Weed
Jointed goatgrass
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
Brown
Smooth
Internal in-spikeSpike:
Has a strong central axis (rachis) on which flowers or spikelets are directly attached (sessile), e.g. wheatgrasses.
segment. Tissue like.
Internal in-spikeSpike:
Has a strong central axis (rachis) on which flowers or spikelets are directly attached (sessile), e.g. wheatgrasses. segment. Tissue like.
FloretFloret:
A small flower in a clustered inflorescence (e.g., sunflower, grasses). In grasses, a floret consists of the lemma, palea, stamens, and pistil.
in 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.
is embedded in a segment of the rachisRachis:
The central axis of an inflorescence.
.
Cylindrical spikeSpike:
Has a strong central axis (rachis) on which flowers or spikelets are directly attached (sessile), e.g. wheatgrasses. breaks transversely 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.. Therefore each spikeSpike:
Has a strong central axis (rachis) on which flowers or spikelets are directly attached (sessile), e.g. wheatgrasses. segment contains one embedded floretFloret:
A small flower in a clustered inflorescence (e.g., sunflower, grasses). In grasses, a floret consists of the lemma, palea, stamens, and pistil..
State Noxious Weed: Alabama, Arizona, California, Colorado, Idaho, Kansas, Montana, New Mexico, Oklahoma, Oregon, Utah, Texas, Washington, Wyoming
Included
For more information, see ISMA fact sheet.
Poaceae
Aegilops cylindrica Host
Aegilops cylindrica Host var. rubiginosa Popova
Aegilops tauschii auct. non Coss.
Cylindropyrum cylindricum (Host) Á. Löve
Triticum cylindricum (Host) Ces., Pass. and Gibelli
