lecture 6 part 2 Flashcards
Name the two basic types of flower sex.
perfect (bisexual)
imperfect (unisexual)
Name the three basic types of plant sex. What is the corresponding type of flower sex for
each?
- Hermaphroditic plants only have bisexual flowers.
- Monoecious plants only have unisexual flowers, with staminate and pistillate flowers on the same individual. - Dioecious plants only have unisexual flowers with staminate and pistillate flowers on different individuals.
Draw a zygomorphic corolla and label anterior lobe(s) and posterior lobe(s).
Zygomorphic or bilateral symmetry (also called
irregular): only one plane of symmetry
see phone/notebook/google for picture
anterior = front, posterior = back
What is the difference between radial and biradial symmetry?
Radial (actinomorphic/regular) symmetry: three or more planes of symmetry, such that there is a repeating structural morphology when rotated less than 360° about an axis
Biradial symmetry: two (and only
two) planes of symmetry
***The difference between biradial and
radial symmetry is sometimes not
recognized, both being termed
radial symmetry or actinomorphy
What is the difference between protandrous and protogynous? between centrifugal and
centripetal?
Protandrous means stamens developing or pollen release occurring, prior to the maturation of carpels or stigmas being receptive. Protogynous means the reverse.
Centrifugal refers to developing from the center toward the outside while centripetal refers to development from the outside toward the center region
What is a claw, corona, hypanthium, limb, lip, lobe, spur, throat, tube?
A claw is a thin/small base of a sepal or petal.
A corona is a crown-like outgrowth between stamens and corolla.
A hypanthium is a generally tubular or cup-shaped structure a the top rim of which are attached the calyx, corolla and androecium.
A limb is the expanded portion of corolla or calyx above the tube, throat, or claw.
A lip is either of two variously shaped parts into which a calyx or corolla is divided.
A lobe is a segment of a synsepalous calyx or sympetalous corolla.
A spur is a tubular, rounded or pointed projection from the calyx or corolla, functioning to contain nectar.
A throat is an open, expanded region of a perianth, usually of a sympetalous corolla.
A tube is a cylindrically shaped perianth or region of the perianth, usually of a sympetalous corolla.
What are the two major types of perianth arrangement?
Spiral, whorled
What is perianth cycly?
refers to the number of whorls of perianth parts
Name the two parts of a stamen; the two parts of an anther.
stamen has the anther and filament
anther has two compartments called thecae and connective
What is the difference between stamen arrangement and stamen position
arrangement: stamen placement relative to each other
position: placement relative to other floral parts
What is the difference between a gynoecium, carpel, and pistil?
A gynoecium is all female organs of a flower.
A carpel is a unit of the gynoecium that collectively makes a pistil.
A pistil is composed of an ovary, one or more styles, and or one or more stigmas
What are the three parts of a pistil? What is a locule?
Pistils are made of ovaries, styles, and stigmas. A locule is an ovary cavity, enclosed by the ovary walls and septa
Name the three types of gynoecial fusion
If a gynoecium has a single carpel, it is called monocarpous. If a gynoecium has multiple, distinct (free, unfused) carpels, it is apocarpous. If a gynoecium has multiple carpels “fused” into a single structure, it is syncarpous
