[Euphrasia]
EYEBRIGHTS HYBRID CHART
[Euphrasia]
EYEBRIGHTS
HYBRIDS
BSBI MAPS
Eyebright
(arctica)
Eyebright
(cambrica)
Eyebright
(campbelliae)
Eyebright
(confusa)
Eyebright
(foulaensis)
Eyebright
(frigida)
Eyebright
(heslop-harrisonii)
Eyebright
(marshallii)
Slender
Heath
Eyebright

(micrantha)
Common
Eyebright

(nemorosa)
Eyebright
(ostenfeldii)
Chalk
Eyebright

(pseudokerneri)
Eyebright
(rivularis)
Eyebright
(rostkoviana)
Eyebright
(rotundifolia)
Eyebright
(salisburgensis)
Eyebright
(scottica)
Eyebright
(stricta)
Eyebright
(tetraquetra)
Eyebright
(vigursii)
Eyebright
(vigursii)
                  nemorosa
×
vigursii
                tetraquetra
×
vigursii
Eyebright
(tetraquetra)
arctica
×
tetraquetra
    confusa
×
tetraquetra
      marshallii
×
tetraquetra
micrantha
×
tetraquetra
nemorosa
×
tetraquetra
ostenfeldii
×
tetraquetra
pseudokerneri
×
tetraquetra
          stricta
×
tetraquetra
tetraquetra
×
vigursii
Eyebright
(stricta)
                  Euphrasia
×
haussknechtii
              stricta
×
tetraquetra
 
Eyebright
(scottica)
Euphrasia
×
venusta
    confusa
×
scottica
foulaensis
×
scottica
frigida
×
scottica
  marshallii
×
scottica
Euphrasia
×
electa
nemorosa
×
scottica
ostenfeldii
×
scottica
  rivularis
×
scottica
           
Eyebright
(salisburgensis)
arctica
×
salisburgensis
                nemorosa
×
salisburgensis
                 
Eyebright
(rotundifolia)
        foulaensis
×
rotundifolia
    marshallii
×
rotundifolia
  nemorosa
×
rotundifolia
                 
Eyebright
(rostkoviana)
                Euphrasia
×
eurycarpa
                   
Eyebright
(rivularis)
                              rivularis
×
scottica
     
Chalk
Eyebright

(pseudokerneri)
      confusa
×
pseudokerneri
          nemorosa
×
pseudokerneri
              pseudokerneri
×
tetraquetra
 
Eyebright
(ostenfeldii)
arctica
×
ostenfeldii
cambrica
×
ostenfeldii
  confusa
×
ostenfeldii
foulaensis
×
ostenfeldii
      micrantha
×
ostenfeldii
            ostenfeldii
×
scottica
  ostenfeldii
×
tetraquetra
 
Common
Eyebright

(nemorosa)
arctica
×
nemorosa
  campbelliae
×
nemorosa
confusa
×
nemorosa
foulaensis
×
nemorosa
    marshallii
×
nemorosa
micrantha
×
nemorosa
  nemorosa
×
pseudokerneri
    nemorosa
×
rotundifolia
nemorosa
×
salisburgensis
nemorosa
×
scottica
Euphrasia
×
haussknechtii
nemorosa
×
tetraquetra
nemorosa
×
vigursii
Slender
Heath
Eyebright

(micrantha)
Euphrasia
×
difformis
  campbelliae
×
micrantha
confusa
×
micrantha
foulaensis
×
micrantha
frigida
×
micrantha
  marshallii
×
micrantha
micrantha
×
nemorosa
micrantha
×
ostenfeldii
    Euphrasia
×
eurycarpa
    Euphrasia
×
electa
  micrantha
×
tetraquetra
 
Eyebright
(marshallii)
arctica
×
marshallii
  campbelliae
×
marshallii
  foulaensis
×
marshallii
    marshallii
×
micrantha
marshallii
×
nemorosa
        marshallii
×
rotundifolia
  marshallii
×
scottica
  marshallii
×
tetraquetra
 
Eyebright
(heslop-harrisonii)
arctica
×
heslop-harrisonii
    confusa
×
heslop-harrisonii
                             
Eyebright
(frigida)
      confusa
×
frigida
      frigida
×
micrantha
              frigida
×
scottica
     
Eyebright
(foulaensis)
arctica
×
foulaensis
    Euphrasia
×
atroviolacea
    foulaensis
×
marshallii
foulaensis
×
micrantha
foulaensis
×
nemorosa
foulaensis
×
ostenfeldii
      foulaensis
×
rotundifolia
  foulaensis
×
scottica
     
Eyebright
(confusa)
arctica
×
confusa
  campbelliae
×
confusa
Euphrasia
×
atroviolacea
confusa
×
frigida
confusa
×
heslop-harrisonii
  confusa
×
micrantha
confusa
×
nemorosa
confusa
×
ostenfeldii
confusa
×
pseudokerneri
        confusa
×
scottica
  confusa
×
tetraquetra
 
Eyebright
(campbelliae)
    campbelliae
×
confusa
      campbelliae
×
marshallii
campbelliae
×
micrantha
campbelliae
×
nemorosa
                   
Eyebright
(cambrica)
                  cambrica
×
ostenfeldii
                 
Eyebright
(arctica)
    arctica
×
confusa
arctica
×
foulaensis
  arctica
×
heslop-harrisonii
arctica
×
marshallii
Euphrasia
×
difformis
arctica
×
nemorosa
arctica
×
ostenfeldii
        arctica
×
salisburgensis
Euphrasia
×
venusta
  arctica
×
tetraquetra
 

A triple hybrid exists, namely:
Euphrasia confusa × frigida × scottica
which is over-lapped on the above chart by normal hybrids.

Euphrasia SPECIES LACKING HYBRIDS
(Euphrasia arctica subsp. arctica) Eyebright
(Euphrasia arctica subsp. borealis) Arctic Eyebright
(Euphrasia officinalis agg.) Eyebright
(Euphrasia officinalis subsp. anglica) English Eyebright
(Euphrasia officinalis subsp. monticola) Eyebright
(Euphrasia officinalis subsp. pratensis) Eyebright
(Euphrasia rhumica)