Terms Helpful in Weed Identification
(Lesson 4. Weed Control in Pastures continued)
alternate leaves: leaves attached singly along a stem.
axil: point where a leaf or branch is attached to the stem.
bract: a modified leaf structure that surrounds the flower on some plants.
leaflet: a division of the leaf.
lobe: the leaf margin that is shallowly or deeply divided into sections or divisions.
opposite leaves: leaves attached in pairs along the stem.
pappus: a cluster of fine hairs attached to the seed in some plants, e.g., dandelion.
rhizome: an underground creeping stem which provides the means of production of some perennial plants.
rosette: a basal cluster of leaves. The first year’s growth of biennial plants.
stolon: an above-ground prostrate stem which provides the means of reproduction of some perennial plants.
whorled leaves: three or more leaves attached at the same point along a stem.
winter annual: an annual plant that initiates growth in the fall and produces seed the following spring.
winged: any membranous extension or in some instance the extension of the leaf blade.