verticellata (L.) = whorled. Referring to the branches, appearing in poorly defined whorls at each node.
WCM Protologue Reference:
(Steud.) Mast., J. Linn. Soc., Bot. 8: 227 (1865)
Vegetative parts: plants clumped or tufted, 1–2.4 m tall, basal diameter 0.5–1 m, crown diameter 0.5–1.5 m, compact, without spreading rhizomes or stolons. Fertile culms branching or branches whorled at each node, round (not compressed), solid or with a small central cavity, smooth or finely rugulose or finely warty (fertile branches coming off the main culm are usually papillose while the main culmis smooth), green or olivaceous, 0.5–2 m tall, diameter at base 0.7–1.4 mm (refers only to the sidebranches that come off in 'whorls'around the main culm), diameter at apex 0.5–6 mm (this range refers to the fertile sidebranches and the thick main culm). Branch axil indumentum absent. Clusters of sterile branches at the nodes of the fertile branches absent. Sheaths more than 1 per culm, persistent, with no abscission line, closely convoluted or loosely convoluted (loose around main culm and tighter around side branches), 5–25 mm long (includes small sheaths on sidebranches and large sheaths on the main culm), reddish to dark-brown with fine tan speckles, upper 1/3 in colour and texture similar to the lower 2/3, apical margins coriaceous, like the rest of the body or narrowly membranous, hyaline shoulders tall, acute, apex, excluding the membranous lobes, acute. Sheath-mucro penicellate, straight and erect or recurved, 7–18 mm long. Males: male inflorescence with 2–5 spikelets or 6–10 spikelets or 11–20 spikelets, racemose or paniculate, 10–50 mm long, 3–8 mm wide. Male inflorescence spathes persistent, shorter than spikelets (flexible and relatively thin, though not membranous), chartaceous. Male spathellae inconspicuous or absent. Male flowers in spikelets. Male spikelets erect on stiff pedicels or sessile, oblong or elliptical or ovate, at least some curved, apex acute or undifferentiated, 5–15 mm, 1–1.8 mm, with 5–25 flowers, pedicels absent ie spikelets sessile or shorter than the spikelets, flattened. Male bracts taller than flowers, 2.3–4 mm long, oblong or elliptical, acute or acuminate, chartaceous, bract upper margin membranous, thinner texture than the body, bract awn minute or absent. Male flower 2.2–3 mm long. Male tepals sepals and petals the same rigidity, chartaceous, elliptical or ovate, inner and outer tepals the same length. Male outer lateral tepals conduplicate, keel sparsely villous. Anthers 1.5–1.8 mm long, exserted from the flowers. Females: female inflorescence interrupted or linear or racemose, 5–20 mm long, 2–8 mm wide, with 1 spikelet or 2–5 spikelets. Female spathes shorter than the spikelets, persistent, coriaceous or cartilaginous. Female spathellae inconspicuous or absent. Female spikelet sessile, elliptical or obovate or undifferentiated, apex truncate or rounded or acute or undifferentiated, 4–12 mm long, with 2–12 flowers, with 1–3 sterile bracts. Female bracts shorter than flowers or as tall as flowers or taller than flowers, erect, 3–5.5 mm long, oblong or orbicular, rounded or obtuse or apiculate, cartilaginous, apical margin like rest of bract or membranous, same as body of bract, awn minute or absent. Female flower 2.5–4.5 mm long, without a fleshy pedicel. Female tepals cartilaginous, keels of lateral sepals densely villous, midrib flush with the tepal body, apices rounded or acute, inner whorl longer than outer or inner whorl shorter than outer. Female outer lateral tepals conduplicate, 2.5–4.5 mm long. Female odd outer tepal ovate, 2.5–4 mm long. Female inner tepals ovate, 1.2–3.5 mm long. Staminodes absent. Styles feathery, white, 2. Style bases fused to form a pillar. Ovary with 2 locules, dehiscent. Fruit: seed (1.72–)1.89(–2) mm long, (1.64–)1.76(–1.92) mm in diameter, shape in side view elliptical, shape in diameter elliptical in cross section, translucent (yellowish-brown mottled seed colour shining through seed coat), smooth.