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53 Cards in this Set
- Front
- Back
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Layer of cells at base of leaf that causes leaf to die and drop off |
Abscission layer |
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A small, dry, 1 seeded , unwinged fruit |
Achene |
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A flexible , often pendent , spike bearing unisexual, petal-less flowers |
Catkin or ament |
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Flowering plants whose seeds are born inside ovaries |
Angiosperm |
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On a Woody stem , all tissues outside the vascular cambium |
Bark |
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A modified leaf subtending a flower |
Bract |
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a small scar within a leaf scar left by the vascular bundle |
bundle scar |
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a collective term for all the petals of a flower |
corolla |
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a gymnosperm bearing cones |
conifer |
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opposite leaf arrangement in which each pair of leaves occurs at right angles to the pair above and below |
decussate |
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plants having unisexual flowers with only one sex per plant (Two houses) |
Dioecious |
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a fleshy one seeded fruit |
drupe |
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a shoot arising from an adventitious or dormant bud on a stem or branch of a woody plant |
epicormic |
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remaining green all year, not losing all leaves at the same time |
evergreen |
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all the plants, taken collectively from a specified region |
flora |
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a ripened ovary |
fruit |
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the level of classification between species and family |
genus |
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smooth and lacking hairs |
glaborous |
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has hairs on it |
pubescent |
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a cross between two different species |
hybrid |
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overlapping like the scales on a fish |
imbricate |
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a flower lacking any one of its 4 major parts (petals, sepals, pistils, stamens) |
incomplete |
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a small , corky growth on a twig or stem allowing for gas exchange |
lenticel |
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a localized plant tissue capable of cell division, giving rise to new cells and tissues |
meristem |
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a plant having male and female flowers on the same plant (one house) |
Monoecious |
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an introduced plant that escapes cultivation and then reproduces successfully on its own |
naturalized |
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the location on a twig from which a leaf arises |
node |
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palmate |
leaf structure radiating from a common point like fingers on a hand |
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the stalk of a leaf |
peticle |
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the arrangement of leaves on a twig |
phyllotaxy |
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an inflorescence with a long central axis and flowers with pedicels |
raceme |
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the main axis of a compound leaf |
rachis |
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a modified stem that grows underground often sending up aerial sprouts |
rhizome |
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a dry, indehiscent winged fruit |
samara |
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cones that remain closed long after the seeds are ripe |
serotinous |
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a leafy appendage attached to the petiole or twig at the base of the petiole |
stipule |
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the short woody pegs that attach spruce needles to their twig |
sterigma or sterigmata |
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a sharp-pointed modified branch |
thorn |
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meeting along the edges, but not overlapping -as in budscales |
valvate |
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another name for secondary xylem |
wood |
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tissue that conducts water from the roots to the leaves |
xylem |
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principal water conducting tissue in plants |
xylem |
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the principal food conducting tissue in plants |
phloem |
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Plants with only one seed leaf are classified as |
monocots |
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Plants with more than one seed leaf |
Dicots |
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Swedish botanist who developed the binomial naming system |
Carl Linnaeus |
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The central core of a stem or branch |
Pith |
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A plant that completes its life cycle in a single growing season |
Annual |
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A plant that completes its life cycle in 2 growing seasons |
Biennial |
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A plant that lives for more than two growing seasons |
perennial |
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primary leaf of an embryo |
cotyledon |
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shoots which develop late in the growing season from the current seasons bud |
lammas |
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the natural cycle based on season and climate |
phenology |
