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36 Cards in this Set
- Front
- Back
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what is the function of a flower? |
reproduction; to produce seed |
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define pedicel |
the stalk of an individual flower in an inflorescence. Pedicel is not always present. |
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define bract |
modified leaf-like structure found at the base of the pedicel in some flowers. -poinsettia |
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define receptacle |
the tissue at the apex of the pedicel where the various flower parts are attached |
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define calyx |
the collective term for all the sepals of a flower |
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define sepal |
a single unit of the calyx the sepals look like small leaves and encircle the base of the other flower parts. |
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define corolla |
the collective term for all the petals |
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define petal |
a single unit of the corolla. usually large and brightly coloured to attract pollinators and other beneficial insects. |
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define androecium |
the collective term for all stamens (male parts of a flower) |
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define stamen |
one unit of the androecium. composed of an anther and a filament |
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define anther |
pollen bearing part of the stamen |
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define filament |
the stalk of the stamen which supports the anther |
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define gynoecium |
collective term for all the pistils (female parts of a flower) |
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define pistil/carpel |
a single unit of the gynoecium |
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define stigma |
the top of the pistil. it is sticky; this is where the pollen is received |
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define style |
the slender part of a pistil connecting the stigma and ovary |
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define ovary |
the basal part of the pistil. contains the ovules (eggs) |
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define ovule |
the structure which will develop into a seed once it is fertilized |
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what is a complete flower? |
a flower having all the flower parts: petals, receptacle, stamen, pistils. |
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what is an incomplete flower? |
a flower lacking one or more flower parts |
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a perfect flower is bisexual, meaning it has ... |
both female and male reproductive parts (pistils and stamens) |
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an imperfect flower has only... |
one sex. it is either a male or female flower |
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define monoecious |
male and female flowers found on the same plant. -melons, cucumbers |
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define dioecious |
a plant that has only male OR female flowers -gingko, kiwi |
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define synoecious |
the plant has all perfect flowers (flowers have both male and female parts) -most annuals and perennials |
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define radial symmetry |
the flower can be rotated to any position and still appear essentially the same -potentilla |
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define bilateral symmetry |
the flower does not have a uniform shape; flower would appear different if rotated -snapdragon, bean, pea |
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define inflorescences |
a group of individual flowers arranged on a single main stem |
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define raceme |
flowers with pedicels that are arranged along an elongated stem -hollyhock, snapdragon |
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define spike |
similar to a raceme, but the flowers do not have a pedicel (no flower stem attaching to the main branch or stem) -loosestrife, wheat grass |
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define catkin |
a spike or raceme of incomplete, imperfect flowers (flowers that are only male or female) *weeping, downward facing -birch, willow |
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define corymb |
a flat topped inflorescense (group of individual flower on a common stem) with pedicels (flower stems) of varying lengths that are arranged on an elongated common stem. otter flowers open first. -yarrrow, candytuft |
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define cyme |
flat or convex inflorescense with pedicels of varying lengths. flowers open from centre outward -summer phlox |
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define umbel |
flat topped or convex inflorescense with all pedicels rising from one point at the tip of the stem. - dill, onion |
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define head |
made up of ray and or disc flowers on a flattened receptacle. -daisy, dandelion |
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define panicle |
an indeterminate, branch inflorescense, made up of many racemes, spikes, corymbs or umbels. -most grasses: panicle of racemes -alfalfa: panicle of racemes -summer phlox: panicle of cymes |
