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Schistidium halinae (Grimmiaceae, Bryopsida), a new moss species from the Antarctic

Ryszard Ochyra
Annales Botanici Fennici
Vol. 35, No. 4 (1998), pp. 267-273
Stable URL: http://www.jstor.org/stable/23726634
Page Count: 7
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Schistidium halinae (Grimmiaceae, Bryopsida), a new moss species from the Antarctic
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Abstract

Schistidium halinae Ochyra (Grimmiaceae, Bryopsida) is described as a new species based on ten collections from the maritime West Antarctic. It differs from the congeners in (1) its piliferous upper leaves giving the plants a hoary appearance, (2) sharply spinulose-denticulate, hyaline, broad, flattened and membraneous hair-points, 0.2— 1.0 mm long on the upper leaves, (3) narrowly recurved and partially bistratose margins in the upper half leaf, (4) presence of a large central strand, (5) short-rectangular and sinuose laminal cells in the lower middle, and (6) long-rectangular basal juxtacostal cells with straight incrassate walls and quadrate to short-rectangular basal marginal cells forming a band 4—6 cells wide. Additionally, the capsules are deeply immersed in the ovate perichaetial leaves with a plane or narrowly recurved margin on one side below the apex and terminated with a long, hyaline hair-point (0.6—1.4 mm). The exothecial cells are mostly isodiametric to oblong, thin-walled with distinct corner thickenings and the peristome teeth are erect, lanceolate, perforate to irregularly cracked. The new species is fully described and illustrated and its affinities are discussed. Schistidium halinae is currently known from King George and Livingston Islands in the South Shetland Islands and from Vega and James Ross Islands near Trinity Peninsula on the NE coast of the Antarctic Peninsula. The distribution is mapped.

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