distichous


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distichous

(dĭs′tĭ-kəs)
adj. Botany
Arranged in two vertical rows on opposite sides of an axis: distichous leaves.

dis′ti·chous·ly adv.

distichous

(of plant structures) arranged in two rows that are diametrically opposite.
References in periodicals archive ?
venustula Kunth) have distichously arranged glumes (Vrijdaghs et al, 2009), and Scirpoides varius Browning present the glumes with spiral phyllotaxis but occasionally appearing almost distichous (Browning & Gordon-Gray, 2011).
4 cm wide, imbricate but the rachis visible after anthesis, smooth to nervate, ecarinate, glabrous outside, sparsely brown punctulate-lepidote inside, apex rounded; flowers distichous, ascendent, 13-22 per spike, actinomorphic, corolla helicoiform, subsessile; sepals free, green, oblanceolate, 3-3.
8 cm wide, their stipes very short, brown-cream during anthesis (brown in dried specimens), lanceolate, subdense, with 12 to 14 lowers, distichous, complanate; rachis geniculate, quadrangular and exposed, totally covered by a ferrugineous indument; floral bracts ca.
Taxa with a combination of hollow upright barbed epidermal spicules, curved hollow skeletal and upright spicules, and a distichous radula with denticulate hooks include Pruvotina, Pararrhopalia Simroth, 1893, Eleutheromenia Salvini-Plawen, 1967, Labidoherpia Salvini-Plawen, 1978, and Gephyroherpia Salvini-Plawen, 1978; they were divided into two subfamilies on the basis of salivary gland morphology (Salvini-Plawen, 1978).
Experiments are continuing especially in ascertaining some sort of ratio of seedlings that turn out to be either spirostichous or distichous leaved.
During the vegetative stage, the terminal meristem produces leaves in a distichous phyllotaxis; once the floral induction has taken place, the inflorescence primary branches generally have a spiral arrangement (Bonnett, 1948; Weir & Dale, 1960; Moncur, 1981; Sundberg & Orr, 1996; Doust & Kellogg, 2002; Kellogg et al.
This new species can be distinguished from all known taxa due to an unusual combination of morphological features, like the distichous arranged leaves, leaf blades distinctly nerved on both sides with margins sparsely spinose, inflorescence curved and short, flowers strongly fragrant, sepals acuminate and dark purplish-wine, petals yellow with an obtuse and apiculate to subacute apex, forming a tubular corolla, and by the anthers basaly connate and equaling the petals.
While morphological characteristics unique to Pleurostachys include distichous spikelet scales and hypogynous bristles that are flattened and have distal pubescence, there are other characteristics that are also found in Rhynchospora.
Generic classification in tribe Cypereae and subfamily Cyperoideae dates back to Linneaus (1753), who described the genera Scirpus and Cyperus to include all species of Cyperaceae with bisexual flowers, and distinguished by the spiral versus distichous glume arrangement in Scirpus and Cyperus respectively.
Lateral spikes, arrangement of perigynia: spiral (0), distichous (1) 20.
Flowers distichous, divergent, suberect, not secund, fragrant, densely arranged before anthesis and afterwards, 8.
Some individuals had been brought into cultivation and have flowered repeatedly but with more numerous flowers in perfectly distichous arrangement (fig.