Chusquea subg. Platonia

Guerreiro, Carolina, Olivera, J. José Alegría, Rúgolo De Agrasar, Ma. E., Beck, Stephan G. & Vega, Andrea S., 2014, Two new species and synopsis of Chusquea subg. Platonia (Poaceae: Bambusoideae: Chusqueinae) in Bolivia and a new record for Peru, Phytotaxa 183 (4), pp. 224-238 : 233

Key to the species of Chusquea subg. Platonia from Bolivia based on reproductive characters

1. Spikelets 9.5–11.5 mm long, including awns. Glumes with long awns; awns much longer than the spikelet body. Lower glume 2–3(–4) times the length of the spikelet body..................................................................................................... C. laegaardii

- Spikelets 3.5–7.5 mm, including awns. Glumes scalelike, mucronate or awned; if awned, ¼–shortly exceeding the length of the spikelet. Lower glume ¼–equal to the length of the spikelet.............................................................................................................2

2. Synflorescence (21–)30–47(–60) × 7–10 cm. Lower glume enerved or 1-nerved. Upper glume 1- or 3-nerved. Fertile floret adaxially pubescent and abaxially glabrous or scabrous. Fertile lemma 3.2–3.7 mm long. Palea 3–3.7 mm long. Anthers 1.5–2 mm ............................................................................................................................................................................... C. asymmetrica

- Synflorescence 50–88 × 26–56 cm. Lower glume 1- or 3-nerved. Upper glume 3-nerved. Fertile floret glabrous or scabrous toward the apex in both surfaces. Fertile lemma 4.3–6 mm long. Palea 4.3–5.7 mm long. Anthers 1.7–2.5 mm .........................................3

3. Synflorescence 85–87.5 × 26–32 cm. Spikelets (5–)5.2–6.7(–7.5) × 1.7–2 mm, including awns. Lower glume 1.2–2.4 mm long, variable in length, generally ¼–½ the length of the spikelet, 3-nerved, ovate, apex acute, mucronate or abruptly acuminate. Upper glume 4.5–6.7(–8) mm long, variable in length, equal to subequal to the length of the spikelet body, exceptionally shortly exceeding the spikelet, abruptly acuminate. Anthers 2–2.5 mm long. Stigmas plumose............................................................... C. parodii

- Synflorescence (50–)55–88 × 47–56 cm. Spikelets (3.5–) 4–4.5(–5.1) × 2.5–4 mm including awns. Lower glume (2–) 3–4.5 mm long, ca. ½ or subequal to the length of the spikelet, 1-nerved, base ovate, abruptly acuminate, short awn ca. 1 mm long. Upper glume (2.5–) 5–6 mm long, ca. ¾, equal or exceeding the length of the spikelet body, apex acuminate, the short awn ca. 1 mm long. Anthers 1.7–2 mm long. Stigmas bearded............................................................................................................... C. paucispiculata