854 THE JOURNAL OF BOTANY 
NOTES ON THE BRITISH K@LERIAS. 
By G. Cuartper Drucr, M.A., F.L.S. 
Unper the title ‘‘ Fragmente zu einer Monographie der Gattung 
Keleria” Dr. Karl Domin has published in the Ungarische Bot. 
Blatter, Jahrgang iii. 1904, Nos. 6-12, an excellent account of the 
genus Kaleria, which is to form the basis of a future mo: nograph. 
From a very rich collection of material the author i . convinced that 
some Borin of forms, and ce eer! in the case of the extremely 
countries ; if one noted every aivecepass from type, it would be 
necessary to recognize hundreds of varieties of different degrees. He 
explains this extreme tendency to variability by suggesting that most 
Keelerias are still a actively ae ng. They are quite modern 
types, and ine seve! species, which, however, 
are not yet sufliciently fixed; this is expecially true of the numerous 
appear, an often represented as 
but (particularly where t the: tw territorial species of one 
f reove 
distant com are united by forms almost intermediate in character, 
which must heer as an extreme variation of one or the other. 
If we are not duipowel to count such forms as transitional, but only 
to accept them on the score of an extensive variability, the con- 
sideration cannot be evaded that all species of the section Airochloa 
8. of d 
mination by diagnosis. A species fixed by several leading characters 
is of course always easy to recognize when it retains its characteristic 
facies, but exceedingly difficult. to diagnose when one or another of 
the le os heparin disappears, though the other leading points 
experie ge. Thus sometimes there would be hardly any 
fixed point useful for every case, for ' determining a form. Associated 
y species, after flowering, 
imitate ons: forms in colour, convolution, and hairiness of leaves. 
i abstracted from Dr. Domin’s memoir such information 
ieee a our British forms (some of which he has not met with 
elsewhere) as is likely to be useful to eT of this Journal who 
may not have access to the original paper. I have also to thank 
Dr. stare for ora ttd unpubli ished Trt, which I have 
incorporated in cei arks. 
bi 
DENS hes uce (K. vallesiana Aschers. & Graebn.) 
was sufficiently a described in the last number of this Journal. Dr. 
Domin says var riations of this species are not extensive, 
and hardly justify the establishment of ‘‘varieties.”’ Specially 
variable is isthe clothing of stem and glumes; but, though these 
differences are so extreme that they affect the external habit of 
the whole plant, there are numberless intermediate forms, some- 
