Indocalamus emeiensis C. D. Chu et C. S. Chao (1980: 24)

Gao, Li-Qin, Li, Yong-Long, Guo, Chun-Ce, Yang, Guang-Yao & Zhang, Wen-Gen, 2022, Indocalamus chongzhouensis (Poaceae: Bambusoideae), a new synonym of I. emeiensis: evidence from morphology and complete chloroplast genome data, Phytotaxa 542 (1), pp. 53-63 : 60-61

Indocalamus emeiensis C. D. Chu et C. S. Chao (1980: 24) ( Fig. 6 )

Type: — China, Sichuan: Leshan, E’mei Moutain, Hongchunping , elev. 1000–1200 m, 7 June 1976, C . D. Chu & C. S . Chao 76037 (lectotype, designated here, NF3001692 !; isolectotypes, NF!, N!, photo PE!) = Indocalamus chongzhouensis Yi et Yang (2004: 13) , syn. nov. Type : — China, Sichuan, Chongzhou, Sanlang Town, Chayuan Village , elev. 850–1100 m, 17 Sep. 2003, T. P . Yi 03014 (Syntypes: SIFS!) .

Revised description:— Rhizomes leptomorph. Culms 1.5–4.2 m tall, 0.7–1.5 cm in diameter, hollow; internodes terete, 20–38 cm long, young culm reddish-brown strigose, infranodal region white powdery, glabrescent when old; wall 1.5–3.0 mm thick; supranodal ridge prominently raised; intranodes 5–15 mm long. Culm sheaths tardily deciduous, oblong, thinly leathery or papery, 1/2 as long as internodes, densely reddish-brown strigose and purple-spotted, margin densely reddish-brown ciliate; auricles falcate, 7–15 mm long, 3–4 mm wide; oral setae radiate, 1.5–2 cm long; ligules 1–3 mm tall, truncate, margin densely ciliate; blades recurved, lanceolate. Foliage leaves 5 or 6 per ultimate branch; sheath sparsely puberulent initially, glabrescent, margin densely ciliate; auricles falcate, 1–2 cm long, 2–3 mm wide; oral setae radiate, 1.5–2.5 cm long; ligules truncate, 2–4 mm tall, margin densely ciliate; blades oblong-lanceolate, 33.0–42.5 × 5.9–9.5 cm, both surfaces glabrous, longitudinal veins 10–15 pairs, base cuneate, apex long-acuminate, margin entire. Inflorescence unknown.

Distribution and habitat: — Indocalamus emeiensis is endemic to Sichuan Province, China ( Fig. 7 ) with three distributed localities found so far, i.e., Muping, Sanlang and Emei Mountain. It usually grows in the understory of evergreen broad-leaved forests or dank valleys at elevations of 850–1200 m.

Phenology: —New shoots from August to October. Flowering unknown.

Additional specimens examined: — CHINA. Sichuan: Chongzhou, Sanlang, 13 Jul. 2018, Gao et al., SCCD1801 ( JXAU); ibid., 18 Oct. 2019, Gao et al., SCCD1901 ( JXAU); ibid., 10 Aug. 2020, Gao et al., SCCD2001 ( JXAU); Leshan, E’mei Mountain, Hongchunping, 28 Sep. 1997, T. P . Yi s.n. ( SIFS); ibid., 20 Oct. 1990, T. P . Yi 90130 ( SIFS); ibid., 15 Jul. 2018, Gao et al., SCEM1801 ( JXAU); ibid., 19 Oct. 2019, Gao et al., SCEM190 ( JXAU); ibid., 11 Aug. 2020, Gao et al., SCEM2001 ( JXAU); Ya’an, Baoxing, Muping, 8 Jul. 1998, T. P . Yi 98555 ( SIFS) .

Figures

FIGURE 6. Indocalamus emeiensis. A and B. Habitat and habit; C and D. Rhizome and new shoot; E. Apex of new shoot, showing sheath auricle, oral setae and ligule; F. Infranodal region of young culm; G–J. Culm sheath; K. Part of ultimate leafy branch, showing leaf auricle and oral setae; L. Branching node; M. Longitudinal section of branching node. (Scale bars=1 m [A & B]; 1 cm [C–M]).

FIGURE 7. Geographical distribution of Indocalamus emeiensis (red pentacles).