s.l., spikelets are distichously
organized, which can be considered as a synapomotphy, though a number of reversals to terete spikelets with spiral glume arrangement are recorded (Muasya et al., 2001a);
arranged in one plan; elongated spatulate leaves with attenuated Taxonomic Epithet Key morphological rank characters base, cryptostomata thin to large, mostly aligned on each side of the midrib, and dentate margins; vesicles supported by a long pedicel, spherical to obovoid, smooth or with a short mutro, a foliar appendage or crown, or differentiated into phyllocysts; receptacles mostly bisexual, with serrate margins and arranged in dense cymose glomerules.
A new glume originates spirally to distichously
, immediately under the spikelet apex, as a rim-like structure (Fig.
Glumes are spirally or distichously
arranged in the spikelets, apart from some reduced species in which the arrangement is obscure.
1.5 cm wide, with a sterile base 1-5 cm long bearing a single sterile bract at the base, with sterile bracts at the apex, slightly recurved; rachis green, strongly geniculate, lepidote, laxly and distichously
8 to 12-flowered; floral bracts ca.
Leaves 10-15, distichously
arranged or nearly so, coriaceous; sheaths distinctly broader than the blades, the older ones forming a subglobose base, 3.4- x 4-5 cm, suborbicular-ovate, dark castaneous, lepidote; blades sublinear-attenuate, distinctly U-canaliculate, suberect-arcuate, 25-40 cm long, ca.
Spikes arching-pendulous, laxly distichously
3-8-flowered, 1-3.5 cm long, 0.6 cm wide, rachis exposed by the bracts, flexuous to geniculate, subterete, internodes 3-5 mm, green, lepidote; stipes 1-1.5 cm long, without sterile bracts, subterete; floralbracts 3-5 mm long, 4,5 mm wide, ovate, apiculate and the apex incurved, in the upper part carinate, densely cinereous-lepidote, much shorter than the sepals, remote to each other, cinereous-green.
60 mm long (with extended petals), odorless, erect at anthesis, sessile, those of the simple part of the inflorescence densely and polystichously arranged, those of the fascicles distichously
and densely to subdensely arranged; sepals obovate, strongly asymmetrical with the lateral membranaceous, rounded wing distinctly surpassing the midnerve, green, densely white-lepidote-farinose to glabrescent, ecarinate, thickly coriaceous mainly toward the base except for the membranaceous wing, 22-23 x 10-11 mm, connate at base for ca.