Fissidens crispus Mont.

  • 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

    Fissidentaceae

  • Scientific Name

    Fissidens crispus Mont.

  • Description

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    Species Description - Plants erect to decumbent, flexuous, (0.2-)0.5-1.5(-3.7) cm long; stems commonly dark reddish-brown. Leaves tightly crispate when dry, often somewhat curved downward at the tips when moist, oblong to lanceolate, acute to obtuseapiculate, (0.7-) 1.2-1.8(-3.5) mm long; margins entire, often denticulate at the leaf apex, bordered all around, the border usually ending somewhat below the apex, (4-)7-13(-22) µm wide, (1—)2(—3) cells thick, often edged with 1-3 rows of quadrate to rectangular, green cells o n the vaginant laminae; costa prominent, percurrent or ending 1-3 cells below the apex, occasionally short-excurrent; dorsal lamina variable, often on the same plant, narrowing to the insertion, ceasing at or above the insertion or decurrent, often to the next leaf below; vaginant laminae 2/3 - 3/4 the leaf length, ± equal; cells arranged in ± discernible rows, irregularly hexagonal to quadrate (5—)6—8(—11) µm long, in cross-section 2:1 (twice as deep as wide), strongly convex, becoming larger toward the leaf base. Dioicous, sometimes synoicous, perhaps also rhizautoicous,. Perigonial stems shorter than perichaetial stems. Setae terminal, flexuose, (2—)3—6(—12) mm long; capsules erect and symmetric to suberect and asymmetric, (0.4-) 0.7-0.9(-1.2) mm long; opercula conic to conic-rostrate; peristome teeth finely papillose below, spirally thickened above. Spores (9-) 13-16 µm, finely papillose. Calyptrae cucullate.

  • Discussion

    Fig. 39

    F. crispus Mont., Ann. Sci. Nat. Bot. II, 9: 57. 1838.

    F. repandus Wils., Kew J. Bot. 3: 52. 1851.

    F. tortilis Hampe & C. Mull., Bot. Zeitung 22: 340. 1864.

    F. reclinatulusRen. &Card., Bull. Soc. Roy. Bot. Belgique31(l): 153. 1893.

    F. carionisC. Mull., Bull. Herb. Boissier 5: 171.1897.

    F.fasciculato-bryoidesC. Mull., Bull. Herb. Boissier 5: 172. 1897.

    F. aequalis Salm., Ann. Bot. 13: 120. 1899.

    F. pringlei Card., Rev. Bryol. 36: 69. 1909.

    reclinatulusvar. brevifolius Card., Rev. Bryol. 36: 69. 1909.

    heribaudii Broth. & Par., Rev. Bryol. 40: 33. 1913.

    arsenei Broth. & Par. ex Ther., Smithsonian Misc. Collect. 78(2): 1926.

    tortilis var. brevifolius (Card.) Ther., Smithsonian Misc. Collect. 8(2): 9. 1926.

    F. longidecurrensTher., Smithsonian Misc. Collect. 78(2): 10. 1926.

    F.flexuosus Ther., Smithsonian Misc. Collect. 78(2): 10.1926.

    This is the most common and variable species of Fissidens in Mexico, probably occurring in all the states. The crispate leaves, with more or less entire borders, percurrent costa, and bulging cells in longitudinal rows and about twice as deep as wide (as seen in cross-section) easily distinguish F. crispus from its closest relatives.

    A record of F. bryoides H e d w . from Zacatecas (Delgadillo & Cardenas, 1979) can be referred here.

  • Distribution

    On moist soil of stream banks and limestone boulders and tree bark in forests at low to moderately high elevations (ca. 150-3300 m); Baja California, Chiapas Chihuahua, Coahuila, Distrito Federal, Durango, Guanajuato, Guerrero Hidalgo Jalisco, Mexico, Michoacan, Morelos, Nayarit, Nuevo Leon, Oaxaca Puebla, Queretero, San Luis Potosi, Sonora, Tabasco, Tamaulipas, Tlaxcala, Veracruz, Zacatecas.—Mexico; Central America; South America; West Indies.

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