CONVOLVULACE^E. 93 
This plant comes very near C. Epithymum, of which it is not 
improbably merely a sub-species. The heads of flowers are more 
approximate, larger, the individual flowers considerably larger, 
and the calyx not red, but white, or merely with the segments 
bordered with red; the stem forms closer coils, and the plant 
grows in large patches, killing all the cover within the area. 
According to Professor Eabington, it differs from C. Epithymum, 
in having the scales narrow, only half the length of the tube of 
the corolla, distant, with the sinus between them rounded, and the 
connecting membrane forming cup-like spaces between itself and 
the tube of the corolla; while in C. Epithymum the scales are as 
long as the tube of the corolla, and approximate below, w r ith the 
sinus between them narrow and acute. Professor Crepin, in the 
fourth Pascicule of his " Notes sur les Plantes rares et critiques 
de la Belgique," states that he finds at Rochefort a plant which 
apparently agrees with that of Professor Babington, except that 
the scales are separated by only a narrow interval with a subacute 
sinus. It is much to be wished that botanists who meet with this 
plant would examine large numbers of fresh specimens, in order to 
ascertain whether it is variable in this respect or not, as it is the 
principal character by which it can be separated from C. Epithy- 
mum : in dried specimens, the scales shrivel so much that no 
certain conclusions can be drawn from them. 
Clover Dodder. 
French, Cuscute Trejle. German, Kke Seide. 
This species of Dodder is recognized by Professor Bdbington as especially- 
attacking fields of clover, and we recollect very well seeing whole districts covered 
with it, entirely destroying the original crops. In Sussex, one field especially 
presented at a distance the appearance of having circular heaps of some red substance 
all over it, which being near the seacoast, we mistook for seaweed, until, on closer 
inspection, we discovered the red threads of the Dodder entirely overpowering the 
clover and growing in circular patches as described. 
EXCLUDED SPECIES. 
CUSCUTA HASSIACA. Pfeiff. 
This plant, which is known by many different names, as 
C. corymbosa (Ruiz, et Pay.), C. suaveolens (tier.), C. racemosa 
(Lngelman), Grammica aphylla (Lour.), and Engelmannia or 
Cuscutina suaveolens (PJ'c/JJ'.), was found by Mr. Varenne near 
Witham, Essex, in 1851 ; and also previously near Riven Ball, in 
