Grimmia elongata Kaulf.

  • 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.

  • Family

    Grimmiaceae

  • Scientific Name

    Grimmia elongata Kaulf.

  • Description

    Species Description - Plants up to 4.5 cm high. Leaves imbricate, rather rigid, 1-1.8 mm long, strongly keeled above, ovate-lanceolate to lanceolate, with hair points short or, in lower leaves, sometimes lacking; margins usually recurved on 1 side at midleaf, bistratose above; costa prominent at back, with 2 guide cells; cells often bistratose near the apex, 7-9 µm, quadrate or slightly longer than wide, thick-walled, ± sinuose above, longer and plainly sinuose below; basal cells 3-5:1, not sinuose. Dioicous. Perichaetial leaves u p to 2.8 mm long, with hair points short but sometimes as much as 0.4 mm long. Setae straight, up to about 2 mm long; capsules exserted, straight, 0.8-1.2 mm long, rarely more, ovoid, smooth; annulus deciduous, of 2-3 rows of large cells; operculum bluntly conic; peristome teeth entire or irregularly cleft at the tips. Spores 10-12 µm, smooth or nearly so. Calyptrae mitrate.

  • Discussion

    Fig. 296

    G. elongata Kaulf. ex Sturm, Deutschl. Fl. 2(15): 14. 1816.

    G. laxa C.Mull., Bot. Zeitung 5: 801. 1847.

    Guembelia laxa (C.Mull.) C.Mull., Syn. Muse. Frond. 1: 771. 1849.

    G.fuliginosa Schimp. ex C. Mull., Syn. Muse. Frond. 1: 778. 1849.

    Distinguishing characters include the robust stature, rigidly erect, strongly keeled leaves with short hair points, and elongate, smooth-walled basal cells, not differentiated at the margins.

  • Distribution

    Up to about 4500 m alt.; Jalisco, Mexico, Veracruz. —Mexico; western North America; Europe; Asia.

    Mexico North America| North America| Europe| Asia|