acroscopic


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acroscopic

[‚ak·rə′skäp·ik]
(botany)
Facing, or on the side toward, the apex.
References in periodicals archive ?
almost symmetrical, the acroscopic margin being only slightly enlarged.
shows auriculate acroscopic margins and asymmetrical venation.
This species can be recognized by pinnate laminae, segments conspicuously adnate on the acroscopic side, presence of hairs on the laminae, and ovate to lanceolate scales on the costal bases.
Rhizomes brown, not rugose, lacking whitish wax-like deposits; rhizome scales ovate, clathrate, light brown, shiny, margins hyaline, imbricate and covering the rhizome surfaces; laminae pinnate, subcoriaceous to coriaceous; medial pinnae sessile or only slightly adnate on the acroscopic side; rachises, costa, and veins abaxially glabrous or with sparse light brown to reddish brown hairs and narrow, reddish brown scales, adaxially glabrous; secondary veins raised on the abaxial surfaces, wider than the tertiary ones; margins of the pinnae cartilaginous; sori in 1-2(-3) rows between the costae and pinna margins.
Leaves up to 51 x 10 cm; lamina 2-pinnate to occasionally 3-pinnate; basal acroscopic pinnule of each pinna overlapping the rachis; unicellular hairs of the non laminar axes dark reddish, acicular, rigid, patent A.
Basal pinnae subsessile, the proximal ultimate acroscopic segments of basal pinnae suborbicular, usually conspicuously overlapping the rachis; rhizome scales sparsely denticulate--A.
04 mm wide; laminae 3-4-pinnate; pinnae broadly lanceolate; acroscopic pinnules (1.
Towards the base of an ultimate pinna, pinnules developed neuropteroid attachment (having lost both basiscopic sinus, and acroscopic constriction; Fig.