Monographs Details: Pottia starckeana (Hedw.) C.Müll. subsp. starckeana
Authority: Sharp, Aaron J., et al. 1994. The Moss Flora of Mexico. Part One: Sphagnales to Bryales. Mem. New York Bot. Gard. 69 (1)
Family:Pottiaceae
Description:Species Description - Plants loosely caespitose, 5-10 mm long, red-brown to green. Stems with central strand none or poorly differentiated and outer cortex poorly differentiated. Leaves erect-incurved when dry, ± spreading-recurved when moist, plane or somewhat keeled, oblong-ovate or ovate-lanceolate, acute and mucronate to short-awned; margins broadly recurved nearly to the apex, entire, often bordered by 2-3 rows of less papillose cells; costa percurrent to short-excurrent, covered ventrally by short, papillose cells and dorsally by elongate, smooth cells, with 2 guide cells in 1 layer and a small stereid band; upper cells in longitudinal rows, rounded-hexagonal or occasionally elongate in small patches, 15-20 µm wide and 1(-2):1, bulging on both sides, with 4-6 simple or bifid, hollow papillae; basal cells up to 3 0 µm wide and 2-3:1, thinor evenly thick-walled. Paroicous. Setae 2-3.5 mm long, weakly clockwise-twisted, yellow-brown; capsules 0.7-1.1 mm long, ovoid to short-ellipsoid, dark yellow-brown; annulus of 1 layer of persistent, vesiculose cells; operculum 0.2-0.3 mm long, short-conic, with cells in straight rows; exothecial cells rhomboid to oblong, thin-walled, 18-25 µm wide and 3-5:1; peristome teeth none, rudimentary or sometimes up to 150 µm long and triangular, spiculose, yellow. Spores 20-30(-40) µm, spherical to ellipsoid, pale yellowbrown, weakly papillose, sometimes hollow-warty and appearing wrinkled.

Discussion:

Fig. 280a-f

P. starckeana (Hedw.) C. Mull., Syn. Muse. Frond. 1: 547. 1849.

Weissia starckeana Hedw., Sp. Muse. 65. 1801.

Following Chamberlain (1969), all but one of the Mexican representatives can be assigned to the ssp. starkeana (with spores 20-30 µm, weakly papillose but with large, hollow warts and appearing to be wrinkled) or ssp. conica (with spores larger but in the range of 25-35 µm and weakly papillose to tuberculate or spiny).

Distribution:Oceania| Asia| Africa| Europe| United States of America North America| Mexico North America|