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Published In: London Journal of Botany 5: 44. 1846. (London J. Bot.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 2/18/2011)
Acceptance : Accepted
Project data     (Last Modified On 2/18/2011)
Discussion:

Brachymitrion is a genus of six species (Koponen 1977, 1983; Goffinet 1999) with a Neotropical-African distribution. The genus is sometimes treated as a subgenus of Tayloria, however, Koponen (1977) recognized it as a genus characterized by: 1. few stomata in a short capsule neck, 2. hypophysis absent, 3. differentiated opercula, 4. exothecial cell walls evenly thickened, 5. capsules unchanged when dry, 6. peristome of 16 erect or slightly incurved, variously reticulate exostome teeth that are laterally attached above in pairs. Other distinctive features of the genus include the well-differentiated suboral region of the capsules that consist of thick-walled, rectangular cells oriented at right angles to those of the urn and relatively short setae that do not elongate after spore maturation.

The Central American species of Brachymitrion differ from other regional members of the Splachnaceae in having crenulate, serrulate or spinose-toothed leaf margins. They occur either as epiphytes or on soil. Goffinet (1999) provided a key to the six species of Brachymitrion.


 

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Brachymitrion Tayl., London J. Bot. 5: 44. 1846.

Tayloria Hook. subg. Brachymitrion (Tayl.) Broth., Nat. Pflanzenfam. 1(3): 500. 1903. 

Plants crowded, caespitose, bright- or yellowish green; stems erect, forked at base, central strand present; basal tomentum dense, branched, red, finely papillose. Leaves crowded and larger above, distant and smaller below, erect when moist, imbricate below and  variously twisted above when dry, spathulate or oblong-obovate, apex awned or apiculate; margins variously bordered, spinose-toothed, crenulate to serrate; costa single, subpercurrent; upper cells hexagonal-fusiform, basal cells rectangular to elongate-hexagonal. Setae short, yellowish or yellow-brown, twisted, mammillose or smooth. Capsules erect, urn cylindric, constricted below the suboral rim, hypophysis absent, neck short, wrinkled when dry; exothecial cells in longitudinal files, irregularly rectangular, walls more or less evenly thickened; stomata sparse; exostome teeth 16, brown or brownish red, incurved when dry, connected in pairs at the tips, endostome absent. Spores spherical to subspherical, finely papillose, light brown. Calyptrae cucullate or campanulate.

 

 
 
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