Two New Species of <i>Yushania</i> Keng f.(Poaceae) from Northwestern Yunnan in China

YI Tong-pei; YANG Lin

doi:10.16779/j.cnki.1003-5508.2016.01.004

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Volume 37 Issue 1

Nov. 2019

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Article Navigation > Journal of Sichuan Forestry Science and Technology > 2016 > 37(1): 23-26

YI Tong-pei, YANG Lin. Two New Species of Yushania Keng f.(Poaceae) from Northwestern Yunnan in China[J]. Journal of Sichuan Forestry Science and Technology, 2016, 37(1): 23-26. doi: 10.16779/j.cnki.1003-5508.2016.01.004

Citation:

YI Tong-pei, YANG Lin. Two New Species of Yushania Keng f.(Poaceae) from Northwestern Yunnan in China[J]. Journal of Sichuan Forestry Science and Technology, 2016, 37(1): 23-26. doi: 10.16779/j.cnki.1003-5508.2016.01.004

Two New Species of Yushania Keng f.(Poaceae) from Northwestern Yunnan in China

doi: 10.16779/j.cnki.1003-5508.2016.01.004

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Dujiangyan Campus, Sichuan Agricultural University, Dujiangyan 611830

Received Date: 2015-11-09

Abstract

In this paper two new species of Yushania Keng f.are reported from Northwestern Yunnan.Yushnia habaensis Yi et L.Yang is similar to Y.bojieana Yi,but taller culms,4~7 m high,1.5~2 (2.5) cm diam.,internodes complanate or short longitudinal ditch on base a side of ramification,obviously longitudinal bridles,solid or subsolid,spongioplasm medullary and rigidity by drying;culm-sheaths culm sheath as long as internodes (length over 1/3 of internode),a few leaves,2~4 per ultimate branch,narrower blade,5~6.5 (10) mm broad,secondary veins 2~3 paired.Yushania gongshanensis Yi et L.Yang seperates from Y.flexa Yi by rhizome neck of thicker,to 2 cm diam,internodes to 2.5 (3) cm long;shorter internodes of culms,20~22 (26) cm long,hollow,longer than internodes,back surface sparse tuberculate setose;shorter leaf-sheath,(1.8) 2.2~3.5 cm,narrower blades,(5) 6.5~10 mm wide.
- Yushania Keng f.;
- Y.habaensis Yi et L.Yang;
- Y.gongshanensis Yi et L.Yang;
- New species;
- Yunnan
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沈阳化工大学材料科学与工程学院沈阳 110142

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Two New Species of Yushania Keng f.(Poaceae) from Northwestern Yunnan in China

doi: 10.16779/j.cnki.1003-5508.2016.01.004

Dujiangyan Campus, Sichuan Agricultural University, Dujiangyan 611830

Received Date: 2015-11-09

Key words:

Abstract: In this paper two new species of Yushania Keng f.are reported from Northwestern Yunnan.Yushnia habaensis Yi et L.Yang is similar to Y.bojieana Yi,but taller culms,4~7 m high,1.5~2 (2.5) cm diam.,internodes complanate or short longitudinal ditch on base a side of ramification,obviously longitudinal bridles,solid or subsolid,spongioplasm medullary and rigidity by drying;culm-sheaths culm sheath as long as internodes (length over 1/3 of internode),a few leaves,2~4 per ultimate branch,narrower blade,5~6.5 (10) mm broad,secondary veins 2~3 paired.Yushania gongshanensis Yi et L.Yang seperates from Y.flexa Yi by rhizome neck of thicker,to 2 cm diam,internodes to 2.5 (3) cm long;shorter internodes of culms,20~22 (26) cm long,hollow,longer than internodes,back surface sparse tuberculate setose;shorter leaf-sheath,(1.8) 2.2~3.5 cm,narrower blades,(5) 6.5~10 mm wide.