Arisaema parisifolia J. Murata (Araceae) from Laos and Vietrtam

2005·1.1 MB·English

by  Jin Murata

December 2005 Journal of Japanese Botany Vol. 80 No. 6 349
Notes
Jin MURATA: Arisaema parisifolia J. Murata (Araceae) from Laos and Vietnam
ラオスとベトナムに産するテンナンショウ属の一種Arisaemaparisifolia J. Murata (新
称) (サトイモ科) (邑田仁)
Arisaema parisifolia J. Murata，n om. nov. in size， 10-15 cm long，2 0-50 mmw ide，
is proposed for A. petiolulatum Gagnep.， apex acuminate to caudate，b ase cuneate to
which is al ater homonym of A. petiolulatum distinct petiolule of 10-20 mm long.
Hook. f. This species of section Sinarisaema Peduncle 1/2-as long as petiole. Spathe tube
has been recorded from Laos and Vietnam cylindrical，3 0--43m ml ong，8 -12 mmw ide，
but is imperfectly known (Gusman and distinctly auriculate at mouth，l amina 40-51
Gusman 2001). Based on examinations of mml ong，l ower half ovate，1 4-18 mmw ide，
specimens in the Paris (P) and Kew (K) her- upper half caudate. Male spadix 14 mml ong，
b紅白， it has been revealed that this species is 2m mw ide，w ith rather sp但・semale f1owers，
distinct，w ith petiolulate leaf1ets，a small- appendage slender cylindrical， 18-25 mm
sized spathe with auriculate mouth and a long，0 .5-1 mmw ide，l acking protuberances，
caudate and seemingly upright lamina，a nd apex upright ?o r forecurved. Female spadix
very slender spadix appendage with af ew 8-9 mml ong，5 -7 mmw ide，a ppendage
projections in the lower part. Gagnepain slender cylindrical ca. 30 mml ong，0 .7-1
(1941，1 942) described the length of the mmw ide，l ower p twith sparse protuber-
訂
male spadix and its appendage to be 3c m ances of ca. 2 mml ong，a pex upright or
and 1c m respectively but this might be an slightly forecurved.
error for 1c m and 3c m，r espectively. The Other specimens examined: VIETNAM: Chapa，
source of color description by Gagnepain is Environs de la Garderie de Lo qui ho. 1600 m. Peterot
8631 (P).
not traced but might be based on the color of
the type specimen(s)，th at were rather young
References
at the time. Ane mended description is given
Gagnepain F. 1941. Aracees nouvelles Indochinoises.
below.
Notul. Syst. (Paris) 9: 116-140.
一一-1942. Aracees. In: Lecomte H. (ed.)， Flore
Arisaema parisifolia J. Murata， nom. Generale de l'Indo-Chine. 6: 1075-1196. Masson，
nov. [Figs. 1-2] Paris.
A. petiolulatum Gagnep. in Notul. Syst. 9: Gusman G. and Gusman L. 2001. The Genus
126 (1941)，n om. superfl. to A. petiolulatum Arisaema. G. Gantner Verlag KG， Ruggell/
Lichtenstein.
Hook. f. (1893)-Gagnep. Fl. Gen. lndo-
Chin. 6: 1189 (1942)-P.-H. Ho， Cayco Parisおよび、Kewの標本室に所蔵される標本に基
Vietnam 3: 452 (1993)-G. Gusman & L. づきこれまで正体が明らかでなかった A.
Gusman，G en. Aris.: 399 (2001). Type: petiolulatum Gagnep.を再検討した.その結果，花
LAOS. PU Muten，C hueingkwang，ca . 1500 序が著しく小型であり，仏炎志の筒口部が耳状に
開出し，舷部の上半部が尾状に尖ること，花序付
m，A pril 20，1 932，A . F. G. Kerr 21164 (P-
属体が細いことなどの特徴を持ち，クルマパテン
holo; K-iso).
ナンショウ節において他に類のない種であること
Paradioecious. Tuber subglobose. Major が明らかとなった. Gagnepainのラテン名は A.
cataphylls 2-3，me mbranaceous. Pseudostem petiolulatum Hook. f.の後続同名で無効である.そ
5.5-20 cml ong. Foliage leaf solitary，pe tiole こで，小葉柄が明らかで Parispolyphyllaの葉の
12-18 cm long. Leaf1ets 6-8，r adiate，e qual 配列に似ていることから Arisaemaparisゆliaとい
350 植物研究雑誌 第80巻 第6号 平成17年12月
Fig･1･HolotypeofArisaemaparis陶IiaJ･Murata(=A.petiolulatumGagnep.;Kerr21164,P).
December 2005 Journal of Japanese Botany Vol. 80 No. 6 351
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Fig. 2. Female inflorescences of Arisaemαparisifolia in the isotype speci-
mens in K (lit from behind).
う新名を発表することにした.乾燥標本のため確 (Botanical Gardens，Gr aduate School of Science，
実ではないが，舷部は直立または斜上するものと The University of Tokyo
推定される. 東京大学大学院理学系研究科附属植物園)