from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Botany Arranged in two vertical rows on opposite sides of an axis: distichous leaves.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Arranged in two rows on each side of an axis
from The Century Dictionary and Cyclopedia
- Disposed in two rows; biserial; bifarious; dichotomous; specifically, in botany, arranged alternately in two vertical ranks upon opposite sides of the axis, as the leaves of grasses, elms, etc. Also distich.
In the yew (_Taxus_) the leaves at the ends of the shoots not unfrequently lose their usual distichous arrangement and become arranged in a close spiral manner, the elongation of the shoot being arrested.
The _leaf-sheaths_ are equal to or longer than the internodes at the base, but shorter above, glabrous, compressed, distichous, bearded towards the mouth and with membranous margins.
The _leaf-blade_ is narrow linear, pungent, somewhat rigid, flat, distichous, base rounded with or without a few long hairs and varies in length from 1/4 to 1 inch and in breadth from 1/20 to 1/16 inch, but in plants growing in rich moist soils the leaves become longer reaching
Spikelets are very minute, one-flowered, half immersed in the alternating distichous cavities of the rachis of the spike; rachilla is bearded.
The _leaf-sheaths_ are distichous and towards the base of the stem are
Stems are numerous, stiff and erect, 1/2 to 3 feet in length, glabrous, covered below by brownish or whitish scale-leaves, and above with densely distichous leaves.
The _leaf-sheaths_ are distichous, compressed, glabrous or rarely hairy.
Male spikelets are 1 - to 2-flowered, subsessile, distichous, jointed on rigid peduncled spikes, which are collected in umbels and surrounded by spathaceous leafy bracts.
The _leaf-blade_ is soft, narrowly linear, finely acute, acuminate or pungent, somewhat glaucous, conspicuously distichous at the base of the stem and, in non-flowering branches, scabrid along the margins.
The _spikelets_ are very small, one-flowered, half immersed in the alternating distichous cavities of the rachis.
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