Wednesday, May 28, 2025

Large Leaved Lime, Beech, Hazel and Ash. Newtimber Holt. nr Brighton. 13.05.25 South Downs

Newtimber Holt is a small but very biological interesting area of ancient woodland on Newtimber Hill. It is owned by the National Trust and managed by Saddlescombe Farm. It is probably the most interesting chalk scarp face ancient wood along the eastern South Downs. 

For a longer post on its vascular plants and lichens see: Vascular plants and Lichens at Newtimber Holt, South Downs scarp face ancient woodland, West Sussex, nr. Brighton. 17.05.25

On Large Leaved Lime

Lepraria finkii



On Beech

Enterographa crassa



Cladonia caespiticia Stubby-stalked Cladonia


Possibly Fuscidea lightfootii


Lecidella elaeochroma Lecidella Lichen


Xanthoria parietina Golden Shield Lichen

On Hazel

Graphis scripta sensu lato



On Ash

Flavoparmelia caperata Common Greenshield Lichen


Parmotrema perlatum Black Stone Flower

The orange is free-living Trentepohlia sp. alga, growing on top of the lichen (i.e. not its photobiont)



Punctelia jeckeri Powdered Speckled Shield Lichen


Hypotrachyna afrorevoluta


Parmelia sulcata Netted Shield Lichen






Wednesday, May 14, 2025

Large Leaved Limes, Beech and Ash. Rook Clift SSSI, Harting Down. 13.05.25 South Downs

"Rook Clift is a small wooded combe on the scarp slope of the South Downs. The soils are predominantly calcareous in nature, overlying the chalk of the Downs. Deeper soils occur at the foot of the slope, and also the course of a stream, arising within the wood. This site is an ancient woodland which remains in a semi-natural condition. Large leaved lime Tilia platyphyllos dominates the canopy, together with ash Fraxinus excelsior and some beech Fagus sylvatica. Large leaved lime is a nationally scarce tree, with its natural range concentrated on the limestones of the Wye Valley and Peak District. Thus the high concentration of mature coppice stools, occurring on chalk, make this site nationally important and unique within West Sussex and the South Downs Natural Area. ... The steep sided valley around the steam is more open with a canopy dominated by ash and wych elm Ulmus glabra." Nature England SSSI Specification

Large Leaved Lime Tilia platyphyllos



Enterographa Crassa

A distinctive species often dominating large areas of trunk in pure mosaics of small interlocking waxy brown thalli, spotted with small dot like apothecia, which often line up in dendritic patterns. Very common in south western and Irish woodlands on humid shaded trunks. ... On shaded bases and trunks of mature or senescent broad-leaved trees and shrubs, especially in woodlands, ... tolerant of low illumination and moderate levels of pollution. In shaded humid woods it can completely dominated large areas of trunk in pure mosaics of small interlocking thalli. British Lichen Society Enterographa crassa Also common in ancient woodland in Sussex,




Ash, Fraxinus excelsior

Elf-ear lichen, Normandina pulchella




On a fallen ash. This lichen always grows on/with bryophytes (mosses or liverworts); here with the liverwort Forked Veilwort, Metzgeria furcata. It has a characteristic shape but it is very small. It could be confused with Cladonia caespitica; but with a hand lens the bluer central part of its quamules should be obvious, which Cladonia caespitica does not have.

Mosaic with Graphis scripta, Lecanora chlarotera, possibly Arthonia radiata and a Pertusaria sp.



Lecanora chlarotera


Graphis scripta


A Pertusaria sp.


Possibly Arthoina radiata


On dead fallen ash

Isfield Ancient hedge Pedunculate Oak. Pleuros 19.11.25 Peursticta acetabulum

Qurcus robur, Pedunculate Oak Pleurosticta acetabulum  Found on deciduous trees in well-lit habitats; in the past common, but in the 21st ce...