Drepanolejeunea (Spruce, 1884) Stephani, 1891

Inuthai, Janejaree, Chantanaorrapint, Sahut & Zhu, Rui-Liang, 2021, The liverwort genus Drepanolejeunea subgenus Rhaphidolejeunea (Lejeuneaceae, Marchantiophyta) in Thailand, Phytotaxa 522 (1), pp. 1-14 : 2

Key to species of Drepanolejeunea subgenus Rhaphidolejeunea in Thailand.

1. Free lateral lobular margin proximal to the notch bordered by 4(–7) strongly elongate rectangular cells ........................................2

1. Free lateral lobular margin proximal to the notch bordered by 7–18 subquadrate to shortly rectangular cells.................................3

2. Leaf lobe acute at apex; free lateral lobular margin proximal to the notch bordered by 4(–7) cells. Male bracteoles present throughout the androecial shoot. Leaf lobe with 1 or 2 ocelli ......................................................................................................... D. commutata

2. Leaf lobe rounded at apex; free lateral lobular margin proximal to the notch bordered by 4 cells. Male bracteoles restricted at the basal portion of the androecial shoot. Leaf lobe with two monoliate ocelli........................................................................ D. spicata

3. Free lateral lobular margin proximal to the notch bordered by 12−18 cells. Underleaf lobes triangular, consisting of 12 cells long, 3−4 cells wide at base. Leaf lobe with a single ocellus................................................................................................... D. siamensis

3. Free lateral lobular margin proximal to the notch bordered by 7–12 cells. Underleaf lobes needle-like or linear-triangular, consisting of 6−12 cells long, 2−3 cells wide at base. Leaf lobe with 1 or 2 ocelli ............................................................................................4

4. Male bracteoles present throughout the androecial shoot. Underleaf lobes consisting of 6−8 cells long. Leaf lobe with (1−)2 ocelli ............................................................................................................................................................................ D. yunnanensis

4. Male bracteoles restricted at the basal portion of the androecial shoot. Underleaf lobes consisting of 8−12 cells long. Leaf lobe with 1−2 ocelli .......................................................................................................................................................................... D. fleischeri