Ptychomitrium lepidomitrium (Müll.Hal.) Schimp.
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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
Ptychomitriaceae
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Scientific Name
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Description
Species Description - Plants rather coarse and robust, 3-4 cm high, in loose tufts, yellowish above, brownish below. Leaves crisped and contorted when dry, 5-6 mm long, lance-acuminate and acute, plicate near the base; margins narrowly revolute below, coarsely toothed above; costa percurrent; upper cells 8-10 µm wide, quadrate, often bistratose toward the margins; cells of the leaf base (above the area of insertion) linear, porose. Setae (1—)3—7 from the same perichaetium, 3-5 mm long; urn of capsules about 2.5 mm long, slenderly cylindric, smooth when old; operculum 1 mm long; peristome teeth reddish, split nearly to the base. Spores ca. 6.5 µm, smooth. Calyptrae scabrous on the ridges above, occasionally ± scabrous below or with an occasional erect hair in the lower half.
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Discussion
Fig. 310f-m
P. lepidomitrium Schimp. in B.S.G., Bryol. Eur. 3(fasc. 2/3). 1837, nom. nud:, (C. Mull.) B.S.G. ex Besch., Mem. Soc. Sci. Nat. Cherbourg 16: 185. 1872.
Brachysteleum lepidomitrium C. Müll., Syn. Muse. Frond. 1: 767. 1849.
B. reichenbachianumhor., Moosstud. 162. 1864.
? Glyphomitrium rugosum Mitt., J. Linn. Soc, Bot. 12: 105. 1869.
? Ptychomitrium rugosum (Mitt.) Jaeg., Ber. Thatigk. St. Gallischen Naturwiss. Ges. 1872-73: 102. 1874.
Brachysteleum cylindrothecium C. Mull., Bull. Herb. Boissier 5: 199. 1897.
Ptychomitrium cylindrothecium (C. Miill.) Par., Index Bryol. 1056. 1897.
P. serratum sensu Bartr., Fieldiana, Bot. 25:145.1949, non (C. Mull.) B.S.G. ex Besch., 1872.
A s compared with P. serratum the basal cells of the leaf are very narrow and porose, the setae commonly in clusters of 3-7, the capsules narrower and smooth when old, and the calyptrae scabrous above.
The report of P. serratum in The Mosses of Guatemala belongs to P. lepidomitrium instead. The specimen that Bartram referred to P. cylindrothecium also belongs to P. lepidomitrium, as do other specimens from Guatemala and Mexico given that name by Bartram and others. Ptychomitrium rugosum has a calyptra scabrous above and therefore seems to belong in synonymy with P. lepidomitrium. Judging from Weir's Musci Novae-Granatenses 198, P. lindigii (Hampe) Jaeg. seems referable to the same synonymy.
A drawing of the type of Brachysteleum reichenbachianum, made by Gepp and preserved at the New York Botanical Garden, shows the long, narrow, pitted cells of Ptychomitrium lepidomitrium and an accompanying annotation by Gepp indicates that it can indeed be referred to that species.
Trichostomumpolyphyllum Hook. & Tayl., reported from the state of Mexico by Kunth (1822), is apparently a nomen nudum, although T. polyphyllum (Sw.) Turn. 1804 is now known as Ptychomitrium polyphyllum (Sw.) B.S.G. Kunth's record may conceivably refer to some species of Ptychomitrium more or less resembling that European species.
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Distribution
On rocks, often, perhaps always non-calcareous, in moist places at 2300-3700 m alt.; Distrito Federal, Hidalgo, Jalisco, Mexico, Morelos, Oaxaca, Puebla, and Veracruz.—Mexico; Guatemala; Dominican Republic; Colombia.
Mexico North America| Guatemala Central America| Dominican Republic South America| Colombia South America|