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 rachilla test body was subjected to tensile testing by fixing it between the grips of an INSTRON universal testing machine, model 3365, with a 5kN load capacity, with the intermediate 5 cm of the test body being the portion tested.
Spikelets without rachilla remnant are observed in Lipocarpha and Volkiella.
A look into Figures 1, 2, 3 and 4 outlines a representation of the vascular system of a rachilla in the middle segment of the ear.
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.
The most important variations include: a) flower sexuality: spikelets with male and female flowers may be gynandrous (with the female flower distal), androgynous (with the male flower distal) and mesogynous (with female flowers proximal and distal to the male flowers); b) shape (shortly ovate, elliptical, lanceolate, linear, ovate, etc); c) compression (laterally or dorsiventrally compressed or more or less terete); d) rachilla internodes more or less straight, zigzag or flexuose; e) rachilla prolongation exceeding (e.
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.
Its covered kernels have long rachilla hairs and a white aleurone.
6 mm latum, brunneum, apicem stramineum valde incrassatum; rachilla 8-11 mm longa, exserta pars 4-5.
The spikelet in Eleocharis palustris consists of an indeterminate rachilla (Fig.
In the polyandrous Iriarteinae with stamen numbers that range from 17 to 145, Henderson (1990) observed that, in some species, the proximal flowers on a rachilla are larger and have more stamens than the apical flowers on the same rachilla.
The kernel has long rachilla hairs and white aleurone.