Tenellae

Attigala, Lakshmi, Fuentes, Alfredo F. & Clark, Lynn G., 2017, Chusquea sect. Tenellae (Bambuseae, Bambusoideae, Poaceae), a taxonomic revision of a new section from South America, Phytotaxa 324 (3), pp. 239-265 : 246

Key to the species of C husquea sect. Tenellae based on reproductive and vegetative characters

1. Pedicels mostly 7–14 mm long; spikelets with glumes III and IV apiculate to more usually awn-tipped and lemmas subulate to awned; synflorescence branches and pedicels spreading, diffuse ................................................................................. C. fasciculata

- Pedicels 0.4–4 mm long; spikelets with glumes III and IV and lemmas acute to mucronate; synflorescence branches and pedicels appressed to the rachis.......................................................................................................................................................................2.

2. Synflorescences 5–10 cm long; inner ligule of the foliage leaf 3.5–40 mm long; eastern Brazil in the states of Minas Gerais, Rio de Janeiro, Santa Catarina and São Paulo .................................................................................................................... C. tenuiglumis

- Synflorescences 1.5–6.5 cm long; inner ligule of the foliage leaf 0.2–7 mm long; Argentina, Bolivia, Brazil, Paraguay and Uruguay...................................................................................................................................................................................................3.

3. Glumes III and IV 1/3–1/2 the spikelet length; foliage leaf blade L:W = 2.9–5.6, ovate to ovate-lanceolate, base asymmetrical, sometimes strongly so; western Bolivia........................................................................................................................... C. ovatifolia

- Glumes III and IV (1/3–) 2/5–2/3 the spikelet length; foliage leaf blade L:W = (3.8–) 5–14.2, ovate-lanceolate to lanceolate, the base + symmetrical; Argentina, eastern Bolivia, Brazil, Paraguay and Uruguay..............................................................................4.

4. Nodal line dipping markedly below the bud/branch complement; foliage leaf blades 4–9.4 (–12) (x =7.1) cm long, 0.5–1.5 (–1.8) (x =0.9) cm wide, abaxially glabrous with a few sparse hairs along the midrib at the base (rarely entirely pilose); subsidiary branches 20–50 per node; culm leaf sheaths abaxially glabrous or less commonly pubescent at the base and finely appressed-pubescent above (rarely hispid), juncture of the sheath and girdle glabrous .................................................................. C. ramosissima

- Nodal line dipping slightly below the bud/branch complement; foliage leaf blades 4.9–22.8 (x =11.2) cm long, 0.6–4.1 (x =1.7) cm wide, abaxially glabrous except pubescent on both sides of the midrib; subsidiary branches 7–20 per node; culm leaf sheaths abaxially pubescent-hirsute, the juncture of the sheath and girdle with a ring of cilia ........................................................ C. tenella