antrorse


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antrorse

[′an‚trȯrs]
(biology)
Turned or directed forward or upward.
References in periodicals archive ?
9 mm wide, flattish or channelled (at least proximally), glabrous, margins nearly smooth or with unbranched and 2-branched prickle hairs, the unbranched ones antrorse or retrorse; inner band of leaf sheaths white-hyaline or pale brown, glabrous, the apex slightly concave; ligules 0.
In this study, small seed size, antrorse hairs, hygroscopic awns, pappuses, and mucilaginous seed coats appeared to result in higher entrapment over the range of particle sizes.
Teeth in about 5 rows; 7-8 plus one emerging tooth along middle, 29 along posterior margin; compressed, along margins and anteriorly slender, unicuspid; mediad and caudad slightly coarser and longer, bicuspid, with strong posterior, antrorse cusp and minor anterior blunt cusp subdistally.
2 mm thick near the base, green throughout before anthesis and rose at base at anthesis, opaque, abaxially densely and coarsely white-lepidote with trichomes slightly obscuring leaf color, adaxially subdensely to sparsely and inconspicuously white-lepidote, margins densely to sparsely spinulose, spines subtriangular-uncinate, antrorse, yellowish, 0.
Leaves erect, curved at apex, acute to somewhat apiculated, lustrous green above, somewhat dull below, 6070 cm long, 6,4-7 cm wide, leaf sheath 11,5-12 cm long, glabrous, margins with dark antrorse, straight or retrorse thorns to 5 mm long, leaf apex with a reflexed mucro.
5 mm long, 8-25 mm apart, acicular, spreading to slightly antrorse, yellowish-castaneous toward the apex.