Festuca formosana Honda

Endemic to Taiwan, and only one record find in limestome areas in northeastern Taiwan.

This species appears to be close to Festuca arundinacea. Specimens have not been seen.

Culms 40 cm tall, 1 mm in diameter. Blade acuminate at both ends, 15 cm long. Panicle large, loose. spikelets 1-2-flowered, 8 mm long; glumes subcoraceous, scabrous on back and margins; the lower linear-lanceolate, 3 mm long, 1-nerved; the upper lanceolate, 3.5 mm long, 3-nerved; lemmas lanceolate, 7-7.5 mm long, 5-nerved; palea 6.5-7 mm long, linear-lanceolate, 2-keeled, minutely ciliate on the keels. Caryopsis 5 mm long, cylindrical; hilum linear.

Culms robust, (40–)150–200 cm tall. Leaf sheaths glabrous; auricles falcate; leaf blades flat, stiff, (15–)30–60 cm × 5–20 mm, margins scaberulous, finely acuminate; ligule 1.8–2.2 mm, truncate. Panicle large, effuse, 30–40 cm; branches ascending, paired, scabrid. Spikelets 8–10 mm; florets 1–2(–3), 3rd floret reduced; glumes glabrous; lower glume narrowly lanceolate, 2.2–2.8(–3.2) mm; upper glume broadly lanceolate, 3.5–4.5 mm; lemmas 8–9 mm, puberulent, awnless; palea keels ciliolate. Anthers 2.6–3 mm.

* Limestone areas. Taiwan.