Weed
itchgrass
Rachis segmentRachis segment:
A segment of the central axis of the inflorescence (rachis). In some species (e.g. Andropogon) separation of the sessile spikelets occurs when the rachis disarticulates at the spikelet bases leaving the segment of the rachis between spikelets attached to the lower spikelet.
Cylindrical
Yellow
Smooth
Not visible
Not visible
Connective knob is between rachisRachis:
The central axis of an inflorescence.
segments, glumesGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.
.
RachisRachis:
The central axis of an inflorescence. disarticulates between each spikeletSpikelet:
One or more florets that are subtended by a pair of bracts called glumes. Spikelets are pedicellate if located on a pedicle and sessile if attached directly to the rachis. Often spikelets with single florets have remnants of a second floret, usually a lemma.
. Entire unit forms a cylinder with a knob on base. FloretFloret:
A small flower in a clustered inflorescence (e.g., sunflower, grasses). In grasses, a floret consists of the lemma, palea, stamens, and pistil.
is embedded inside the unit.
State Noxious Weed: Arkansas, Louisiana, North Carolina, South Carolina, Tennessee, Texas
Federal
Learn more on ITP's Federal Noxious Weed Disseminules tool.
Not included
Poaceae
Rottboellia cochinchinensis (Lour.) Clayton
Aegilops exaltata L.
Manisuris exaltata (L.) Kuntze
Rottboellia exaltata (L.) L. f.
