BOTANY: SEEDS AND EMERUTS

receptacle

a part where all of the flowers are borne.

sepals

outermost and lowest whorl on a floral shoot, cover and protect the flower parts when the flower is bud.

calyx

Collective form of sepal

petals

ensures the sexual reproduction and fuses to form a tube or other floral shape.

corolla

Collective form of petals

stamen

male reproductive organ

filament

thin stalk of stamen

anther

sac-like structure where the pollen grains form.

generative cells

divides mitotically to form two non-flagellate male gametes

tube cells

produces pollen tubes through which the sperm cells travel to reach the ovule

pistil

female reproductive organ.

pistil

They bear ovules and has potential to develop into seeds.

pistil

May be separated or fused into a single structure.

stigma

pollen grains land

style

neck-like structure where the pollen tube grows.

ovary

jug-like structure where it contains one or more ovules and may develop into fruit

embryo sac

multicellular female gametophyte.

embryo sac

Embedded in the ovule containing seven cells with 8 haploid nuclei.

flowers

can occur in single or in cluster.

solitary flower

Single flower is called?

inflorescence

cluster of flowers is called?

disc florets

petals are separate and all the same length; radially symmetrical

ray florets

petals are fused together; bilaterally symmetrical

umbel

Pedicels converge on a single point, where they attach to the peduncle.

raceme

Similar in structure to a spike, but the florets have pedicels

corymb

A raceme in which the pedicels of the lower flowers are longer than those of the upper flowers so that the inflorescence has a flat-topped appearance overall

spike

Florets are sessile, attached directly to a central axis

panicle

A branched raceme

cyme

A flat-topped inflorescence in which the central flowers open firs

spadix

A floral spike with a fleshy or succulent axis usually enclosed in a spathe.

fruits

contains one or more seeds

simple fruit

develop from one carpel from a single, separate flower

compound fruit

develops from several ovaries in either a single or multiple flower/s.

aggregate fruits

has many small fruits each with a seed; develops from different ovaries of a single flower

multiple fruits

with fruits of separate flowers merged or packed closely together