Glossary
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Raceme
An inflorescence type in which all the spikelets are pedicellate on the rachis.

Racemose
Branches that are like racemes; with some combination of sessile and short pedicellate spikelets.

Rachilla
The axis of the spikelet; the structure to which the glumes, lemma and floral axis are attached.

Rachis
The axis of a spike, spicate raceme, or raceme inflorescence.

Range Condition
The current productivity of rangelands relative to that land's natural productivity.

Reduced
Smaller in size, frequently lacking parts; in flowers the sexual parts may be absent.

Reduced floret
A floret that is either staminate or neuter. If it is highly reduced (e.g. awnlike structures) then it is sometimes called a rudimentary floret.

Reflexed
Bent downward or backward from the apex.

Resaca
An old river bed, e.g. and ox-bow.

Resinous
Producing a viscous substance or resin.

Reticulate
In the form of a network like some types of netted venation.

Retrorse
Pointing downward toward the base, as do the barbs on Cenchrus (sandbur).

Revolute
Turned under along the margins toward the abaxial surface.

Rhizome
A horizontal, underground stem with modified leaves at the nodes.

Rhizomatous
Having rhizomes; horizontal underground stems with nodes and internodes.

Rosette
A cluster of spreading or radiating basal leaves, as in Dichanthelium.

Rounded
Having an arched apex rather than a pointed and angled apex.

Rudiment
An imperfectly developed organ or part, specifically used in reference to florets. The rudiment of a spikelet is formed by structures of a reduced sterile floret.

Rudimentary
Not fully developed and non-functional.

Rugose
Wrinkled or folded; having horizontal folds in the surface.