Euphrasia ostenfeldii, (Pugsley) Yeo

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1972, Flora Europaea. Volume 3. Diapensiacea to Myoporaceae, Cambridge: Cambridge University Press : 264

28. E. ostenfeldii (Pugsley) Yeo , Bot. Jour. Linn. Soc. 64: 359 (1971)

( E. curta var. ostenfeldii Pugsley , E. curta auct., non (Fries) Wettst.).

Stem erect or flexuous, with 0—4(-6) pairs of branches. Cauline internodes up to 3(-5) times as long as the leaves. Lowest flower at node (2—)3—7. Cauline leaves suborbicular to oblong-obovate, with not more than 4 pairs of teeth, the lower floral little larger than the upper cauline, suborbicular to oblongovate, with not more than 5 pairs of symmetrical, subacute to acute teeth. Corolla (3-5-)4-5-6 mm. Capsule 4-6 mm, as long as or longer than the calyx, not more than twice as long as wide, emarginate. Grassy, stony or sandy places, often near the sea. N. W. Europe, from N. Wales to Iceland. Br Fa Is.

E. davidssonii Pugsley , Jour. Bot. (London) 71: 308 (1933), described from Iceland, with hairy, deeply toothed leaves, is probably related to 28, but is insufficiently known. E. eurycarpa Pugsley , Naturalist (Leeds) 1945: 42 (1945), described from W. Scotland (island of Rum), is like 28 but has longer internodes and very wide, deeply emarginate capsule. It is perhaps of hybrid origin.