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FOC | Family List | FOC Vol. 22 | Poaceae | Arundinella

18. Arundinella pubescens Merrill & Hackel, Philipp. J. Sci. 2: 419. 1907.

毛野古草 mao ye gu cao

Arundinella caespitosa Janowski; A. filiformis Janowski; A. hispida (Humboldt & Bonpland ex Willdenow) Kuntze subsp. humilior (Hackel) Hackel; A. humilior (Hackel) Jansen.

Perennial forming small dense tuft, rhizomes absent. Culms erect, slender, 15–35 cm tall, ca. 1 mm in diam., internodes glabrous or thinly hirsute upward, 4–6-noded below middle, nodes bearded. Leaves mainly basal; leaf sheaths longer than internodes, glabrous to hirsute, margins ciliate, bearded at mouth; leaf blades linear or often inrolled, pale green, stiff, 6–16 cm × 2–6 mm, tuberculate-hirsute on both surfaces or glabrous, apex finely acute; ligule ca. 0.3 mm. Panicle open or loosely contracted, narrowly oblong to lanceolate in outline, 12–30 cm; central axis scabrid or sparingly pilose; branches erect to spreading, 1.5–4 cm, mostly single or paired; pedicels smooth or scaberulous. Spikelets 3.5–4.5 mm, greenish or purplish; glumes glabrous; lower glume 2.3–2.5 mm, 3–5-veined, scabrid along veins; upper glume as long as spikelet, 5-veined; lower floret staminate, longer than lower glume; upper floret 2–2.2 mm, lemma apex 2-denticulate, awned; awn geniculate with brown twisted column, 3–6 mm; callus hairs 1/4 length of lemma. Fl. and fr. Apr.

Shady rock fissures along river banks. Taiwan [Philippines].


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