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II. ROOTS
A. Root Parts
- Root Cap. Parenchymatous, protective apex of root.
- Root Hair. Lateral, absorbing outgrowth of the epidermal cell.
- Secondary Root. Lateral root with root cap and hairs, derived from the pericycle.
B. Root Types
(Classification based on position and origin)
- Adventitious. Arising from organ other than root; usually lateral.
- Primary. From radicle of embryo; tip of main axis.
- Secondary. From pericycle within the primary or secondary root; lateral.
- Aerating or Knee. Vertical or horizontal aboveground roots.
- Aerial. Fibrous, adventitious roots, frequently with an adhesive disk; a crampon.
- Buttress. Roots with board-like or plank-like growth on upper side, presumably a supporting structure.
- Contractile or Pull. Roots capable of shortening, usually drawing the plant or plant part deeper into the soil, usually with a wrinkled surface.
- Fascicled. Fleshy or tuberous roots in a cluster.
- Fibrous. With fine, threadlike or slender roots.
- Fleshy. Succulent roots.
- Haustorial. Absorbing roots, within host of some parasitic species.
- Moniliform. Elongate roots with regularly arranged swollen areas.
- Pneumatophorous. With spongy, aerating roots, usually found in marsh plants.
- Prop or Stilt. Adventitious, supporting roots usually arising at lower nodes.
- Tap. Persistent, well-developed primary root.
- Tuberous. Fleshy roots resembling stem tubers.
[ PREVIOUS SUBSECTION ]
[ Section A ]
[ Section B ]
[ Section C ]
[ Section D ]
[ NEXT SUBSECTION ]
[ Introduction ]
[ Beginning of Chapter ]
[ System of Characterization ]
[ Character Classification ]
[ Figures ]
[ Phytographic Literature ]