rachilla

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rachilla

[rə′kil·ə]
(botany)
The axis of a grass spikelet.
References in periodicals archive ?
Ten flowers/fruits were collected from the middle 1/3rd portion of the rachillae in each treatment.
24 mm in width, and are located in the apical rachillae of significantly shorter length (Table 2).
In the present work, the number of rachillae varies from 18 to 36.
9470) resembling Aiphanes erinacea but with longer, more narrowly cuneate pinnae, inflorescences with few rachillae inserted at long intervals along a short rachis, and spiny pollen.
at apex, densely armed (at least distally) with brownish black spines, to 3 cm long; rachis 23-29 cm long, armed like peduncle, but spines shorter distally; rachillae 22-24, white at anthesis, appressed to rachis, the distal ones somewhat spreading; basal rachillae to 20 cm long, armed with black, crimped spines to 1 cm long, the proximal half thickened, to 1.
The phylogenetic position of Carex baldensis is particularly significant because it suggests that rachillae axes in fertile utricles have evolved into complete androgynous lateral spikes (Reznicek, 1990; Starr et al.
The basal (sterile) part of the rachillae is pilose.
The basal part of the rachillae is covered with yellowish bristles.
Inflorescences interfoliar, erect to ascending, branched to one order, prophyll short, bicarinate, fibrous, hidden in leaf bases, peduncular bract prominent, rostrate, densely spiny adaxially, glabrous abaxially, peduncle densely spiny, rachis shorter than peduncle, not spiny, rachis and rachillae covered with a dense wooly-white tomentum, rachillae entirely covered by staminate flowers, these shallowly sunken in pits, pistillate flowers directly inserted at the base of rachilla or directly on main rachis in between staminate rachillae and without evident connection with them.
polysticha, staminate flowers are inserted all around the rachillae (fig.
This group is defined by the unilateral staminate flowers on staminate rachillae and conspicuous fiber clusters organized in one circle in the thick endocarp (Fig.