Chapter 26- SEED PLANTS

anther

sac-like structure at the tip of the stamen in which pollen grains are produced

angiosperms

plant clade with specialized reproductive structures called flowers and fruits; includes monocots and dicots

carpel

female reproductive structure in a flowering plant, containing the style and stigma

conifer

dominant phylum of gymnosperms with the greatest variety of trees

cotyledon

primitive leaf that develops in the zygote; monocots have one cotyledon, and dicots have two cotyledons

dicot

(also, eudicot) related group of angiosperms whose embryos possess two cotyledons

flower

branches specialized for reproduction found in some seed-bearing plants, containing either specialized male or female organs or both male and female organs

gymnosperm

seed plant with naked seeds (seeds exposed on modified leaves or in cones)

monocot

related group of angiosperms that produce embryos with one cotyledon and pollen with a single ridge

nectar

liquid rich in sugars produced by flowers to attract animal pollinators

ovary

chamber that contains and protects the ovule or female megasporangium

ovulate cone

female cone (strobilus) containing two ovules per scale

ovule

female gametophyte

petal

modified leaf interior to the sepals; colorful petals attract animal pollinators

pollen grain

structure containing the male gametophyte of the plant

pollination

transfer of pollen from the anther to the stigma (sets the stage for fertilization but is not quite the same thing)

seed

structure containing the embryo, storage tissue, and protective coat (i.e., a fertilized ovule)

stamen

structure that contains the male reproductive organs (anther and filament)

strobilus

plant structure with a tight arrangement of sporophylls around a central stalk, as seen in cones or flowers; the male strobilus produces pollen, and the female strobilus produces eggs