Utricularia emarginata, Benj. 
BY 
BERTHA CHANDLER, M.A., B.Sc. 
With Plate XLIV. 
T HOUGH the genus Utricularia has received more attention than many 
others, owing to peculiarities of form, development, and to the 
possession of characteristic bladders, which features distinguish them from 
other plants, yet of the 150 or so species which are comprised in this 
interesting genus, only a very small fraction have been thoroughly examined, 
except from a systematic point of view. As early as 1848 Benjamin 1 
gave his results of a minute examination of Utricularia vulgaris , U. minor , 
&c., only, however, from a morphological and physiological standpoint; and 
in this direction also are the recent investigations of Kamienski, 2 Pilger, 3 
Brown, 4 Stapf, 5 Small, 6 Ostenfeld, 7 Goebel. 8 Other investigators such as 
Buchenau, 9 Cohn, 10 Darwin, 11 Pringsheim, 12 have greatly contributed to 
our knowledge of the structure and function of the various parts of the 
plant. From a comparative standpoint, however, the germination of the 
Utricularias is perhaps the most interesting and the most important; and 
among the first investigators in this direction was Kamienski, 13 who took 
as his type the common bladderwort, Utricularia vulgaris. Goebel 14 
has described and figured other species, e. g. U. oligosperma , U. reniformis , 
&c., with a more detailed description of U. vulgaris . More recently, 15 
he has examined other species in greater detail, such as U. jlexuosa , 
1 Botanische Zeitung, 1848. 
2 Supplement II, Ann. du Jard. Bot. de Buitenzorg, 1898. Botanische Jahrbiicher. Engler, 
xxxiii, 1902. 
3 Botanische Jahrbiicher. Engler, xxx, 1901-2. 
4 Trans. Linn. Soc., London (Ser. 2), vi, 1901. 
5 Dyer : Flora Trop. Afric. 4, Sect. II, 1906. Dyer : Flora Cap. 4, Sect. II, 1904. 
6 Flora of the United States. New York, 1903. 
7 Repert. nov. sp. regni veget. Berlin., ii, 1906. 8 Gartenflora, 40, 42, 45. 
9 Botanische Zeitung, 1865. 10 Uber die Funktion der Blasen . . . Pflanzen, 3. Heft, 185. 
11 Insectivorous Plants. ]2 Monatsberichte der Berliner Akademie, 1869. 
13 Botanische Zeitung, 1877. 14 Goebel: Pdanzenbiol. Schilderungen, 2,p. 127. 
15 Ann. du Jard. Bot. de Buitenzorg, 9, 1890-1. 
[Annals of Botany, Vol. XXIV. No. XCV. July, 19x0.] 
