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菌物学报

jwxt@im.ac.cn 15 May 2014, 33(3): 1-4
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简报 Short communication DOI: 10.13346/j.mycosystema.130259


Received: 27-12-2012, accepted: 01-03-2013

Xylaria byttneriae sp. nov. from Yunnan Province in China
HUANG Gu1, 2 GUO Lin2* LIU Na1
1Henan University of Technology, College of Biological Engineering, Henan, Zhengzhou 450001, China
2State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China



Abstract: A new species, Xylaria byttneriae, is described from China. It was collected on fallen fruits of Byttneria pilosa
and Byttneria integrifolia (Sterculiaceae) in Yunnan Province. Stromata are cylindrical with a sterile apex and hairless
stipe.
Key words: Ascomycota, pyrenomycetous fungi, Xylariaceae, taxonomy

刺果藤炭角菌新种
黄谷 1, 2 郭林 2* 刘娜 1
1 河南工业大学生物工程学院 河南 郑州 450001
2 中国科学院微生物研究所真菌学国家重点实验室 北京 100101

摘 要：报道了采自云南的刺果藤炭角菌新种 Xylaria byttneriae，该种主要特点是生在掉落的粗毛刺果藤 Byttneria
pilosa 和全缘刺果藤 Byttneria integrifolia（梧桐科 Sterculiaceae）果实上。子座圆柱形，顶端有不育尖，表面可见
子囊壳外观突起，柄部光滑。
关键词：子囊菌门，核菌，炭角菌科，分类

INTRODUCTION
Xishuangbanna of Yunnan Province is lo-
cated entirely in the tropics. The climate is cha-
racterized by high temperature throughout the
year, plenty of rainfall in summer and autumn. It
is provided with a greatly favorable condition for
fungal species diversity. Some new species of
Xylaria have been published there (Ma et al.
2011, 2012). During a mycological expedition to
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the region in October of 2013, many specimens
of the genus Xylaria have been collected by the
authors. Among them, an additional new Xylaria
species is described.
1 MATERIALS AND METHODS
The specimens are cut by cryomicrotome
(Leica CM1950) under the frozen state –20℃.
Microscopic observation and measurements
were made from slide preparations mounted in
water and Melzer’s reagent. The observation
and photographs of the asci, ascal apical ring
and ascospores were taken by using Zeiss mi-
croscope (Axioskop 2 plus). The photograph of
stromata was taken with Sony camera (NEX-7).
2 DESCRIPTIONS
Xylaria byttneriae G. Huang, L. Guo & N. Liu, sp.
nov. Fig. 1
Fungal Name FN 570090
Diagnosis: differs from Xylaria culleniae by
its smaller ascospores and hairless surface of
stromata.
Stromata cylindrical, unbranched or occa-
sionally branched, with a sterile apex, 2–4cm
total length, 0.8–1.5mm diam.; 0.9–2.5cm long
at stipes; surface black, with conspicuous pe-
rithecial mounds, finely split by longitudinal
cracks; interior white. Perithecia globose or sub-
globose, 500–600μm diam. Ostioles papillate.
Asci with eight ascospores arranged in uniseriate
manner, cylindrical, 75–110μm total length,
3–4.5μm broad, the spore–bearing parts
42–55μm long, with an apical ring staining blue
in Melzer’s iodine reagent, inverted hat–shaped,
1.5–2μm high, 0.8–1.5μm broad. Ascospores
brown, ellipsoid-inequilateral, smooth, (6.5–)7–
8.5(–9)×3–4.5μm, with a straight germ slit
spore-length on concave side.
Etymology: The epithet refers to the
substrate plant genus that the fungus inhabits.
Type: China, Yunnan Province, Mengla
County, Xishuangbanna Tropical Botanical Gar-
den, Chinese Academy of Sciences; alt. 570m, on
fallen fruits of Byttneria pilosa; 16.X.2013, G.
Huang, L. Guo & W. Li 206, HMAS 269872 (holo-
type); Jinghong City, Guanping Village, alt. 850m,
on fallen fruits of Byttneria integrifolia;
18.X.2013, G. Huang, L. Guo & W. Li 273, HMAS
269873 (paratype).
3 DISCUSSION
Fruit- and seed-inhabiting species of Xylaria
seem to be highly host-specific (Rogers 1979;
Rogers et al. 1992, 2002; Whalley 1985, 1987).
Xylaria byttneriae is similar to Xylaria culleniae
Berk. & Broome, but the latter has longer
stromata (up to 7cm), tomentose surface of
stromata, slightly larger ascospores,
8.5–9.5×3.5–4.5μm and mostly on fruits of Le-
guminoseae (Rogers 1979; Rogers et al. 1988),
while Xylaria byttneriae has shorter stromata
(up to 2.5cm), hairless surface of stromata,
slightly smaller ascospores, (6.5–)7–8.5(–9)×3–
4.5μm and on fruits of Sterculiaceae.
Xy la r ia b y t t n er ia e d i f fe rs f ro m X .
ianthinovelutina (Mont.) Fr. in the latter having
longer stromata (up to 10cm), tomentose
surface of stromata, la rger ascospores ,
9–12×3.5–4.5μm and mostly on fruits of Legu-

HUANG Gu et al. / Xylaria byttneriae sp. nov. from Yunnan Province in China






菌物学报
3

minosae (Rogers 1979; Rogers et al. 1988). Xyla-
ria byttneriae differs from X. magnoliae J.D.


Fig. 1 Xylaria byttneriae (HMAS 269872, holotype). A: Stromata on fruit; B: Surface of stromata; C, D: Sections of perithe-
cia; E, F: Asci and ascospores.

Rogers in the latter having longer stromata (up
to 12cm), navicular-crescentic, yellowish and
larger ascospores, 11–15(–17) × 3–5(–6)μm,
with obscure germ slits, and on fruits of the ge-

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nus Magnolia (Magnoliaceae) (Rogers 1979).

Acknowledgements: The authors would like to express
their deep thanks to Prof. Li Zhen-Yu (Institute of Botany,
Chinese Academy of Sciences) for identifying the host
plants, to Mr. Du Ying-Shan for giving help of specimen
collections.
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