Brothera leana (Sull.) Müll.Hal.

  • Authority

    Frahm, Jan-Peter. 1991. Dicranaceae: Campylopodioideae, Paraleucobryoideae. Fl. Neotrop. Monogr. 54: 1-238. (Published by NYBG Press)

  • Family

    Dicranaceae

  • Scientific Name

    Brothera leana (Sull.) Müll.Hal.

  • Synonyms

    Campylopus leanus Sull. & Lesq., Syrrhopodon leanus Sull. ex Lesq. & James, Leucobryum leanum (Sull.) Kindb.

  • Description

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    Species Description - Plants small, only 3-6 mm high, in dense, yellowish to yellowish-green tufts. Stems radiculose at base, frequently with clusters of brood leaves in the comal tufts. Leaves 2-3 mm long, erecto-patent when wet, curled when dry, lanceolate, gradually contracted to a short, canaliculate apex; margins entire. Perichaetial leaves with broader base, abruptly contracted to a narrow leaf tip. Costa filling 2/3 of the leaf base, 155-180 µm wide, not sharply differentiated from the lamina, excurrent, in transverse section with lax dorsal and ventral hyalocysts (ventrally often with two rows of hyalocysts), and a median band of stereids (becoming substereidal towards the margins). Alar cells weakly differentiated, hyaline. Basal laminal cells hyaline, consisting of 8-10 rows, bistratose towards the costa, rectangular, 19-55 × 4-19 µm, narrower at margins. Upper laminal cells rectangular, 24-55 × 3-7 µm. Seta 5-6 mm long, yellowish, sinuose and twisted sinistrorsely in the upper part. Capsule erect, yellowish green, 0.5 x 1.2 mm, smooth, contracted towards the peristome. Exothecial walls incrassate, variable, without stomata. Annulus present. Peristome teeth entire (or rarely perforated ("windowed") in fully developed capsules), yellowish, striate at base and papillose at tips, 210-240 µm long. Spores yellowish green, smooth, 10-13 µm. Calyptra cucullate, fringed at base.

  • Distribution

    On rotten wood, on bark at bases of trees, on humic or peaty soil and on rocks from 200 to 2500 m in Central America (Mexico, Guatemala), also in North America (Arkansas to Virginia) and in Asia (Himalaya, East Asia).

    Mexico North America| Jalisco Mexico North America| Guatemala Central America| Huehuetenango Guatemala Central America|