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(Upload on April 17 2022) [ 日本語 | English ]

Berberidaceae Juss. (メギ科)






Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily

[Engler's syllabus (エングラー体系)]
Distribution: 570 species in 15 genera, mostly in the Northern Hemisphere
Achlys DC. (ナンブソウ)
A. japonica Maxim. (ナンブソウ)
Berberis L. (メギ)
Caulophyllum Michx. (ルイヨウボタン)
One native species in Japan, that is;
C. robustum Maxim. (ルイヨウボタン)
Diphylleia Mich. (サンカヨウ)
One native species in Japan, that is;
D. grayi Fr. Schmidt (サンカヨウ)
Epimedium L. (イカリソウ)
Jeffersonia Barton, auct. non Brickell (タツタソウ), twinleaf
J. diphylla (L.) Pers. (アメリカタツタソウ)
J. dubia (Maxim.) Benth. et Hook. f. ex Baker et S. Moore (タツタソウ)
Nandina Thunb. (ナンテン)
One species in Japan (imported), that is;
N. domestica Thunb. (ナンテン)

Non-native genera to Japan

Podophyllum L. (アメリカハッカクレン)
P. peltatum (アメリカハッカクレン)

Berberis L. (メギ, barberry, oregongrape or mahonia) in Japan

B. amurensis Rupr. (ヒロハノヘビノボラズ)
B. fortunei Lindl. ✂
B. japonica (Thunb.) R. Br. ✂
B. oiwakensis (Hayata) Laferr. (ニイタカヒイラギナンテン)
B. sieboldii Miq. (ヘビノボラズ), endemic to Japan (between Kyushu and central Honshu)
 B. thunbergii DC. (メギ)
B. tschonoskyana Regel (オオバメギ)
Northwest
B. nervosa Pursh ✂

Mahonia Nutt. (ヒイラギナンテン)

When separated
 M. fortunei (Lindl.) Fedde (ホソバヒイラギナンテン) ✂
M. japonica (Thunb.) DC. (ヒイラギナンテン)
M. oiwakensis Hayata ✂
Mahonia nervosa (Pursh) Nutt., widespread in the Northwest, leaves looking like Osmanthus heterophyllus

Epimedium L. (イカリソウ)

Ca 60 species in the world, 5-6 in Japan
E. diphyllum Lodd. ex Graham (バイカイカリソウ)

ssp. kitamuranum (T. Yamanaka) K. Suzuki (サイコクイカリソウ)

E. grandiflorum C. Morren (イカリソウ, s.l.)
E. koreanum Nakai (キバナイカリソウ)

var. coelestre (Nakai) Yonek. (クモイイカリソウ)

E. sagittatum (Siebold et Zucc.) Maxim. (ホザキノイカリソウ), evergreen, non-native to Japan
E. sempervirens Nakai ex F. Maek. (トキワイカリソウ)
 E. trifoliatobinatum (Koidz.) Koidz. (ヒメイカリソウ)

ssp. maritimum K. Suzuki (シオミイカリソウ)
f. rosiflorum Akasawa (ウスベニヒメイカリソウ)

Putative hybrids:
E. × setosum Koidz. (オオバイカイカリソウ)
E. × youngianum Fisch. et C. A. Mey. (ウメザキイカリソウ)
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