellular diploid form, the sporophyte, and a multicellular haploid form, the gametophyte; characteristic of plants.
A condition in the life cycle of plants and certain algae in which the sporophyte and gametophyte generations differ in morphology.
Alternating generations in which the sporophytes and gametophytes look alike, although they differ in chromosome number.
the male gametophyte produced by a microspore
the female gametophyte produced by the megaspore of a plant that produces both microspore and megaspores
A plant species that has two kinds of spores: microspores that develop into male gametophytes and megaspores that develop into female gametophytes.
Referring to plants in which a single type of spore develops into a bisexual gametophyte having both male and female sex organs.
first leaf or first pair of leaves produced by the embryo of a seed plant
Floral organization in which the sepals, petals, and stamens are attached to the receptacle below the ovary; superior
flower with inferior ovary and the perianth and stamens arising from the floral cup or hypanthium that is adnate to the ovary
the sepals, petals, and stamens are attached to a cup-shaped extension of the receptacle; intermediate
Apiaceae, Shooting Star
"Small umbel" Clematis; not as common, flowers bigger +/- 2in.
Willows, Alders, Oaks
Asteraceae; disk flowers, ray flowers
Different whorls fused
Whorl fused to itself
one house; both sexes
The whorl of sepals of a flower collectively forming the outer floral envelope or layer of the perianth enclosing and supporting the developing bud
collective term for the outer parts of a flower consisting of the calyx and corolla and enclosing the stamens and pistils
Collective name for petals
collective term for the male reproductive parts of a flower
collective term for female portion of flower
The female reproductive organ of a flower, consisting of the stigma, style, and ovary.
flowers that lack stamens; have only pistils. Female flowers
flowers which lack pistils and bear only stamens. Male flowers
occurs in uniform environments where diversity isn't an advantage
the stalk of a plant ovule or seed
layers of sporophyte tissue that envelop and protect the megasporangium
minute opening in the wall of an ovule through which the pollen tube enters
two cells that flank the egg cell and function in the attraction and guidance of the pollen tube to the embryo sac
Outer layer of the wall of a pollen grain or spore. Designed to snag stigma
A mechanism of fertilization in angiosperms, in which two sperm cells unite with two cells in the embryo sac to form the zygote and endosperm.