Philonotis hastata (Duby) Wijk & Margad.
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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
Bartramiaceae
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Scientific Name
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Description
Species Description - Plants moderately robust (1-2 cm high), in dense, green or yellow-green tufts, tomentose below, erect, sparingly branched. Leaves laxly erect, rather crowded to ± distant, 0.8-1.2 mm long, oblong-lanceolate, broadly acute to blunt; margins narrowly revolute, serrate to below the middle, with teeth simple or paired; costa subpercurrent to percurrent, scabrous at back above; upper cells pellucid, laxly oblong or rhomboidal, up to 40 µm long, 10-15 µm wide, smooth or with a few blunt papillae at the upper ends; basal cells laxer, up to 60 µm long, 20 µm wide. Dioicous. Setae 1-2 cm long; capsules inclined, furrowed; operculum convex, apiculate; exostome teeth lanceolate, red-brown; endostome segments ± orange, papillose, with cilia single. Spores ovoid, 21-28 µm, warty. (Sporophytes not seen in Mexican material.)
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Discussion
Fig. 417e-j
P. hastata (Duby) Wijk & Marg., Taxon 8: 74. 1959.
Hypnum hastatum Duby in Mor., Syst. Verz. Zoll. Pfl. 132. 1846.
Bartramia laxissima C. Miill., Syn. Muse Frond. 1: 480. 1848, nom. illeg.
Philonotis laxissima (C. Mull.) Mitt, J. Linn. Soc, Bot. Suppl. 1: 61. 1859.
Bartramia amblyoblasta C. Miill., Linnaea 38: 631. 1874.
Philonotis amblyoblasta (C. Miill.) Jaeg, Ber. Thatigk. St. Gallischen Naturwiss. Ges. 1873-74: 81. 1875.
Bartramia elongatula C. Miill., Linnaea 43: 415. 1882.
Philonotis elongatula (C. Mull.) Kindb., Enum. Bryin. Exot. 93.1884.
P. elegantula sensu Par., Index Bryol. ed. 2,3:385.1904, nom. in syn., non (Tayl.) Jaeg., 1875.
Philonotis hastata has relatively large, lax leaf cells, most of them smooth, only a few with blunt projections at the upper ends.
The name Philonotis elegantula has been used for a species synonymous with P. rufiflora (Hornsch.) Reich, (and in turn with P. uncinata var. giaucescens) and also used, erroneously, in the sense of Paris' Index, for P. laxissima. Mexican material compares well with P. laxissima from Java, Samoa, and the Philippines. Also, because the size differences between P. elongatula and P. amblyoblasta alluded to by Theriot are not convincing, I have put P. amblyoblasta in synonymy here.
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Distribution
On humus and rock in mountain forests; Distrito Federal, Durango, Jalisco, Michoacan, Veracruz.-Pantropical.