The brief and glorious flowering of the Arctic summer

Salix polaris - the tallest shrub of the High Arctic

One of the major factors in enjoying the sudden blossoming of the Arctic is that it takes place over a very short period which can be unpredictable. Depending on the developing of the spring, it can occur at any time during mid summer from the beginning of June to about mid July. It is quite possible to visit an area that has a rich flora and find everything in full flower one year, to find that nothing has happened yet in another, or that everything is finished. An enormous advantage with the Arctic flora is, that if you hit it right, everything will be at its best. Although not technically in the Arctic, I am including some of the flora of Iceland in this account.

My first experience of the flora of the Arctic was close to the tongue of a glacier close to the ice cap of Vatnajökull in Iceland. I was accompanying a group as a botanist, and spotted a floristically rich area close to the road, and asked the coach driver to stop. For the next half hour or so, we studied an area of stable scree that supported a most interesting flora. I had actually spotted the Glacier Buttercup, Ranunculus glacialis from the moving coach and this was a species I particularly wanted to see. As well as this, we found specimens of the Arctic Poppy Papaver radicatum and a fine saxifrage Saxifraga cotyledon. On another occasion in the north of Iceland near Akureyri, an Icelandic lecturer friend of mine lent me his car, and I drove off some distance to a river valley to see the Arctic River Beauty Chamerion latifolium. What a superb plant, especially when growing in quantity. This is a most interesting element of the Icelandic flora in that it is Nearctic, occurring nowhere further east.

Ranunculus glacialis

Papaver radicatum

Tenerife, the Jewel in a botanical crown

Isoplexis canariensis A beautiful endemic
on the roadside, Anaga Ridge.    

The endemic flora of the Canary Islands is incredible, and Tenerife is arguably the most exciting island in the archipelago for its plants. The Canary Islands sit out in the Atlantic Ocean off the coast of Africa, and have a very variable climate, ranging from the wet, warm and temperate island of La Palma in the west, to the hot, arid island of Lanzarote in the east. The flora of the Canary Islands is dominated by a number of genera such as Echium, Aeonium, Sonchus, Pericallis and Euphorbia. One or two endemic members of genera such as Lotus  and Limonium are also a fascinating feature; in fact the flora is so rich, it is difficult to summarise it by mentioning its important genera.

Looking at the flora of other Atlantic Islands, they are not as rich. Madeira has a few members of the Canarian genera, while the Azores and the flora of the Cape Verde Islands share little in common with the Canarian flora. A question that has been asked many times is; ‘where did this flora come from?’ One answer is that it is a remaining fragment of the flora of the African Sahara before it became a desert. However, the fringes of coastal, Mediterranean Africa and the mountains of Morocco, which have a relatively similar climate, bear little resemblance to the current endemic flora of the Canary Islands. There are also one or two genera with a beautiful single species in the Canary Islands that have no close relatives elsewhere. These include the beautiful bellflower Canarina canariensis and the member of Scrophulariaceae, Isoplexis canariensis.  Limonium sinuatum in Gibraltar is similar to the endemic Limonium species of the Canaries, but Europe has none of the extreme Echium species such as Echium wildpretii, simplex and pininana of the Canaries, neither are there any Aeoniums or the wonderful member of Sonchus that grace the Canarian flora. Even the far out possibility that the Canarian Flora is botanical proof of the existence of Atlantis has been aired.