1 (1)	Plants terrestrial or on logs or tree bases; segments at base of blade gradually reduced to auricles; petiole scales threadlike and inconspicuous or absent; veins 2–3-forked. 1a. Pecluma ptilodon var. caespitosa		(1)
+	Plants epiphytic or on rock; segments at base of blade abruptly reduced, or base narrowed to truncate; petiole scales cordate and appearing inflated or hastate and flat; veins 1–2-forked.		(2)
2 (2)	Leaves linear-elliptic; segments linear, proximal segments not deflexed, reduced abruptly to mere lobes; petiole scales cordate and appearing inflated; veins 1-forked; spores 64 per sporangium. 2. Pecluma plumula		(2)
+	Leaves narrowly ovate; segments narrowly ovate to linear, proximal segments deflexed, occasionally reduced to auricles; petiole scales hastate, flat; veins 2-forked; spores 32 per sporangium. 3. Pecluma dispersa		(1)