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Published In: Annales des Sciences Naturelles; Botanique, sér. 2 9: 57. 1838. (Ann. Sci. Nat., Bot., sér. 2) Name publication detail
 

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Discussion: Fissidens crispus is a common and extremely variable species, which can be recognized usually by the dark bronze color of the lower part of the stem and by the bistratose limbidium that ends below the leaf apex. The leaves are usually crispate when dry, nearly entire, and, except at the apices, limbate throughout. The limbidia on the dorsal and ventral laminae are typically 2 cells thick. The laminal cells are richly chlorophyllose, usually have bulging cell walls, and often appear to be arranged in discrete rows. The dorsal lamina, on the same plant, can end at the insertion or be decurrent for nearly an internodal length. The presence of axillary hyaline nodules distinguish this from related species.
Illustrations: Bartram (1949, Fig. 4 C–E; Fig. 4 A–B, as F. longidecurrens).
Habitat: On shaded soil, tree trunks and moist rocks at moderate to high elevations.
Distribution in Central America: GUATEMALA. Alta Verapaz: Standley 70469 (FH, NY); Chimaltenango: Godman & Salvin (FH); El Progreso: Sharp 2717 (FH); Escuintla: Holdridge (MICH); Huehuetenango: Steyermark 50457 (FH, MICH, NY); Quetzaltenango: Steyermark 34092a (FH); Quiché: Richards et al. 2950 (PAC); Sacatepéquez: Williams 43539 (PAC); San Marcos: Sharp 5471 (FH); Sololá: Richards et al. 2922 (PAC); Zacapa: Steyermark 29452 (FH, MICH). EL SALVADOR. La Libertad: Chapman B-21 (MICH); Santa Ana: Watson 83 (MO). HONDURAS. Comayagua: Allen 11052 (MO, TEFH); Lempira: Allen 11403 (MO, TEFH); Morazán: Allen 12393 (MO, TEFH); Olancho: Allen 12529 (MO, TEFH); Santa Bárbara: Allen 11696 (MO, TEFH). NICARAGUA. Matagalpa: Danin 4-J (MO). COSTA RICA. Alajuela: Crosby 10026 (MO); Cartago: Griffin 19477 (FLAS, PAC); Heredia: Grayum 9629 (MO); San José: Valerio 206 (FH, US). PANAMA. Bocas del Toro: Allen 5173 (MO); Chiriquí: Nee 14440 (MO); Darién: Concepción 22 (PAC, PMA).
World Range: Southwestern U.S.A.; Mexico; Central America; Caribbean, Western, Northern, and Southern South America, Brazil.

 

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Fissidens crispus Mont., Ann. Sci. Nat. Bot., sér. 2, 9: 57. 1838. Type. Peru, d'Orbigny (FH).

Fissidens repandus Wils., Kew J. Bot. 3: 52. 1851. Type. Ecuador, Jameson 12 (NY).

Fissidens reclinatulus C. Müll. in Ren. & Gard., Bull. Soc. Roy. Bot. Belgique 31(1): 153. 1892. Type. Costa Rica, Polakowsky (FH, NY).

Fissidens aequalis Salmon, Ann. Bot. 13: 120. 1899. Type. Guatemala, Hooker 174 (NY).

Fissidens longidecurrens> Thér., Smithsonian Misc. Collect. 78: 10. 1926. Type. Mexico, Arséne 4892 (US).

Plants to 35 mm × 3 mm. Leaves to 2.2 mm × 0.2–0.5 mm; apex acute to obtuse and apiculate; margins more or less entire, denticulate at leaf apices, limbate on all laminae, limbidia 2-stratose; vaginant laminae more or less equal, acute, 2/3–3/4 the leaf length; costa ending 1–3 cells below the apex, occasionally short excurrent; cells 6–10 µm, smooth but bulging, irregularly hexagonal. Sporophytes terminal.
 

 

 
 
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