rachilla


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rachilla

(rə-kĭl′ə)
n. pl. ra·chillae (-kĭl′ē)
The axis of a spikelet of a grass or sedge.
References in periodicals archive ?
The fruit and rachillas used in the experiment were collected from the Active Germplasm Bank of the Universidade Federal de Vicosa (UFV), and its border.
At each node, the rachilla bore a lemma in whose axil a floret axis ascended.
The variety is a six-rowed, roughawned, long rachilla hair, white pearl spring barley.
Within this pattern, the Cypereae spikelets show variations in (Tables 1 and 2): (A) number and phyllotaxis of the glumes; (B) presence of empty glumes (lack of development of flowers in lower or upper glumes); (C) glume morphology; (D) rachilla internode length; (E) prophyll development; (F) flower structure; (G) structure of the dispersal unit.
The rachilla are cream-colored, with significant variations in length from the base to the apex (Table 1), ranging from 18 to 36 in number.
Under Caudescentia he separated the species according to the number of pistillate flowers, either one inserted at the base of the rachilla, or several superposed in the proximal part of the rachilla.
Achenium 1.6-1.9 mm longum, 1.1-1.3 mm latum; rachilla 5.5-7 mm longa, exserta pars 2.8-4.4 mm longa.
The results imply that, grains along the rachis were less affected in their nutrient concentrations than those along the rachilla. It is apparent that bolder grains on the whole, possessed relatively higher levels of copper, zinc and iron concentration at all the stages of grains development as compared to smaller grains developing in the same spike.
Apart from the staminodial structure mentioned in the first article, Hexopetion was also defined by the pistillate flower inserted at the base of the rachilla with contiguous staminate flowers that entirely and densely covered the rachilla--i.e.
Its covered kernels have long rachilla hairs and a white aleurone.
Achenium 3-3.6 mm longum, 1-1.6 mm latum, brunneum, apicem stramineum valde incrassatum; rachilla 8-11 mm longa, exserta pars 4-5.6 mm longa.