TABLE 1 in Hymenasplenium hovenkampii (Aspleniaceae), a new bipinnatisect fern species from Lesser Sunda Islands of Indonesia

TABLE 1. Morphological comparison of Hymenasplenium hovenkampii and the three morphologically similar species.
CharacterH. hovenkampiiH. cheilosorumH. inthanonenseH. sabahenseRhizomesca. 2 mm in diam.2.5–4 mm in diam.3–6.5 mm in diam.ca. 3 mm in diam.Laminae dissectionbipinnatisect1-pinnate1-pinnate1-pinnateLaminae size14–20 × (1.5–)2–2.5(–3) cm15–35 × 3–5(–7) cm30–40 × 4–7 cm20–28 × 3–5 cmRachisesreddish browndark purplish to blackdark purpledark purplish to blackPinnaeshortly stalked to almost sessile at apex, 30–40 pairsalmost sessile, 25–40 pairsalmost sessile, 30–40 pairsshortly stalked to almost sessile at apex, 25–40 pairsPinna marginusually with 4–5 lobesusually with 7–10 lobesusually with 7–9 lobesusually with 5–7 lobesVeinsusually 3–4 or rarely all basal basiscopic veins lackingusually 6 or 7 basal basiscopic veins lacking6–8 basal basiscopic veins lacking5–6 basal basiscopic veins lackingSori1.5–2 mm long, at tip of subtending veins and located in or below marginal teeth1–3 mm long, at tip of subtending veins and located in marginal teeth2–4 mm long, supramedial, not confined to lobes2–4 mm long, at tip of subtending veins and located in marginal teeth