EXmumON MEETlNUj 1950 
SI 
At Stanwell the plant was growing in great profusion and 
in places it threatened the existence of the other species ex- 
hibited. Amongst these were Fofamogeton crispus L. and 1’. 
densvs L. : the former restricted to a small patch in the shade 
of a footbridge, the latter in greater quantity. I remember 
another Fotamogeton (not identified or exhibited) which used 
to grow quite commonly but which is now extinct for a stretch 
of three to four hundred yards of the River. 
The only plant which appears not tO' be threatened is Zan- 
nichellia pahustris L. which remains dominant in the swifter 
parts of the water. In contrast Elodea cuimdensis Michx. is 
now difficult to find. 
Other species exhibited were : — llanunculus fluitans Lam. 
(occurring in small quantity), Callitriche stagnalis Scop, and 
C. intermedia Hoffm. (many plants, but only near the banks), 
M i/riophylluin verticillatum L. (uncommon) and Lernna minor 
L. (growing freely). 
H. C. Grigg. 
Eini’ACTlS ViJCTBNSIS (T. & T. A. STEPH.) BROOKE & ROSE. 
As a result of searching various herbaria, numerous fresh 
records of E. vectensis (seiisu lato) have been brought to light 
in the last few years, and in some cases it has been possible to 
i-e-find the original colonies. Some entirely new stations have 
also l)een discovered. The exhibit showed specimens from some 
of the localities found or re-found in the last two years, and 
also a distribution map which demonstrated that the species 
occurs chiefly on calcareous soils, although it is not confined to 
thean. 
I'he distinction between E. vectensis and E. pendida C. 
Tlios., drawn in ]\ad,sunia 1, 108 (1949), is now seen to be un- 
satisfactory. Some of the specimens recently examined show 
intermediate characters, and mixed characters sometimes occur 
in a single colony. A remarkable range of variation is found 
in one colony in a beech-wood on the Cotswolds in E. Glos. 
(v.-c. 33), oi'iginally discovered by Lady Davy in 1935 (spm. 
in Hb. Druce, as E. leptochila Godf.), and re-found by the ex- 
hibitor this year. Here wdthin an area of about ^ sq. mile 
grow plants with almost every combination of 
perfect labelluin 
degenerate labelluin I with / sessile anther 
or [letaloid labelluin j ( Pedunculate anther^ 
Sketches to illustrate these were displayed. 
D. P. Young. 
