2n = 28

2n = 28

Markedly stoloniferous perennial, with bright green, rarely glaucous leaves, tending to lie along the ground, and erect or geniculate and ascending, very slender culms to 50 cm tall; new shoots extravaginal; laminae persistent. Sheaths pale green to light brown, membranous, mainly smooth but ciliate- scabrous near hyaline margin, occasionally on keel, and above near ligule; ligule 0.7-1.5 mm long, entire, smooth across obtuse top, closely, shortly, ciliate-scabrous abaxially; lamina (5.5)-10-17cm × 1-2 mm, flat, soft, abaxially glabrous, adaxially with very minute fine hairs, margins ciliate near ligule, midrib minutely scabrous especially near filiform, acuminate tip. Culms 10-25-(36) cm tall, very minutely scabrous just below panicle or rarely entirely smooth. Panicle 10-25 cm long, lax and delicate; rachis very minutely, sparsely scabrous, branchlets finely scabrous, spreading, with few spikelets at tip. Spikelets 3.5-5-(6) mm long, (2)-3- 4-(5)-flowered, green, rarely purplish. Glumes unequal; lower glume 0.8-1.5 mm long, 1-nerved, narrow-lanceolate, subobtuse, upper 1.5-2 mm long, 3-nerved, elliptic-lanceolate, obtuse, scabrous along midnerve. Lemma 2-3 mm long, 5-nerved, narrow-lanceolate, subobtuse, nerves minutely scabrous above, lateral nerves occasionally with long hairs near base, internerves smooth and glabrous. Palea 1.5-2 mm long, ± ciliate between ciliate-scabrous keels. Lodicules 0.2-0.4 mm long. Callus glabrous, or often with a few fine long hairs. Rachilla 0.5-1 mm long, glabrous or with a few hairs. Anthers 0.3-0.5 mm long. Caryopsis c. 1 × 0.3 mm. 2n = 28 (also for plants recorded as P. matthewsii var. minor and as P. imbecilla with footnote equating it to P. matthewsii var. tenuis). Endemic

Markedly stoloniferous perennial, with bright green, rarely glaucous leaves, tending to lie along the ground, and very slender culms erect or geniculate and ascending, to 50 cm; branching extravaginal; leaf-blades persistent. Leaf-sheath pale green to light brown, membranous, mainly glabrous but with minute hairs and prickle-teeth near hyaline margin, occasionally near ligules and on keel. Ligule 0.7-1.5 mm, apically glabrous, entire, rounded, abaxially with dense, minute hairs. Leaf-blade (5.5)-10-17 cm × 1-2 mm, flat, soft, abaxially glabrous, adaxially with very minute fine hairs; margins ciliate near ligule, midrib minutely scabrid especially near filiform, acuminate tip. Culm 10-25-(36) cm, internodes very minutely scabrid just below panicle or rarely smooth. Panicle 10-25 cm, lax and delicate; rachis very minutely, sparsely scabrid, branches finely scabrid, spreading, with few spikelets at tip. Spikelets 3.5-5-(6) mm, (2)-3-4-(5)-flowered, green, rarely purplish. Glumes unequal; lower 0.8-1.5 mm, 1-nerved, narrow-lanceolate, subobtuse, upper 1.5-2 mm, 3-nerved, elliptic-lanceolate, obtuse, midnerve scabrid. Lemma 2-3 mm, 5-nerved, narrow-lanceolate, subobtuse, nerves minutely scabrid above, lateral nerves occasionally with long hairs near base, internerves glabrous. Palea 1.5-2 mm, keels ciliate-scabrid, interkeel ± minutely hairy. Callus glabrous, or often with a few fine long hairs. Rachilla 0.5-1 mm, glabrous or with a few hairs. Lodicules 0.2-0.4 mm. Anthers 0.3-0.5 mm. Gynoecium: ovary 0.3-0.5 mm; stigma-styles 1.0-1.25 mm. Caryopsis c. 1 × 0.3 mm. 2n= 28. Plates 4D, 7B.