3. 



2 Dansk Botanisk Arkiv, Bd. 2. Nr. 9. 



of this that the flora of mosses and lichens have been even mode- 

 rately explored. A beginning is made, that is all. This is shown, 

 too, as far as the mosses are concerned, by a comparison of our 

 list of mosses with the one made by Elizabeth Gertrude Brit- 

 ton ^ based upon collections in 1913. The two lists contain about 

 the same number of species, Miss Britton's 23, ours 24, all of 

 them collected in the Danish West-Indies; but 9 species only are 

 common to both lists, which shows that not even a fourth part 

 of the collected species are common to both lists, these pointly 

 containing the 38 species of mosses now known in St. Croix, St. 

 Thomas, and St. Jan. Four of these 38 species have, up till now, 

 never been found elsewhere, except in the above-mentioned is- 

 lands, namely: Hyophila uliginosa E. G. Britton, Phascum sessile 

 E. G. Britton, Trichostomum perviride Brotherus, and Bryiim (Apa- 

 lodictyon) Raunkiserii Brotherus. 



Even if the number of species of mosses undoubtedly, in the 

 course of time, will increase greatly, the fact remains that the 

 former Danish West-Indies are as deficient in species as they are 

 destitute of areas covered with mosses. Larger patches of ground 

 covered densely with moss are found only on the higher lands, 

 6. g. Makumbo at St. Jan. 



The hchenflora is far richer in species, our list containing 156 

 species, of which 59 are described as new in the above-quoted 

 work of Wainio. All these species have so far, been found only 

 in the Danish West Indies. Many of the new species live on stones 

 and cliffs in places sprayed by the surf, and one of us, Borgesen, 

 had opportunity of making collections here. Most of the species 

 from this locality have never been described before. 



^ Elizabeth Gertrude Britton. West-Indian Mosses. II. Mosses of the 

 Danish West Indies and Virgin- Islands. (Bull, of the Torr. Botan. Club 

 42. 1916.) 



