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Botany roots shoots.txt
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Two types of roots
Fibrous (or diffuse) and tap
Drip zone
The area of soil around a tree occupied by root tips and into which water drips from the leaf canopy.
Root cap
A protective cover over a root tip.
Root hair
A hairlike projection of a root's epidermal cell.
Apical bud
A bud at the tip of a stem
Leaf primordium
An immature leaf located at stem tip
Axillary bud primordium
An immature axillary bud.... the beginning of a potential branch
Axil
The angle between the upper surface of a leaf and the stem to which it is attached.
Node
The segment of a stem to which leaves and axillary buds are attached
Internodes
The segment of a stem between two nodes
Three basic leaf arrangements
Alternate, opposite, whorled
Herbaceous
Soft, green, and containing little woody tissue
Cork
The protective outer tissue of the bark
Lenticles
A small gas-exchange opening in the cork of a woody stem
Leaf scar
A scar left on a stem after a leaf has fallen
Bud scale
A modified leaf protecting a bud.
Apical bud
A bud at the tip of a stem. (terminal bud)
Petiole
A leaf stalk.
Petiolate leaf
A leaf in which he blade is attached to the stem by a petiole.
Sessile leaf
A leaf in which the blade is directly attached to the stem.
Compound leaf
A leaf in which the blade is divided into separate leaflets.
Pinnately compound leaf
A leaf in which the leaflets are arranged on both sides of a common axis. "featherlike"
Palmately compound leaf
A leaf in which the leaflets radiate from one point.
Pinnate venation
A vein pattern in which the major veins are arranged in rows on either side of the midrib.
Palmate venation
A vein pattern in which the major veins radiate from one point.
Reticulate venation
A netlike vein pattern in some leaves.
Genera
Groups of related species
Intercalary meristem
A meristem located between nondividing tissues such as the base of a leaf. Grass for example.
Root functions
1. Anchor plant. 2. Absorb water and nutrients. 3. Store food.
Author
kjel
ID
70818
Card Set
Botany roots shoots.txt
Description
Botany, roots and shoots
Updated
2011-03-08T01:48:31Z
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