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Syntrichia bartramii Zander 1993

Comments

provided by eFloras
Diagnostic features of the rare Syntrichia bartramii include plane leaf margins and the costa excurrent into a tapered, serrate awn. In contrast with those of S. fragilis, the leaves of S. bartramii are not fragile and have awns, somewhat smaller, more obscure distal cells, less well-defined groups of basal cells, and plane margins. Without propagula, plants of S. laevipila can be separated from S. bartramii by the abaxially smooth costae and smooth awns, and also by larger and less obscure leaf cells. It should be noted that leaves of S. bartramii sometimes show 2-stratose patches (one or a few cells in width). In contrast, S. chisosa has leaves that are almost completely 2-stratose distally, less twisted when dry, and merely mucronate at the apex.
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copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 27: 619, 621, 622 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
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eFloras.org
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eFloras

Description

provided by eFloras
Stems 2-10 mm. Leaves infolded and spirally twisted around the stem when dry, wide-spreading when moist, lingulate to spatulate, 1.25-2 × 0.5-0.75 mm; margins plane, entire, except for papillose crenulations, not bordered; apices acute to truncate or occasionally emarginate; costa excurrent into a conspicuously tapered, serrate awn 0.1-0.6 mm, red or yellow, sparsely to densely spinulose abaxially; basal cells abruptly differentiated, with somewhat thickened cross walls, those at the margins narrower; distal cells irregularly polygonal, isodiametric, 9-13 µm, obscure, bulging and densely papillose, with 4-6 papillae per cell, moderately thick-walled and not collenchymatous. Specialized asexual reproduction absent. Sexual condition dioicous (perigonia and sporophytes unknown).
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 27: 619, 621, 622 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Synonym

provided by eFloras
Tortula bartramii Steere in A. J. Grout, Moss Fl. N. Amer. 1: 241, plate 115, fig. B. 1939
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 27: 619, 621, 622 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras