Butterburr (Petasites albus) - Butterburr is an invading alien flowering in February.

Charlock (Sinapis arvensis)  ploughed fields spring to life, not only with crops, but also with agricultural weeds.

Coltsfoot  (Tussilago farfara) Coltsfoot is a native plant flowering in March.

Common Bird’s-foot-trefoil (Lotus corniculatus)

Common Dog-violet (Viola riviniana)

Common Ragwort (Senecio jacobaea)  Yellow-  poisonous to most animals and a serious pest in the countryside.

Common Sedge or Black Sedge (Carex nigra)

Cow Parsley (Anthriscus sylvestris)

Cross-leaved Heath (Erica tetralix) In the wetter parts the  shows flowers of a paler pinky purple than Heather or Bell Heather

Eyebright (Euphrasia species.)  There are several species of eyebright 

Few-flowered Garlic (Allium paradoxum) This is an alien plant to Britain, coming from the Caucasus.

Fragrant Orchid (Gymnadenia conopsea) This pink orchid is very fragrant, so bend down and have a sniff! There are very few pink orchids in Caithness

Goat Willow Catkins - Male catkins of the  make an early show.

Great Sundew (Drosera anglica)  Leaves are covered in sticky hairs which catch small insects

Hawthorn (Crataegus monogyna)

Hazel Catkins (Corylus avellana) Catkins are the male flowers of the hazel bush.

Heather (Calluna vulgaris) On the peaty moorlands the heather comes into flower in early August to colour the hills and moors with purple.

Holy-grass (Hierochloe odorata)

Lesser Celandine (Ranunculus ficaria). Lesser Celandine has heart-shaped leaves with a dark mark.

Magellan Daisy Senecio smithii. This plant is a native of S Chile and S Argentina, which, for unknown reasons was brought home by whalers and planted in gardens in Caithness and Orkney.

Marsh Thistle (Cirsium palustre)

Mayflower  (Cardamine pratensis) Found In ditches and damp grassy places in May.

Meadowsweet (Filipendula ulmaria In the wet meadow the  dominates to the exclusion of many other plants.

Narrow Small-reed (Calamagrostis stricta). Three of the Caithness lochs have around their margins fairly sweet, muddy wet ground which is the home of the nationally rare

Oyster Plant(Mertensia maritima) This is a beautiful plant that grows on seashores around the north and east of Scotland.

Perennial Sow-thistle (Sonchus arvensis) stands three feet high with strong prickles on its leaves.

Phacelia (Phacelia tanacetifolia). A late-flowering species that has appeared this year for the first time in cornfields and set-aside land is the blue flowered  It is an annual plant introduced from California with seed mixtures.

Primrose (Primula vulgaris) Primroses prefer grassy slopes and flower early.

Red Campion (Silene dioica)

Rosebay Willowherb (Chamerion angustifolium) which forms dense colonies here and there adding a mass of pinkish purple colour to the landscape.

Round-leaved Sundew (Drosera rotundifolia.)  The huge areas of peatland in Caithness and North Sutherland are of international importance because of the world scarcity of this type of place. 

Salmonberry (Rubus spectabilis)
This plant, alien to Britain, has escaped from gardens and invaded the surrounding land to become a serious nuisance in a few places.

Scotch Rose or Burnet Rose (Rosa pimpinellifolia)
This is the easiest Caithness rose to identify. It has many fine prickles instead of the usual strong spines of other roses.

Scottish Primrose (Primula scotica.)  This miniature beauty grows only in Caithness, Orkney and North Sutherland, and nowhere else in the world. And see Scottish Primrose (Primula scotica)

Scottish Smallreed (Calamagrostis scotica.) There is only one locality in the world where this grass is known, and that is a boggy area near Castletown.  Flowers in August.

Sweet Cicely (Myrrhis odorata)
In May the Sweet Cicely throws up its light green fern-like leaves and puts out its umbels of tiny white flowers. It is not a native plant of Caithness

Thrift or Seapink (Armeria maritima)

Twayblade (Listera ovata)
The Twayblade orchid likes well drained calcium-rich soil, so it occurs commonly on dune links turf such as at Dunnet, Sandside and Keiss, but it is scattered more widely across the county where the environment is suitable.

Wick Sedge or Estuarine Sedge (Carex recta.) There are only three sites for this plant in Britain.

Wild Pansy (Viola tricolor)

See Also
Plant Links
Skye Flora - Great and growing listing