Andreaea sect. Andreaea

Cerrejón, Carlos, Maguilla, Enrique, Quandt, Dietmar, Muñoz, Jesús & Luceño, Modesto, 2018, Andreaea barbarae (Andreaeaceae, Bryophytina), a new moss species from Lesotho, Phytotaxa 336 (2), pp. 148-158 : 154-155

Key to African species of Andreaea sect. Andreaea

1. Leaf bistratose ................................................................................................................................................................ A. bistratosa

- Leaf unistratose, rarely with some bistratose patches in the apical tiers............................................................................................2

2. Fertile spores more than 32.3 μm in diameter; leaf apex obtuse to rounded; upper leaf cells very thin-walled; non-dehiscent part of the capsule as long as to longer than dehiscent part......................................................................................................... A. barbarae

- Fertile spores less than 30.5 μm in diameter; leaf apex subacute, acute or acuminate, rarely obtuse; upper leaf cells more or less thick-walled; non dehiscent part of the capsule shorter than dehiscent part......................................................................................3

3. Upper leaf cells collenchymatous and pitted................................................................................................................. A. mildbraedii

- Upper leaf cells not collenchymatous nor pitted................................................................................................................................4

4. Leaves obovate or panduriform widest above the middle, apex obtuse to subacute….................................................... A. cucullata

- Leaves linear-lanceolate to ovate, occasionally panduriform, widest below the middle, apex acute to acuminate...........................5

5. Leaves not papillose or with low papillae in the dorsal side................................................................................................... A. firma

- Leaves with high papillae in the dorsal side.......................................................................................................................................6

6. Vegetative leaves narrowly linear to lanceolate, scarcely different from perichaetial leaves .................................... A. tsaratananae

- Vegetative leaves lanceolate to ovate, very different from perichaetial ones.................................................................. A. borbonica