distichous


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distichous

[′dis·tə·kəs]
(biology)
Occurring in two vertical rows.
References in periodicals archive ?
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.
Experiments are continuing especially in ascertaining some sort of ratio of seedlings that turn out to be either spirostichous or distichous leaved.
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.
Flowers distichous, divergent, suberect, not secund, densely arranged in late anthesis, pedicels comparatively slender, ca.
coriaceous, apex with a hook-like projection, distichous arrangement;
The arrangement of the flowers along the axis (or rhachis) is usually spirostichous (spirally arranged) or distichous (two rows, opposite to each other).
The scape is erect, robust, ending with a distichous spike, covered with flowers that are especially brought closer together as in all hybrids coming from Vriesea psittacina var.