Hyophila rosea R.S.Williams
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Authority
Sharp, Aaron J., et al. 1994. The Moss Flora of Mexico. Part One: Sphagnales to Bryales. Mem. New York Bot. Gard. 69 (1): 1-452.
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Family
Pottiaceae
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Scientific Name
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Description
Species Description - Plants green above, dark-green or brown below, branched from the base. Stems up to 8 mm high; central strand and hyaloderm lacking. Stalked, green, stellate propagula generally 200-300 µm long often borne in leaf axils. Leaves incurved when dry, wide-spreading when moist, interruptedly rosulate-tufted, up to 2.5, or rarely 3.4 mm long, broadly elliptic to spatulate, rounded to broadly acute and stoutly mucronate, narrowed at the base and often auriculate, channeled along the costa, often fragile; margins narrowly recurved in the lower 1/4, entire; costa percurrent to shortly excurrent, often red-brown, semi-circular in section, with both stereid bands strong, guide cells in 1 layer, and hydroids lacking, the cells at both surfaces elongate and smooth ventrally but papillose dorsally; upper cells unpatterned, 6-8 µm wide, quadrate, evenly thick-walled, bulging and roughened by 4-6 small, simple papillae on both surfaces; cells across the insertion rectangular, 2-4:1 and 8-12 µm wide, with walls thin or evenly thickened. Dioicous. Sporophyte not seen.
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Discussion
Fig. 202
H. rosea Williams, Bull. New York Bot. Gard. 8: 341. 1914.
H. comosa Dix. & P.-Varde, Arch. Bot. 1: 166.1927.
The species is referred to Hyophila because of capsules lacking a peristome and elliptic to spatulate leaves with no hydroids in the costa. The stellate propagula are similar to those of H. involuta (and also some species of Barbula). The distinctive features of the species include the absence of a central strand, leaf cells bulging on both surfaces, and costa with cells at the ventral surface elongate. On testing with a 2 % solution of KOH, 3-4 rows of cells at the leaf insertion turn bright red. In this w a y confusion with Weissia, Neohyophila, and other species of Hyophila can be avoided.
The type specimens of both H. rosea and H . comosa (both in FH) compare well with Mexican specimens. The type of H. rosea has stellate propagula, but Indian populations may have oval propagula (illustrated by Gangulee, 1972).
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Distribution
On moist rock or bark of trees, at altitudes up to 1200 m. This first report of H. rosea from the New World is based on several Mexican collections in herb. TENN: Jalisco (Puerto los Mazos, W of Autian, Sharp et al. 3223), Nayarit (9 km E of San Bias, Norris & Taranto 13382, and Jalcacatan, Norris & Taranto 13770, 18780, 13786, 15166), Puebla (El Cerro de Cuhuatepec, Sharp 1438), Tamaulipas (Rancho del Cielo, on road to Gomez Farias, Smith et al. 295).—Mexico; India; Philippines
Mexico North America| India Asia| Philippines Asia|