Hooker = British botanist, associated with the Royal Botanic Gardens, Kew. W.J. Hooker was the director of Kew, died in 1865. His son, J.D., was the director at Kew after 1865, and presumably this species was called after him. The two Hookers were amongst the most influential systematic botanists of the 19th Century.
Vegetative parts: plants tufted, 0.2-0.8 m tall, basal diameter 0.05-0.15 m, crown diameter 0.3-0.6 m, compact, without spreading rhizomes or stolons. Fertile culms unbranched, round (not compressed), solid or with a small central cavity, smooth or finely rugulose, green or olivaceous, 0.2-0.8 m tall, diameter at base 0.7-1.2 mm, diameter at apex 0.5-1.2 mm. Branch axil indumentum absent. Clusters of sterile branches at the nodes of the fertile branches absent. Sheaths more than 1 per culm, dropping off, with an abscission line present, loosely convoluted, 15-30 mm long, margins entire, dark reddish-brown (maroon) with a glossy surface, upper 1/3 in colour and texture similar to the lower 2/3, apical margins coriaceous, like the rest of the body, hyaline shoulders absent, apex, excluding the membranous lobes, acute or obtuse. Sheath-mucro penicellate, straight and erect, 2-3 mm long. Males: male inflorescence with 11-20 spikelets or 21-50 spikelets, paniculate, 20-100 mm long, 8-15 mm wide. Male inflorescence spathes caducous, taller than spikelets, cartilaginous. Male spathellae inconspicuous or absent or conspicuous (conspicuous on some inflorescences, it seems to vary), 4-7 mm long. Male flowers in spikelets. Male spikelets erect on stiff pedicels or sessile, undifferentiated, apex undifferentiated, 3-3.5 mm, 1.8-2.2 mm, with 2-3 flowers, pedicels shorter than the spikelets or as long as the spikelets, flattened. Male bracts shorter than flowers, 1.5-2.2 mm long, ovate or orbicular, rounded or obtuse, cartilaginous, bract upper margin like body of bract, bract awn minute or absent. Male flower 2.7-3.2 mm long. Male tepals sepals and petals the same rigidity, cartilaginous, oblong or elliptical, inner tepals longer than outer tepals. Male outer lateral tepals conduplicate, glabrous. Anthers 1-1.5 mm long, included in the flowers. Females: female inflorescence interrupted or linear, 15-100 mm long, 10-15 mm wide, with 2-5 spikelets or 6-10 spikelets or 11-20 spikelets or 21-50 spikelets. Female spathes longer than the spikelets, not obscuring spikelet or obscuring spikelet, persistent or caducous, cartilaginous. Female spathellae inconspicuous or absent. Female spikelet pedicel sparsely branching, elliptical, apex obtuse or acute, 4-5 mm long, with 1 flowers, with 1 sterile bracts. Female bracts shorter than flowers, erect, 2.5-3.5 mm long, oblong or ovate or obovate, rounded or obtuse or acute, bony or coriaceous, apical margin like rest of bract, same as body of bract, margins entire, awn minute or absent or less than half as long as the bract body. Female flower 3-4 mm long, without a fleshy pedicel, six tepals. Female tepals bony, glabrous and smooth, midrib flush with the tepal body, apices acute, inner whorl longer than outer. Female outer lateral tepals like other tepals, hidden by bracts, or bracts are shorter than flowers, 2.8-3.3 mm long. Female odd outer tepal oblong, 2.8-3.3 mm long. Female inner tepals ovate, 3-4 mm long. Staminodes present. Styles feathery, white, 3. Style bases free. Ovary with 3 locules, dehiscent. Fruit: seed (1.44-)1.59(-1.72) mm long, (0.8-)0.92(-1) mm in diameter, shape in side view elliptical, shape in diameter triangular in cross section, grey.