glomero (L.) = to form in a sphere. Referring to the globose female inflorescences.
WCM Protologue Reference:
Kunth, Enum. Pl. 3: 469 (1841)
Vegetative parts: plants tufted, 0.8–1.5 m tall, basal diameter 0.2–0.5 m, crown diameter 0.5–1 m, with rhizomes. Rhizome spreading, unbranched or sparsely branched, culms evenly spaced, 2.5–3.5 mm in diam., culms 3–7 mm apart. Fertile culms unbranched, compressed, solid or with a small central cavity, smooth, green, 0.8–1.5 m tall, diameter at base 1.5–2.5 mm, diameter at apex 1–1.4 mm. Clusters of sterile branches at the nodes of the fertile branches absent. Sheaths persistent, with no abscission line, closely convoluted or loosely convoluted, 40–100 mm long, margins entire, green when young, turning tan with age, upper 1/3 in colour and texture similar to the lower 2/3, apical margins narrowly membranous, hyaline shoulders absent, apex, excluding the membranous lobes, acute. Sheath-mucro awl- or needleshaped (very strongly developed and persistent), straight and erect, 5–25 mm long, very distinctive, with long terete mucro, the whole starting green, and persisting. Males: male inflorescence with 50–100 spikelets or 101–500 spikelets, paniculate or globose, 20–40 mm long, 5–15 mm wide. Male inflorescence spathes persistent, taller than spikelets, chartaceous, Past flowering, so material not adequate. Male flowers in spikelets. Male spikelets erect on stiff pedicels or sessile, oblong or ovate, apex rounded or obtuse, 3–4 mm, 1.5–2 mm, with 5–15 flowers, pedicels shorter than the spikelets, terete or angular. Male bracts taller than flowers, 1.5–2 mm long, ovate, acuminate, margins entire or shallowly toothed, chartaceous, bract upper margin like body of bract, bract awn minute or absent or less than half as long as the bract body, body pale brown, margins and acuminate apex white, more or less ciliate. Male flower 1.4–1.8 mm long. Male tepals sepals and petals the same rigidity, chartaceous, ovate, inner tepals longer than outer tepals. Male outer lateral tepals as other tepals or conduplicate, glabrous. Anthers 0.7–1 mm long, included in the flowers. Females: female inflorescence globose (Spikelets very densely aggregated), 10–35 mm long, 5–15 mm wide, with 51–100 spikelets or 101–500 spikelets. Female spathes longer than the spikelets, not obscuring spikelet, persistent, chartaceous. Female spathellae inconspicuous or absent. Female spikelet pedicel sparsely branching, ovate or undifferentiated, apex rounded or obtuse, 4–5 mm long, with 3–6 flowers, with 0 sterile bracts. Female bracts taller than flowers, erect, 4–5 mm long, ovate, acuminate, chartaceous or cartilaginous, apical margin like rest of bract, paler than body of bract, awn minute or absent. Female flower 1.8–2.5 mm long, without a fleshy pedicel, six tepals. Female tepals chartaceous, scabrid all over, at least as tall as nut, wrapped around it and obscuring the surface or smaller than nut and not obscuring the nut surface, midrib raised, margins ciliate, apices acuminate, inner and outer whorls the same length. Female outer lateral tepals like other tepals or conduplicate, hidden by bracts, or bracts are shorter than flowers, 2–2.5 mm long. Female odd outer tepal oblong or ovate, 2–2.5 mm long. Female inner tepals oblong or ovate, 2–2.5 mm long. Staminodes present. Styles feathery, white, 3. Style bases free. Ovary with 1 locule, indehiscent. Fruit: indehiscent fruits with a softer ovary wall. Perianth presence on fruits persistent, papery to leathery, not winged. Nut apex smooth, without a distinct cap, wall smooth, 1.5–2 mm long, 1.1–1.2 mm diam., shape in side view ovate, shape in top view triangular in cross section, black, mode of seed release for nutted plants unknown. Elaiosome absent.