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Wild barleys have clusters of three spikelets, and the callus is the portion of the rachis to which they attach. In other grasses, such as needlegrass and brome grasses, the foxtail consists of a single spikelet, with the callus being the hardened lemma tip. Retrorse barbs can be found on the callus, the lemmas, and the awns.
Foxtail (diaspore), the dry spikelet or spikelet cluster of some grasses Alopecurus, foxtail grasses - the scientific name literally means "fox tail" Bromus madritensis, foxtail brome; Hordeum jubatum, foxtail barley; Setaria, foxtail millets; Acalypha hispida, chenille plant or fox tail; Asparagus densiflorus, foxtail fern
A spikelet, in botany, describes the typical arrangement of the inflorescences of grasses, sedges and some other monocots. Each spikelet has one or more florets. [1]: 12 The spikelets are further grouped into panicles or spikes. The part of the spikelet that bears the florets is called the rachilla. [1]: 13
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Callus at the tip of a disarticulated spikelet cluster of Hordeum murinum. Light macrograph. Source: Curtis Clark: Date: 28 August 2005 (original upload date) Source: No machine-readable source provided. Own work assumed (based on copyright claims). Author: No machine-readable author provided. Curtis Clark assumed (based on copyright claims).
Researchers found that the foxes had been arranged much like the dogs were, suggesting that they, too, were companions for humans. “There is no reason why foxes could not be domesticated ...
Disarticulated cluster of three spikelets from Hordeum murinum. Scanning electron micrograph Source: Curtis Clark: Date: 28 August 2005 (original upload date) Source: No machine-readable source provided. Own work assumed (based on copyright claims). Author: No machine-readable author provided. Curtis Clark assumed (based on copyright claims).
In grasses, two bracts known as "glumes" form the lowermost organs of a spikelet (there are usually two but one is sometimes reduced; or rarely, both are absent). [1] Glumes may be similar in form to the lemmas, the bracts at the base of each floret. In sedges, by contrast, a glume is a scale at the base of each flower in a spikelet. [2]