Exer. 10: The Flower

sepals, petals, stamen, and carpels, forming four distinct

flower development in order

sepal

outermost whorl of floral leaves and are collectively called calyx

sepal

these are usually green structures shaped like simple entire or reduce leaves

sepal

protect the inner parts of the flower before it opens. it is important in protecting the unopened flower from desiccation

petals

• found inner to the sepals and collectively form the corolla

• the corolla is usually the most noticeable part of the flower

petals

• often large and showy

• important to attract possible pollinating agents

perianth or floral envelope

together, the petals and sepals form the

tepal

term used for the petals and sepals of some plants which are very hard to distinguish because these are similar in size, shape, and color

stamen

fertile or spore-bearing leaves found inner to the corolla

microsporangia

• stamen consists of four pollen-containing chambers called ???

• fused into an anther which is often borne on a stalk called the filament

androecium

what are stamens collectively called

carpel

terminal whorl of the flower

ovary

each carpel consists of an enlarged basal portion called the

ovary

contains the ovules that are destine to become the seeds

stigma

receptive area for the pollen

stigma

often borne on a stalk-like structure, the style that extends from the ovary

style

stalk-like structure that extends from the ovary

pistil

a single carpel may also be referred to as

compound pistil

has one or more carpels

gynoecium

carpels collectively form the

complete flower

all four whorls of modified leaves are present

incomplete flower

a flower that has any of the four whorls missing

perfect/bisexual flower

flowers that have both fertile whorls or leaves (stamen and pistil)

imperfect/unisexual flower

flowers that either only have the stamen or pistil present

staminate

flowers that only have stamen (male parts) present

pistillate

flowers that only have pistil (female parts) present

monocecious

plants that bear both pistillate and staminate flowers

dioecious

plants that bear either the staminate or pistillate flowers

regular/actinomorphic flowers

• flowers that exhibit radial symmetry

• when all petals develop equally

• perianth parts are similar in size and shape thus forming multiple lines of symmetry

irregular flowers

when perianth parts particularly the petals do not develop equally or are irregular

zygomorphic flowers

• when the perianth of the irregular flower forms mirror image when cut across a single plane

• exhibits bilateral symmetry

asymmetrical flowers

irregular flowers that do not form any line of symmetry

hypogynous flowers

if the ovary is superior or the fused stamens, sepals, and petals attach to the receptacle below the ovary

perigynous flower

flower has the parts attached halfway up the ovary or the ovary is semi-inferior or half-inferior

Hibiscus rosasinensis

gumamela scientific name

Caesalpinia pulcherrima

kabalyero scientific name

peacock flower

kabalyero english name name

Orchidaceae

orchid scientific name

Cucurbita maxima

squash scientific name

Cucumis sativus

cucumber scientific name

Lagenaria siceraria

bottlegourd scientific name

Carica papaya

papaya scientific name

Helianthus annuus

sunflower scientific name