32 Fig. 10 FERNS <strong>and</strong> ALLIED PLANTS FDRV1 March 2011
FERNS <strong>and</strong> ALLIED PLANTS 33 The following treatment covers all species found in the Top End, only C. nudiuscula not being recorded from the D.R. Taxonomic references: Quirk et al. (1983); Jones (1988); Chambers & Farrant (1991, 1998b); Tindale & Roy (2002). 1 Pinnules with long, curling, weak hairs <strong>and</strong> <strong>of</strong>ten their surfaces manifestly woolly ............................................................................................................................. C. brownii 1: Pinnules glabrous or hairy, but if hairy never with long, weak, curling hairs <strong>and</strong> the pinnule surface never obscured by the indumentum ...................... 2 2 Pinnules (at least the terminal <strong>and</strong> near terminal pinnules in a pinna) narrowly oblong to linear in outline <strong>and</strong> more than 5 times longer than wide .. 3 2: Pinnules never linear <strong>and</strong> less than 5 times longer than wide ............................... 4 3 Pinnules less than 10 times as long as wide; lamina 3-pinnate or 4-pinnatifid at base ............................................................................................................................. C. caudata 3: Pinnules always or mostly at least 10 times longer than wide; lamina 2-pinnate at base or sometimes trifoliolate pinnules at base ................................. C. nitida 4 Pinnules membranous <strong>and</strong> the minor veins conspicuous; lamina 1–3-pinnate at base ............................................................................................................................. C. pumilio 4: Pinnules thick <strong>and</strong> minor veins generally indistinct; lamina 2–4-pinnate at base ............................................................................................................................. 5 5 Lamina ovate or triangular, 2-pinnate or 3-pinnatifid at base; pinnule surfaces discolorous; midribs <strong>of</strong> primary pinnae dark for part <strong>of</strong> their length ..................................................................................................................... C. praetermissa 5: Lamina linear, ovate or triangular, 2–5-pinnate or 5-pinnatifid, if ovate or triangular then 3- or 4-pinnate or 5-pinnatifid at base; lower pinnules usually concolorous; midribs <strong>of</strong> primary pinnae usually not dark ..................................... 6 6 Pinnules with the upper surface completely glabrous, the lower glabrous or almost so ........................................................................................................................ C. sieberi 6: Pinnules with the upper surface <strong>and</strong>/or the margins sparsely to moderately hairy, the lower sparsely to densely hairy .................................................................. 7 7 Pinnae with straight, stiff, pointed hairs ................................................................... C. fragillima 7: Pinnae hairs not as above ............................................................................................ 8 8 Lamina 2- or rarely 3-pinnate at base; longest hairs on upper surface <strong>of</strong> pinnae c. 0.5–0.6 mm long ........................................................................................... C. nudiuscula 8: Lamina 3- or 4-pinnate at the base; longest hairs on upper surface <strong>of</strong> pinnae c. 0.3 mm long .................................................................................................. 9 9 Hairs on the rachises, rachillas <strong>and</strong> midribs on the lower surface <strong>of</strong> the pinnules moderately dense; pinnules usually not well separated from each other <strong>and</strong> their apices tending to be obtuse ............................................................. C. contigua 9: Hairs on the rachises, rachillas <strong>and</strong> the midribs on the lower surface <strong>of</strong> the pinnules sparse; pinnae usually well separated from each other <strong>and</strong> their apices tending to be acute ........................................................................................... C. tenuifolia C. brownii (Desv.) Domin Gymnogramma brownii Kuhn Fronds to 30 cm long, stipe <strong>and</strong> rachis dark reddish-brown, with a scattered to dense indumentum <strong>of</strong> unbranched, uniseriate, multiseptate, apically acute, whitish or pale brown hairs to c. 4 mm long <strong>and</strong> some long, brownish, scalelike hairs on the rachis. Lamina ovate to lanceolate or narrowly elliptic, 3.5–18 cm long, 2.5–7 cm wide, (1-) 2- (3-) pinnate at base, but 2-pinnate formost <strong>of</strong> its length. Largest pinnae ovate to lanceolate, to 2.5 cm long; pinnules apically FDRV1 March 2011