GUERNSE Y. 
Euphorbia portlandica . 
Paralias 
Peplus 
exigua 
Mercurialis annua 
Urtica urens 
Parietaria officinalis 
Ruscus aculeatus 
Juncus bufonius... 
-lamprocarpus 
Scirpus Savii 
Carex vulpina 
Phalaris canariensis 
Anthoxanthum odoratum 
Alopecurus pratensis 
Phleum pratense 
Agrostis alba 
Gastridium lendigerum .. 
Holcus mollis 
lanatus ... 
Arrhenatherum avenaceum 
Triodia decumbens 
Cynosurus cristatus 
Dactylis glomerata 
Poa annua 
trivialis 
Glyceria fluitans ... 
Festuca sciuroides 
Bromus sterilis ... 
mollis 
Brachypodium sylvaticum 
Lolium perenne .. 
Triticum junceum 
Hordeum murinum 
Portland Spurge. 
Sea Spurge. 
Petty Spurge. 
Dwarf Spurge. 
Mercury. 
Small Nettle. 
Wall Pellitory. 
Butcher’s Broom. 
Toad Rush. 
Jointed Rush. 
Mud Rush. 
Great Sedge. 
Canary Grass. 
Sweet Vernal Grass. 
Fox-tail Grass. 
Cat’s-tail Grass. 
Marsh Bent Grass. 
Nit Grass 
Creeping Soft Grass. 
Meadow Soft Grass. 
False Oat Grass. 
Heath Grass. 
Dog’s-tail Grass. 
Cock’s-foot Grass. 
Annual Meadow Grass. 
Rough Meadow Grass. 
as Floating Meadow Grass. 
Wall Fescue Grass. 
Barren Brome Grass. 
Soft Brome Grass. 
False Brome Grass. 
Rye Grass. 
Sea Wheat Grass. 
Wall Barley. 
Geology Very nearly the whole of the rocks of Guernsey belong 
"to the most ancient of formations, that of the Archean 
period, and consequently they are of immense antiquity. The 
northern portion of the island consists of diorite, sometimes ap- 
proaching hornblende-rock with syenitic and granitic veins. The 
elevated portion is mainly composed of gneiss, which forms the 
cliffs and shore from Castle Cornet on the east, round the south and 
west as far as Vazon Bay: but diorite also occurs in many places. 
Some of the gneiss towards the west of the island is highly granitoid, 
while some of the syenite has a gneissic structure. To the east of 
Lancresse there is a rather fine-grained granite clearly intrusive in 
the diorite, which approaches gneiss in structure, apparently the 
