EXTTimTlON MKETTNC!, 1052 
f)0 
In the type area of “ N. occidentahs ” almost the full range of 
ation of N. alba is to be found, and it is probable that the “ s])ecies 
was based in the first instance upon a few selected small specimens. 
Mrs. Y. Hest.oc-Haruison. 
1’esxu.ts of Recent Work on Rome British Plants at the Depart- 
ment OF Botany, University College of TjEicester 
(1) The Affinities of CATABBOSA AQU ATICA 
The genus Catabrosa is somewhat isolated, and though generally 
placed in the tribe Festuceae, possesses some morphological features, 
which, taken in conjunction with the basic chromosome number n = 10 
might indicate affinities with the 01 i/cerienp,. The exhibit illustrated 
some of these characters. 
On the whole it would seem that the morphological affinities of 
Catabro!iu are with tbe Festuceae, and also the ten chromosomes of 
Catabrosa are large, resembling those of the Festuceae, whereas 
Ohjceria chromosomes are small. 
M. Borrill. 
(2) (a) A Reugf. New to Britain 
.\n account of this exhibit is being prepared foi' Watsijuia . 
(b) Rome Hyrrid Redges 
Rpecimens of Oarear hostlana, x lepidoea rjui , C. dlstans x lepidocarpa 
and C. distans x exteiisa were exhibited. The first two hybrids are 
similar, and rather difficult to distinguish in the field. The main char- 
acters which distinguish 0. hostiana and C. distav^s are given below, 
and these differences are useful in identifying the hybrids. 
r. hostiana DC. C. disf.ans L. 
Plant shortly creeping. Plant tufted. 
Female glumes 3-4 mm., broadly ovate, 
acute, dark brown with a broad hya- 
line margin and pale midrib. 
Female glumes 3 mm., ovate, mucro- 
nate, reddish-brown or green with a 
pale midrib. 
Perigynia 5 mm., ovoid, many-ribbed, 
rather inflated; beak l mm., slender, 
flattened, margin serrulate. 
Haploid chromosome number = 28. 
Perigynia 4 mm., ellipsoid trigonous, 
equally many-ribbed, often faintly 
punctate; beak 0.70 mm., bifid and 
rough. 
Haploid chromosome, number = 37. 
Miss E. W. Davies. 
fd) Variation in BANUNCULUS FLAM MU LA 
A range of forms of 7'. fiximmula L., from the large coar,se B. flaw- 
'intd.a. var. nratns Pers., closely re.sembling B. lingua L., through the 
normal type to the small, creeping B. flammula var. pseudo-reptans 
Syme, which is difficult to distinguish from B. reptans L,, were shown. 
Typical deep shade and submerged forms were also shown and the latter 
contrasted with B. scoticvs E. S. Marshall, a rare northern species or 
