全 文 ：菌 物 系 统 22（4）：513~514, 2003
Mycosystema
A NEW SPECIES OF UROMYCES ATTACKING HELLEBORUS
THIBETANUS
*
ZHUANG Jian-Yun WEI Shu-Xia
(Systematic Mycology & Lichenology Laboratory, Institute of Microbiology, Academia Sinica, Beijing 100080)
ABSTRACT: A rust species seldom found on Helleborus of Ranunculaceae was described as new. The rust is
characterized by its colourless and echinulate urediniospores with indistinct germ pores and verrucose teliospores with
a colourless, low and small papilla over the germ pore. Its systematic relationships are discussed and its distinguishing
microscopic features are illustrated. Judging by the distribution of the host, the rust is inferred to be indigenous in the
central part of China.
KEY WORDS: rust fungus, Uromyces hellebori-thibetani, Ranunculaceae, systematic relationship, distribution

During the mycological exploration in Liupanshan Mountains, Ningxia Autonomous Region of northwest
China in September 2000, a rust fungus described here as a new species of Uromyces was collected. The rust is
characterized by its colourless and echinulate urediniospores with indistinct germ pores and verrucose teliospores
with a colourless, low and small papilla over the germ pore. Microscopic studies indicate that the rust deserves
taxonomic recognition and it is named here as Uromyces hellebori-thibetani.
Uromyces hellebori-thibetani J.Y. Zhuang & S.X. Wei sp. nov. Fig. 1, 2
Species a nobis non visa, urediniosporis sui hyalinis echinulatis et teliosporis verrucosis, comparanda cum
speciebus uromycetis in plantis Ranunculaceae antea descriptis.
Telia epiphylla, rotundata, 0.2~0.5 mm diam., sparsa vel aggregata, interdum in circulos disposita, primo
epidermide tecta dein ea fissa cinta vel semivelata, pulverulenta, obscure brunnea vel castaneo-brunnea;
urediniosporae immixtae globosae vel subglobosae,
25~30×22~25mm, membrana ca. 1~1.5mm crassa,
subtiliter echinulata, incolorata, pori germinationis
indistincti; teliosporae subglobosae, ellipsoideae,
obovatae, oblongae vel aliquantum irregulares, 20~30
(~35) × 15~20 (~23) mm, apice rotundatae, basi
rotundatae vel leviter attenuatae, membrana 1.5~2.5mm
crassa, apice non incrassata sed papillula minuta
humilique ca. 1.5~2mm alta hyalina aucta, verrucis
irregularibus distincte denseque obsita,
cinnamomeo-brunnea vel castaneo-brunnea, pedicellus
flavidus vel incoloratus, fragilis.
Hab. in foliis Hellebori thibetani Franch. in
montibus Liupanshan Ningxiae in Sina
boreali-occidentali, 1 IX 2000, leg. J.Y. Zhuang, no. 6546

Supported by the National Natural Science Foundation of China Grant Nos. 30230020 & 30270016
Received:2003-07-02

Fig. 1 Urediniospores (1) and teliospores (2) of Uromyces
hellebori-thibetani (HMAS 82839)
DOI:10.13346/j.mycosystema.2003.04.001
514 菌 物 系 统 22 卷
(HMAS 82839, holotypus hic designatus). Specimen in Herb. Mycol. Academiae Sinicae, Beijing servatum.
The rust seems more closely related to Uromyces jonesii Peck (1882; see also Arthur, 1934) on Ranunculus
from North America than to any other species of Uromyces parasitic on the plants belonging to the Ranunculaceae.
However, U. jonesii differs in lacking uredinia and urediniospores. Uromyces lycoctoni (Kalchbr.) Trotter (1908;
see also Arthur, 1934; Hiratsuka et al., 1992) on Aconitum widely distributed in the north temperate zone, as well
as U. ficariae (Alb. & Schwein.) Lév. (see Gäumann, 1959; Wilson & Henderson, 1966) and U. fischerianus
Mayor (1906; see also Sydow & Sydow, 1910; Gäumann, 1959) on Ranunculus from Europe have smooth
teliospores, unlike U. hellebori-thibetani.
Helleborus, the host genus, is a small genus about 20 species
now being known in the family Ranunculaceae, with a restricted
distribution in southeastern Europe and western Asia. H. thibetanus
Franch., the only known species in China, is endemic and confined to
the mountainous regions (alt. 1100~3700m) in central and western
provinces of the country (Fu & Hong, 2000). It is difficult to indicate
the range of the rust but we infer that it might be restricted in the
distribution areas of H. thibetanus.
ACKNOWLEDGMENT The authors wish to thank Prof. Y.C.
Wang for his critical reading of the manuscript and Ms. J.Y. Xie for
operating the scanning electron microscope.

[REFERENCES]
Arthur JC, 1934. Manual of the Rusts in United States and Canada. Hafner, New York. 1~438
Fu LG, Hong T (eds.), 2000. Higher Plants of China. Volume 3. Qingdao Publishing House. 1~757 (in Chinese)
Gäumann E, 1959. Die Rostpilze Mitteleuropas. Buchdruckerei Büchler & Co., Bern. 1~1407
Hiratsuka N, Sato S, Katsuya K, Kakishima M, Hiratsuka Y, Kaneko S, Ono Y, Sato T, Harada Y, Hiratsuka T, Nakayama K, 1992. The
Rust Flora of Japan. Tsukuba Shuppankai. 1~1205
Mayor E, 1906. Contribution à l’étude des Urédinées de la Suisse. Bull Herb Boissier II. Sér. 6: 1012~1016
Peck CH, 1882. New species of fungi. Bot Gaz 7: 43~45, 54~57
Sydow P, Sydow H, 1910. Monographia Uredinearum Vol. II. Fratres Borntraeger, Lipsiae. 1~396
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侵染铁筷子的单胞锈菌一新种
庄剑云 魏淑霞
（中国科学院微生物研究所真菌地衣系统学重点实验室 北京 100080）
摘 要： 描述了寄生于铁筷子 Helleborus thibetanus （毛茛科）的单胞锈菌属一新种 Uromyces
hellebori-thibetani. 本种冬孢子表面具不规则粗疣，与广布北温带 Aconitum上的Uromyces lycoctoni及欧洲
Ranunculus上的U. ficariae和U. fischerianus明显不同。后三个种的冬孢子表面均为光滑。北美洲Ranunculus
上的 U. jonesii的冬孢子与本种的相似，但它是个短生活史的种，生活史中不产生夏孢子。
关键词：锈菌，铁筷子单胞锈菌，毛茛科，分类学关系，分布
中图分类号：Q939.5 文献标识码：A 文章编号：1007-3515（2003）04-0513-0514