Brachymenium, Ochi, 1992

Canestraro, Bianca Kalinowski & Peralta, Denilson Fernandes, 2020, New and endemic species of Brachymenium (Bryaceae, Bryophyta) in the Atlantic Rainforest of Brazil, Phytotaxa 446 (4), pp. 220-228 : 226

Key to the new species of Brachymenium and closely related species in Brazil

1. Leaf costa sub-percurrent, space between the end of the costa and the arista more than five cells, leaf apex with a long and hyaline or yellowish arista; flagelliform branches absent...............................................................................................................................2

- Leaf costa sub-percurrent, percurrent to short-excurrent, space between the end of the costa and the awn less than five cells, leaf apex with a short and yellowish awn; flagelliform branches usually present ....................................................................................3

2. Leaf margin bordered by one row of narrow rectangular cells, reflexed base ............................... Brachymenium hornschuchianum

- Leaf margin not bordered, plane base ........................................................................................................ Brachymenium elimbatum

3. Leaf costa tapering above, usually sub-percurrent to percurrent, awn discrete ............................................ Brachymenium regnellii

- Leaf costa strong, continuous up to the awn, short-excurrent, awn conspicuous ..............................................................................4

4. Upper margin of the leaf with 1–3 rows of narrow rectangular cells, leaves oblong-lanceolate, apex usually falcate; exostome teeth frequently with the apex entire.................................................................................................................. Brachymenium sublinearis

- Upper margin of the leaf with one row of narrow rectangular cells, leaves lanceolate, elliptic to oblong, apex straight; exostome teeth perforate along the median line .......................................................................................................... Brachymenium klotzschii