anchor.diff:  "Hieracium umbellatum L. var. japonicum",4057,"GN","Okayama"
   "Ehretia acuminata R. Br. var. obovata Lindl.",448,"GN","Okayama"
   "Anodendron affine (Hook. et Arn.) Drude",4695,"GN","Okayama"
  +"Quercus gilva Blume",9737,"GN","Okayama"
   "Maesa japonica (Thunb.) Moritzi",4530,"GN","Okayama"
  -"Quercus gilva Blume",9737,"GN","Okayama"
   "Rhododendron macrosepalum Maxim.",4436,"BU","Okayama"
   "Photinia glabra (Thunb.) Maxim.",11302,"GN","Okayama"
   "Daphne kiusiana Miq.",5539,"GN","Okayama"
  
positive.code: "Impatiens textorii Miq.",5408,"GN","Hokkaido"
  "Menyanthes trifoliata L.",4683,"GN","Hokkaido"
  "Magnolia kobus DC.",10251,"GN","Hokkaido"
  "Hieracium umbellatum L. var. japonicum",4057,"GN","Hokkaido"
  "Cladothamnus bracteatus (Maxim.) Yamazaki",4410,"BU","Hokkaido"
  "Phryma leptostachya L. var. oblongifolia Koidz.",499,"GN","Hokkaido"
  "Hylodesmum podocarpum (DC.) H.Ohashi et R.R.Mill var. oxyphyllum (DC.) H.Ohashi et R.R.Mill",11743,"GN","Hokkaido"
  "Staphylea bumalda DC.",5456,"GN","Hokkaido"
  "Salicornia europaea L.",10195,"GN","Hokkaido"
  "Gaultheria miqueliana Takeda",4495,"GN","Hokkaido"
  "Taraxacum shikotanense Kitam.",4018,"GD","Hokkaido"
  "Sorbus matsumurana (Makino) Koehne",11294,"BU","Hokkaido"
  "Patrinia scabiosifolia Fisch. ex Trevir.",5256,"GN","Hokkaido"
  "Fraxinus sieboldiana Bl.",4625,"GN","Hokkaido"
  "Penstemon frutescens Lamb.",5033,"GN","Hokkaido"
  "Fauria crista-galli (Menz.) Makino subsp. japonica Fr.",395,"BU","Hokkaido"
  "Geum calthifolium Sm. var. nipponicum (F.Bolle) Ohwi",11572,"GN","Hokkaido"
  
negative.code: "Litsea coreana H.Lev.",10295,"GN","Kochi"
  "Elaeocarpus sylvestris (Lour.) Poir.",5493,"GN","Kochi"
  "Deutzia crenata Siebold et Zucc. var. crenata",11185,"GN","Kochi"
  "Makinoa crispata",30375,"GN","Kochi"
  "Saxifraga fortunei Hook. f. var. alpina (Matsum. et Nakai) Nakai",11092,"GN","Ehime"
  "Saxifraga fortunei Hook. f. var. alpina (Matsum. et Nakai) Nakai",11092,"GN","Kochi"
  "Osmanthus heterophyllus (G. Don) P. S. Green",4634,"BU","Kochi"
  "Tsuga sieboldii Carri{e`}re",3972,"GN","Kochi"
  "Rubus buergeri Miq.",11408,"GN","Kochi"
  "Cryptotaenia japonica Hassk.",5765,"GN","Kochi"
  "Ternstroemia gymnanthera (Wight et Arn.) Bedd.",10727,"GN","Kochi"
  "Sphenomeris chinensis (L.) Maxon",3405,"GN","Kochi"
  "Woodwardia orientalis Sw.",3537,"GN","Kochi"
  