Contributions to our Knowledge of the Species of 
Utricularia of Great Britain with Special Regard to 
the Morphology and Geographical Distribution of 
Utricularia ochroleuca. 
BY 
Professor Dr. H. GLUCK (Heidelberg). 
With Plates XLVII and XL VIII and seven Figures in the Text. 
I N the works 1 which are at my disposal, the following species are noted 
as certain : 
Utricularia vulgaris , L. 
„ major Schmid — U. neglecta i Lehmann. 
„ intermedia , Hayne. 
„ minor , L. 
In continental Europe the following species, with the exception of those 
above named, are found : 
Utricidaria Bremii . 
„ ochroleuca. 
„ exoleta . 2 
U. Bremii and U. ochroleuca possess a series of stations on the Conti- 
nent. U. exoleta is a tropical type which, however, is only known in one 
place in Portugal . 2 
U. Bremii is mentioned in Babington’s ‘ Manual ’, 3 but it is placed in 
parentheses, as this species has not been recorded with certainty for the 
Flora of Great Britain. 
As regards U. ochroleuca , certain indications and presumptions as to its 
occurrence in Great Britain are, it is true, to be found in the literature , 4 but 
up till now they have received no credence. During the last few years 
I have visited the British Isles several times to make some special studies 
1 J. D. Hooker, The Student’s Flora of the British Islands, London, 1870, pp. 297, 298. 
Charles Cardale Babington, Manual of British Botany, 9th ed., London, 1904. George West, 
A Further Contribution to a Comparative Study of the Dominant Phanerogamic and Higher 
Cryptogamic Flora of Aquatic Habit in Scottish Lakes : Proceedings of the Royal Society of 
Edinburgh, vol. xxx, pt. ii, p. 79. 
2 P. Ascherson, Verhandlungen der Deutschen Botan. Gesellschaft, vol. iv, 1886, p. 404. 
3 Charles C. Babington, Manual of British Botany, 9th ed., pp. 338 and 339. 
4 Compare W. Trail, Annales of Scottish Natural History, 1904. 
[Annals of Botany, Vol. XXVII. No. CVIII. October, 1913.] 
