In the present study, we encountered, on surfaces of internodal tracheary elements that face carinal canals, a large number of crateriform
circular pits that lack pit membranes.
12 in number, suberect, coriaceous, forming a broadly crateriform rosette; sheaths oblong-elliptic, scarcely wider than blade, 30-35 x 17-18 cm, castaneous mainly abaxially, densely pale brown to whitish lepidote on both sides; blades sublinear, not narrowed at base, channeled at base, 120-160 x 11-13 cm wide, apex acuminate, ending in a stout blackish pungent spine ca.
Leaves 15-20 in number, coriaceous, forming a broad crateriform rosette; sheaths oblong-elliptic, 34-45 x 19-21 cm, dark castaneous and densely brown-lepidote on both sides; blades sublinear, suberectarcuate at anthesis, slightly if at all narrowed at base, 180-200 x 16-17 cm, green, nerved mainly at apex, abaxially densely and minutely white-lepidote, adaxially subdensely and inconspicuously white-lepidote, apex acuminate, ending in a dark, pungent spine, ca.
20 in number, rosulate, suberect-arcuate, coriaceous, forming a broadly crateriform
rosette at base; sheaths narrowly elliptic, 28-29 x 10.