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October 2015TheJournal of Japanese Botany Vol. 90 No. 5349
J. Jpn. Bot. 90: 349–350 (2015)
Hiroyoshi Ohashi: The Taxonomic Status of Aralia cordata var. sachalinensis
(Araliaceae)
Herbarium TUS, Botanical Gardens, Tohoku University, Sendai, 980-0862 JAPAN
E-mail: ohashi@m.tohoku.ac.jp
S u m m a r y : Ar a l ia c ord a t a T hunb . var .
sachalinensis (Regel) Nakai should be included in
the typical form, var. cordata as a synonym.
Aralia cordata Thunb. was described from
Japan and is distributed widely in East Asia. The
northern form has often been recorded as var.
sachalinensis (Regel) Nakai. The variety was
described by Regel (1864) as “A. racemosa β.
sachalinensis Rgl.; robustior, oribus plerumque
hexameris” and illustrated (Fig. 432) a owering
branch with an enlarged young fruit (as “a”)
and flower (as “b”). Regel (1864) did not cite
any specimens for var. sachalinensis in the
protologue.
Nakai (1924) newly characterized the variety
that “the variety sachalinensis differs from the
type [i.e., var. cordata] in its pubescent calyx.
Regel says “Bluthenstiele und Fruchtknoten
dicht kurzhaarig.” This Fruchtknoten does not
mean ovary but the calyx-tube. In the type the
calyx-tube is perfectly smooth.” In Regel’s
figure, however, the calyx-tube is entirely
glabrous in “a” and “b”. The variety in the sense
of Nakai (1924) has been accepted by Hara
(1936, 1954), Ohwi (1953, 1965a, 1965b), Ohba
(1999) and Yonekura (2012), but was not treated
by Kharkevicz (1987) and not accepted by
Takahashi (2015).
This short note aims to clarify the taxonomic
status of the variety.
Regel (1864) and Nakai (1924) distinguished
var. sachalinensis from their mother species by
the larger plant size. The plant size is variable
and useless for distinction of the variety. Regel
adopted hexamerous oral composition, but the
character is within variation range of the species.
Characters adopted by Regel are useless for
circumscription of the variety.
Nakai found a form with pubescent calyces
as a diagnostic character distinguishing it from
the typical form. Aralia cordata has, however,
an always tomentose pedicel, and flowers with
the calyx glabrous or sometime pubescent when
younger. Features of the calyx-tube are kept in
mature flowers and young fruits. Mature fruits
are all entirely glabrous. When the calyx-tube is
pubescent, density of the pubescence is scarce,
and never densely hairy as in the pedicel. The
calyces of Aralia cordata are generally glabrous
or sometimes scarcely pubescent.
The species is distributed in Sakhalin,
Kuriles, Hokkaido, Honshu, Shikoku, Kyushu,
the Ryukyus, Korea, Taiwan, and China.
Specimens having the pubescent calyx-tube
were found in Sakhalin, common in Hokkaido,
rarely in Honshu (sometimes in northern Honshu
and Hokuriku regions) and rarely in Kyushu so
far as those examined in TUS (these specimens
are cited under the names below). On the other
hand, specimens having a glabrous calyx-tube
were distributed sporadically throughout the
whole range. The plants with a pubescent calyx
are found more frequently in Hokkaido and
northwards than Honshu and southwards. In fact,
Nakai (1924) cited only two specimens for var.
sachalinensis: “Yeso: in declivitate Senibako,
T. Nakai” and “Saghalin: sine loco speciali,
Migul”.
Based on the observation mentioned above,
var. sachalinensis (Regel) Nakai is considered as
indistinct from the commonest form within the
350植物研究雑誌 第 90 巻 第 5号2015 年10 月
species.
Aralia cordata Thunb., Fl. Jap.: 127 (1784);
Nakai in J. Arn. Arb. 5: 28 (1924); Ohwi, Fl.
Jap.: 829 (1953), ed. Engl.: 662 (1965); E.
Walker, Fl. Okinawa: 787 (1976); Kljuykov
& Tikhomirov in Kharkev., Pl. Vasc. Or. Extr.
Soviet. 2: 201, t. 21 D (1987); H. Ohashi & S. Y.
Lu, Fl. Taiwan ed. 2, 3: 990 (1993); W. T. Lee,
Lineam. Fl. Kor. 1: 771 (1996); C. B. Shang
& Lowry, Fl. China 13: 488 (2007); Hideki
Takahashi, Pl. Kulril: 358 (2015).
A. racemosa var. sachalinensis Regel in
Garten. 13: 100, t. 432 (1864).
A. cordata var. sachalinensis (Regel)
Nakai in J. Arn. Arb. 5: 29 (1924); H. Hara in
Bot. Mag. (Tokyo) 50: 364 (1936), & Enum.
Spermatoph. Jap. 3: 281 (1954); Ohwi, Fl. Jap.:
829 (1953); Kitam. & Murata, Col. Illust. Herb.
Pl. Jap. 2: 33 (1961); Ohwi, Fl. Jap. ed. Engl.:
662 (1965); H. Ohba in K. Iwats. & al., Fl. Jap.
2c: 260 (1999); Yonek., Enum. Vasc. Pl. Jap.:
228 (2012).
Specimens with pubescent calyces examined (all in
TUS): Sakhalin. Between Khazarskoye and Khwalisekoye
Lak. 8 Aug. 1996. S. Tsuji & al. s.n. (TUS 335804).
Hokkaido: Hidaka Division. 17 Aug. 1996. Yamaji 1634
(TUS 374228, 374227), Yamaji 1633 (374229); Hiyama
Division. 5 Sep. 2009. Yonekura 16797 (TUS 398195,
398196, 398197), 3 Sep. 2009. Yonekura 16703 (TUS
399389); Ishikari Division. 9 Sep. 1981. Takahashi &
al. 1824 (TUS 69562); Kushiro Division. 13 Aug. 1988.
Takehara & Nemoto 7117 (TUS 136743, 136744);
Shiribeshi. 3 Aug. 1984. Hoshi & al. 1161-1 (TUS
108938); 5 Aug. 1983. Takahashi & al. 75 (TUS 89057).
Honshu. [Tohoku Distr.] Aomori Pref. Asamushi. 15 Aug.
1926. Tahara s.n. (TUS 28176), between Sarukura. 12 Aug.
2000. Yonekura 6008 (TUS 251199; Miyagi Pref. Naito
& Ishikawa s.n. 24 Aug. 1977 (TUSG); Yamagata Pref. C.
Suzuki s.n. 13 Aug. 1938 (TUS164928), Nemoto 1749. 6
Aug. 1983. (TUS 89742); Fukushima Pref. 25 Aug. 1985.
Ohashi & al. 21950 (TUS 123266), Shiozawa 28 Aug.
1983. Iketani 1089 (TUS 138743); Iwate Pref. 19 Aug.
1935. Iwabuchi 5266 (TUS 51542), Yonekura 7369. 24
Aug. 2001. (TUS 274998). [Hokuriku Distr.] Toyama Pref.
13 Aug. 1983. Hoshi & Nagakawa 862 (TUS 138896).
Nagano Pref. Mt. Togakushi. 15 Aug. 1981. Simoda 116
(TUS 102446). Kyushu. Nagasakai Pref. 5 Sep. 2001.
Yonekura 7495 (TUS 270373).
References
Hara H. 1936. Preliminary report on the ora of southern
Hidaka, Hokkaido (Yezo). XIII. Bot. Mag. (Tokyo) 50:
363–370, 364
Hara H. 1954. Araliaceae. I n : Enumeratio
Spermatophytorum Japonicarum 3: 277–291. Iwanami
Shoten, Tokyo
Kharkevicz S. S. 1987. Aralia. In: Kharkevicz S. S. (ed.),
Plantae Vasculares Orientis Extremi Sovietici 2: 200–
202. Nauka, Leningrad (in Russian).
Nakai T. 1924. Araliaceae imperii Japonici. J. Arn. Arb. 5:
1–36.
Ohashi H. and Lu S. Y. 1993. Araliaceae. In: Editorial
Committee of the Flora of Taiwan (ed.), Flora of
Taiwan. ed. 2 3: 986–1009.
Ohba H. 1999. Araliaceae. In: Iwatsuki K., Boufford D.
E. and Ohba H. (eds.), Flora of Japan 2c: 259–267.
Kodansha, Tokyo.
Ohwi J. 1953. Flora of Japan. Shibundo, Tokyo (in
Japanese).
Ohwi J. 1965. Flora of Japan (in English). Smithsonian
Institution, Washington, D.C.
Takahashi H. 2015. Plants of the Kuril Islands. Hokkaido
University Press, Sapporo (in Japanese).
Yonekura K. 2012. Enumeration of Vascular Plants of
Japan. Hokuryukan, Tokyo (in Japanese).
大橋広好：ウコギ科カラフトウドの実体
ウドは花柄にビロード毛があり，花柄の先端に花が分
化するが萼は無毛で，果実も無毛である．ときに萼にも
花柄の毛と似た種類の毛がまばらにあり，中井 (1924)
はこの形をカラフトウド（エゾウド）としてウドから区
別した．北海道とサハリンの標本による．TUS の標本
で見た限りでは北海道にふつうで（多分サハリンも同
様），ときに東北にあり，まれに富山県，長野県戸隠山
と長崎県 (Yonekura 7495 [TUS 270373])にもあった．
サハリンにも萼が無毛の形がある（Sakhalin, Maoka 真
岡(Kholmsk), [ca.14204E, 4703N]. 30 Jul. 1931. Mt.
Hakkoda Botanical Lab. Sakhalin Expedition No. 6.
[TUS 37808]）．カラフトウドは単なる萼毛の変異形で
あると思われ，分類群として認められない．
北海道大学総合博物館高橋英樹教授に文献を見せて
いただいた．お礼申し上げる．
（東北大学植物園津田記念館）