Mulberry
is a fast growing deciduous tree occurring in sub‑tropical, tropical and
temperate climates. Koidzumi (1917‑1923) grouped mulberry into two sections on
the length of the style of the female flower as Dolichostylae and Macromorus
and each subdivided on the features of stigma, as shown below:
A. Dolichostylae:
(a)
Pubescentes Morus arabica Koidz. (Arabiyaguwa Mizuhoguwa)
M.
mizuho Hotta
(b) Papillosae M. mongolica Schn. (Chosenguwa Oniguwa)
M.
mongolica var.
diabolica
Koidz.
M.
nigriformis Koidz. (Karaoniquwa)
M.
notabilis Schn. (Marubaguwa)
M.
bombycis Koidz. (Yamaguwa)
M.
rotundifolia Koidz. (Shamuguwa)
M.
acidosa Criff. (Shimaguwa)
M.
kagayamae Koidz. (Hachijoguwa)
B. Macromorus:
(a)
Pubescentes M. serrata Royb. (Tenjikuguwa)
M.
nigra L. (Ruromiguwa)
M.
tiliaefolia Makino. (Keguwa)
M.
cathayama. Memsl. (Karakeguwa)
(b) Papillosae M. mosozygia stapf. (Afurikaguwa)
M.
laevigata Wall. (Nagamiguwa)
M.
insignia Buv. (Amerikaguwa)
M. macroura
Miq. (Mareiguwa)
M. rubra L. (Akamiguwa)
M. mollis Rusby. (Yaharaguwa)
M.
celtidifolia Kunth. (Enokiguwa)
M.
microphylla Buckl. (Himeguwa)
M. boninensis Koidz. (Ogasawaraguwa)
M. lhou Koidz. (Roguwa)
M. alba L. (Karayamaguwa)
M.
atropurpurea Roxb. (Kantonguwa)
Hotta (1930)
divided mulberry species into two groups according to the shape and situation
of cystolith cell in leaves, Dolychocystolithiae and Brachycystolithiae.
Group 1.
Dolychocystolithiae:
Morus
bombycis, M. kagayamae and M. australis.
Group 2.
Brachycystolithiae:
Morus
latifolia, M. alba and M. tilaefolia.
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