He wrote Flora silesiaca, and named many plants, notably Quercus petraea.
This is an ancient estuarine woodland of sessile oak Quercus petraea on the steep outer banks of the Western Cleddau estuary.
Both Sessile Oak Quercus petraea and Pendunculate Oak Quercus robur, Britain's two native oaks are used and also some introduced species such as Turkey Oak Quercus cerris and Evergreen oak Quercus ilex.
Quercus robur | Quercus ilex | Quercus petraea | Quercus alba | Quercus cerris | Quercus virginiana | Quercus rubra | Quercus garryana | Quercus acutissima | Quercus palustris | Quercus minima | Quercus fusiformis | Quercus castaneifolia | Quercus agrifolia | sand live oak (''Quercus geminata'') | Quercus × warei | ''Quercus'' × ''warei'' | Quercus suber | ''Quercus robur'' | Quercus peninsularis | Quercus lusitanica | Quercus lobata | Quercus laceyi | Quercus ilicifolia | Quercus hemisphaerica | Quercus havardii | Quercus glauca | Quercus frainetto | Quercus engelmannii | Quercus copeyensis |
Of particular rarity in the county are the areas of English oak (Quercus robur) and Cornish oak (Quercus petraea) with small-leaved lime (Tilia cordata) coppice.
The main tree species found on the site include ash (Fraxinus excelsior), common beech (Fagus sylvatica), small-leaved lime (Tilia cordata) and wych elm (Ulmus glabra), as well as English oak (Quercus robur) and sessile oak (Quercus petraea).
Apart from large areas of moorland, small areas of Mynydd Fforest have been re-taken by native trees, such as Mountain Ash, Sessile Oak, Holly, Hazel, Hawthorn, Blackthorn, and Ash.
The most abundant tree species is Sessile Oak (Quercus petraea), the shrub layer is very sparse and the ground flora includes Bracken, Bilberry and a variety of mosses.