198 MU. C. IIEII) ox TllK FLOUA OF THE OUOMEU FOUE«T-iiEO. 
Alxus olutinosa. Linn. Alder. 
Leniale catkins abundant at many localities. 
Betula alba. Linn. Birch. 
Wlierever leaves arc iireserved, the Bircli is found. 
Birch twigs are also found in the estuarine beds. 
Salix, 3 sp. Willows. 
Among the leaves in ironstone arc three species of 
Willow found at Happisburgb. Willow wood is 
also common in the estuarine beds. 
Moxocotvleboxs. 
"^Sbauoaniem uamosum. Huds. Bur-reed. 
Xo Bur-reeds have been found in any part of the 
Cromer Borest-bed, except the peaty deposit at 
I’akefield, where the many-ribbed seeds of the above 
• species are abundant, and at Beeston, from whence 
a single specimen has recently been determined. 
/S. simplex is characterised by smooth, and S. neglect um 
by few-ribbed seeds. 
ruTAMOOETux iiETEROBHYLLUS. Screb. Various-lcavcd Bondwccd. 
Drupes of this Pondweed are A'cry abundant in 
lacustrine cla}''S at all localities except Pakefield. 
emsrus. Linn. Curly Pondweed. 
Detached drupes are abundant at Beeston, Side- 
strand, and Mundesley, while at Trimingham the 
fruit occur in clusters, though the stems have 
entirely disappeared. 
• TRiciioiuE.s. Cham. Slender Pondweed. 
Tliough one of the rarest of our living Britisli 
I’ond weeds — being entirely confined to bTorfolk — ■ 
ilrupcs of this species are very plentiful at Beeston, 
Sidcstrand, IMundcslcy, and Pakclicld. 
■ rECTiNATua. Linn. Fennel Pondweed. 
P. Jlabeltatas of the Cromer Memoir.) 
Drupes of this species, often | inch, arc common in 
most of the lacu.striuc clays. 
