iyo 



CARL SKOTTSBERG 



from all other species in its mode of growth (see below) and as it stands so 

 far apart from all the congeners on the south hemisphere. 



The arrangement of the glands on the lower leaf surface is illustrated in 

 fig. 23 b. These glands are of two kinds, smaller with a short, narrow, uni- 

 cellular stalk and a globose two-celled head with dark brown contents and 

 larger (much less numerous), sessile, like a semiglobose papilla, divided by a 

 radial wall and with yellowish contents. Both kinds were described by Wett- 

 STEIN in his monograph of the genus, p. 18 — 19. T ne long pedicellate glands 

 so common in many other species seem to be wanting. The smaller kind also 

 occurs on the upper side of the leaf and on the calyx. 



Fig. 23. Euphrasia formosissima : a leaves, showing general outline, b lower side ot leaf, 

 c bracts, d lower side of bract, a— d X 2; e two calyx lobes, inside, X 4; f stamens, X 12 \\ 



g capsule, X 6,6; h seed, X 20. 



The growth of other perennial EupJirasiac was explained by WETTSTEIN 

 1. c. 14. The shoots die off after hawing produced flowers, while lateral 

 branches, which are sterile the first season, become floriferous the next year, 

 and so forth. E. formosissima represents another type. To some extent it is 

 like many others, for the primary stem and a number of side branches may 

 produce flowers simultaneously, sometimes even a few shoots of a third genera- 

 tion flower at the same time. It occurs that a branch dies after having 

 flowered, but very often this is not the case: the branch survives, the top 

 continues to grow above the floral region and produces a new set of flowers, 

 and this may be repeated again; thus, the new species differs from all others. 

 If, as WETTSTEIN thinks, the perennial species are genetically older than the 

 annual, E. formosissima seems to exhibit the most primitive type of EupJirasia 

 known. 



Area of distribution: Endemic in Masafuera. 



