. Botanisk tidsskrift. Botany; Plants; Plants. — 367 —. Fig. 2 (Vx). V. tricolor maritima from Læsø : lateral petals emarg, spur- bearing petal acum. 9. The form of the spur-bearing petal: Commonly the spur-bearing petal both in arvensis and tricolor is truncate or faintly emarginate; but in the dunes of the northern part of West-Jutland and upon Læsø types of tricolor are found, where this petal is pointed (Clausen 1921, p. 209, fig. 1). I therefore disting- uish the following two types: Pointed (acum = acuminata): fig. 2. Not pointed ( = non acum- inata). 10. The lateral sepals: I have
. Botanisk tidsskrift. Botany; Plants; Plants. — 367 —. Fig. 2 (Vx). V. tricolor maritima from Læsø : lateral petals emarg, spur- bearing petal acum. 9. The form of the spur-bearing petal: Commonly the spur-bearing petal both in arvensis and tricolor is truncate or faintly emarginate; but in the dunes of the northern part of West-Jutland and upon Læsø types of tricolor are found, where this petal is pointed (Clausen 1921, p. 209, fig. 1). I therefore disting- uish the following two types: Pointed (acum = acuminata): fig. 2. Not pointed ( = non acum- inata). 10. The lateral sepals: I have found a special character of these in some tricolors from dunes upon Læsø. The lateral sepals are somewhat incised at the tips : (fig. 2). This character was not previously known, and perhaps Læsø is the only place in the world, where it can be found; and probably it came into existence there endemically, by a mutation: Lateral sepals entire (integ = integerrima). Lateral sepals emarginate (emarg = emarginata). 11. The epidermis-cells of the petals: The surface of the petals of the majority of pansies from the gardens is velvet-like. This character is due to the epi- dermis-cells, which are extended to many densely placed small microscopic papils (fig. 3 a). The common wild types have not so large and so densely placed epidermis-papils, that the surface becomes velvet-like; but at Hadsund (Jutland) I have found a type of tricolor growing wild with velvet-like petals. This character I call velu tin a (velut). Common, not velvet-like petals: non-velutina (). 12. The pollen-grains: In a dry state the pollen-grains are shrunken, but they are able to absorb water very quickly. Then they swell and assume a characteristic form: seen from the edge they are ellipsoidal with a protuberant equatorial-belt (fig. 3 b)y but seen from above they appear either 4- or 5-edged (fig. 3 e), less frequently 3- or 6-edged (fig. 3 c, /). Il is the protuberant equatorial-belt giving
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