Compilation
Aspidium truncatulum

Terrestrial; rhizome up to 2.5 cm in diameter, erect, forming a short woody caudex up to 20 cm high and 15 cm in diameter with attenuate subentire pale to dark brown rhizome-scales up to 2≈0.1 cm with a few filamentous marginal outgrowths. Fronds tufted, 0.7–2.1 m tall but up to 3.6 m long, arching, firmly herbaceous; stipe stramineous, up to 50 cm tall, grooved, set with a mixture of narrowly ovate to linear-lanceolate brown scales up to 3≈0.4 cm; lamina up to 147≈48 cm, oblong-ovate, 2-pinnate, not reduced at the base; pinnae in about 20–40 pairs up to 25≈4 cm, very narrowly oblong, acuminate, pinnatifid into up to 35(–40) pairs of dimidiate oblong-rhombic petiolate pinnules up to 2.5≈1 cm, the basiscopic margin entire, thickened, with between 1–5 septate, ± stiff bristles (1(–1.7)–2 cm long), the acroscopic margin crenate (fertile pinnules) to serrate (sterile pinnules), glabrous on both surfaces at maturity; rachis and secondary rachises stramineous with persistent pale-brown scales similar (but shorter) to those on the stipe. Sori 1–11 per pinnule, borne in a slight depression nearer the acroscopic margin than the midrib, ± massive, broadly elliptic, up to 2.5≈2 mm; indusium dark-brown with a paler border, with a very narrow elongate stalk, broadly elliptic, up to 3.5≈2 mm, entire. Fig. 8.