Table 1 List of isolated woody plants used as farmland boundary markers in Ibaraki Prefecture

Deutzia crenata Siebold & Zucc.

Hydrangeaceae

N

DS

1215 (60.7)

164 (92.7)

Pourthiaea villosa (Thunb.) Decne.

Rosaceae

N

DS

176 (8.8)

59 (33.3)

Euonymus japonicus Thunb.

Celastraceae

N

ES

155 (7.7)

43 (24.3)

Camellia sinensis (L.) Kuntze

Theaceae

A

ES

137 (6.8)

58 (32.8)

Morus bombycis Koidz.

Moraceae

N

DT

93 (4.6)

44 (24.9)

Celtis sinensis Pers.

Cannabaceae

N

DT

85 (4.2)

62 (35)

Zelkova serrata (Thunb.) Makino

Ulmaceae

N

DT

18 (0.9)

13 (7.3)

Euonymus hamiltonianus Wall.

Celastraceae

N

DS

16 (0.8)

13 (7.3)

Celastrus orbiculatus Thunb.

Celastraceae

N

DV

9 (0.4)

8 (4.5)

Ligustrum lucidum W.T. Aiton

Oleaceae

A

ET

9 (0.4)

5 (2.8)

Ilex crenata Thunb.

Aquifoliaceae

N

ES

7 (0.3)

5 (2.8)

Quercus serrata Murray

Fagaceae

N

DT

6 (0.3)

5 (2.8)

Viburnum dilatatum Thunb.

Adoxaceae

N

DS

6 (0.3)

5 (2.8)

Ligustrum obtusifolium Siebold & Zucc.

Oleaceae

N

DS

6 (0.3)

4 (2.3)

Aphananthe aspera (Thunb.) Planch.

Cannabaceae

N

DT

5 (0.2)

4 (2.3)

Quercus myrsinifolia Willd.

Fagaceae

N

ET

4 (0.2)

4 (2.3)

Symplocos chinensis (Lour.) Druce

Symplocaceae

N

DS

4 (0.2)

4 (2.3)

Lindera glauca (Siebold & Zucc.) Blume

Lauraceae

N

DS

4 (0.2)

3 (1.7)

Eurya japonica Thunb.

Pentaphylacaceae

N

ES/ET

4 (0.2)

2 (1.1)

Callicarpa japonica Thunb.

Lamiaceae

N

DS

3 (0.1)

3 (1.7)

Abelia spathulata Siebold & Zucc.

Caprifoliaceae

N

DS

3 (0.1)

1 (0.6)

Euonymus alatus (Thunb.) Siebold

Celastraceae

N

DS

2 (0.1)

2 (1.1)

Hibiscus syriacus L.

Malvaceae

A

DS

2 (0.1)

2 (1.1)

Quercus acutissima Carruth.

Fagaceae

N

DT

2 (0.1)

2 (1.1)

Toxicodendron trichocarpum (Miq.) Kuntze

Anacardiaceae

N

DT

2 (0.1)

2 (1.1)

Weigela decora (Nakai) Nakai

Caprifoliaceae

N

DS

2 (0.1)

2 (1.1)

Wisteria floribunda (Willd.) DC.

Leguminosae

N

DV

2 (0.1)

2 (1.1)

Pasania edulis (Makino) Makino

Fagaceae

N

ET

2 (0.1)

1 (0.6)

Ailanthus altissima (Mill.) Swingle

Simaroubaceae

A

DT

1 (0.0)

1 (0.6)

Camellia japonica L.

Theaceae

N

ET

1 (0.0)

1 (0.6)

Castanea crenata Siebold & Zucc.

Fagaceae

N

DT

1 (0.0)

1 (0.6)

Chaenomeles sinensis (Thouin) Koehne

Rosaceae

A

DT

1 (0.0)

1 (0.6)

Corylopsis spicata Siebold & Zucc.

Hamamelidaceae

NIN

DS

1 (0.0)

1 (0.6)

Diospyros kaki Thunb.

Ebenaceae

A

DT

1 (0.0)

1 (0.6)

Lonicera gracilipes Miq.

Caprifoliaceae

N

DS

1 (0.0)

1 (0.6)

Mallotus japonicus (L.f.) Müll. Arg.

Euphorbiaceae

N

DT

1 (0.0)

1 (0.6)

Melia azedarach L.

Meliaceae

NIN

DT

1 (0.0)

1 (0.6)

Nandina domestica Thunb.

Berberidaceae

NIN

ES

1 (0.0)

1 (0.6)

Picrasma quassioides (D. Don) Benn.

Simaroubaceae

N

DT

1 (0.0)

1 (0.6)

Podocarpus macrophyllus (Thunb.) Sweet

Podocarpaceae

N

ET

1 (0.0)

1 (0.6)

Prunus jamasakura Siebold ex Koidz

Rosaceae

N

DT

1 (0.0)

1 (0.6)

Punica granatum L.

Lythraceae

A

DT

1 (0.0)

1 (0.6)

Pyrus pyrifolia (Burm. f.) Nakai

Rosaceae

A

DT

1 (0.0)

1 (0.6)

Rhus javanica L.

Anacardiaceae

N

DT

1 (0.0)

1 (0.6)

Rosa multiflora Thunb.

Rosaceae

N

DS

1 (0.0)

1 (0.6)

Salix triandra L.

Salicaceae

N

ES/ET

1 (0.0)

1 (0.6)

Serissa japonica (Thunb.) Thunb.

Rubiaceae

A

ES

1 (0.0)

1 (0.6)

Spiraea thunbergii Siebold ex Blume

Rosaceae

NIN

DS

1 (0.0)

1 (0.6)

Stachyurus praecox Siebold & Zucc.

Stachyuraceae

N

DS

1 (0.0)

1 (0.6)

Ulmus parvifolia Jacq.

Ulmaceae

NIN

DT

1 (0.0)

1 (0.6)