MONOGRAPH OF THE BRITISH SPECIES OF EUPHRASIA. 473 



well as by the character of the teeth of the leaves and bracts, and 

 also by its bald capsule. 



Hybrids. 



E. EosTKoviANA X NEMOROSA TowHS. E. glanduUgeva Wettst. in 

 Mon. p. 290. 



Differt ab E. Rostkoviana jBoribus minoribus, tubo coroUae calycem 

 vix excedente, corollis circa 8 mm longis, foliis glabrescentibus ob- 

 scuris ut calyces glaudulis breviter stipitatis sparse obsitis ; ab E. 

 nemorosa capsula latiora et imprimis foliis et calycibus glanduliferis. 



I found this plant in tolerable quantity on the limestone hills 

 near Buxton, Derbyshire, in company with both parents, not far 

 from the spot where I found the plant I have noticed as closely 

 resembling E. campcstris Jord. The plant has more the general 

 appearance of E. nemorosa than of E. Rostkoviana. 



As noticed by Prof. Wettstein E. glandulif/era, in foliage and 

 habit, has an intermediate resemblance to both E. Rostkoviana and 

 E. nemorosa, and the Prof, accepts my determination of its being 

 a hybrid between these two species. 



E. Rostkoviana x brevipila. E. notata Towns. 



Diflfert ab E. Rostkoviana caulibus et foliis omnibus calycibusque 

 pilis longis glanduliferis et pilis brevibus rectis glanduliferis inter- 

 mixtis obsitis, bracteis aristatis, fioribus minoribus, tubo coroUje 

 breviore &c. Ab E. brevipila caulibus et foliis omnibus calycibus- 

 que pilis longis glanduliferis plus minusve obsitis &c. 



This plant seems to be not unfrequeut in Scotland in localities 

 in which both the supposed parents occur. I found it at Foyers, 

 Inverness-shire, and at Oban, Argyllshire, both in 1881, and near 

 Corran, Argyllshire, in 1896. The foliage varies, sometimes in- 

 clining in character to the one, sometimes to the other parent. 

 Prof. Wettstein who has seen specimens agreed with my determi- 

 nation of this plant as being a hybrid, provided the suggested parents 

 occurred in the neighbourhood, otherwise he would refer it to a var. 

 of E. Rostkoviana. 



E. gracilis X BREVIPILA. E. diff'ormis Towns. 



Differt ab E. gracilis caule infra media ramoso, foliis patentibus 

 et opacis &c., ab /'>". brevipila caule breviore, foliis eglandulosis et 

 setis fere nonnullis, fioribus minoribus &c. 



I only found this hybrid in one spot, covering about twenty 

 square yards of moorish and rocky ground, by the River Shiel at 

 Shiel Bridge, Argyllshire, on July 19th, 1896. The flowers were 

 quite those of E. gracilis, the foliage more that of E. brevipila. 

 Both these species occurred on the same ground and were abundant 

 in the neighbourhood. 



E. ocoiDENTALis X BREVjpiLA. E. pvotiuscola Towns. 



Differt ab E. borealis foliis calycibusque pilis glanduliferis plus 

 minus copiosis obsitis, ab E. brevipila caule humiliore, spica non 

 valde elongata, foliis colore fusco-viridia non colore graminis, 

 corollibus plerumque minoribus. 



This hybrid seems to occur frequently where the two parents 



