This section is from the book "Sub-Alpine Plants Or Flowers Of The Swiss Woods And Meadows", by H. Stuart Thompson. Also available from Amazon: Sub-Alpine Plants: Or, Flowers of the Swiss Woods and Meadows.
Probably only a variety of A. alpina, but usually growing on the older siliceous and granite rocks. The flowers are a pale, clear yellow colour and often larger than those of the white one.
The habitat and distribution, except as to geological formation, are fairly similar to the last. The seeds, collected in August usually, are difficult to germinate, but sometimes come up the second year when sown in the autumn in good, peaty soil, watered with a fine spray, and screened from the sun in a greenhouse or cold frame.
As suggested in the Gardeners' Chronicle in 1910, and in Alpine Plants of Europe, we again recommend that this Anemone be tried in flower beds, and also in turf and rough pastures in parks, etc., for clumps of these beautiful flowers would look remarkably well. But the plant dislikes lime, and probably for that reason it does not appear to be found in the Jura mountains. Specimens with double flowers were recorded many years ago from between Saas and Monte Moro, having been found by the Rev. T. Butler near the Mattmark See.
Stem 3-5 inches high, silky. Leaves pinnate, shaggy; leaflets broadly wedge-shaped, in 2-3 pairs, 3-cleft, the divisions ovate, entire, or 2-3 toothed. Involucre of 3 sessile, multipinnate bracts, villous, with yellowish red hairs. Flowers large, nearly erect. Sepals connivent, white within, reddish, and finally bluish on the outside, villous, with yellowish red hairs. Carpels oblong, villous, with long plumose beak. It opens its flowers immediately after the snow has melted, but when fertilised they are usually closed again.
Dry Alpine and sub-alpine pastures, 3500-9000 feet. April to July. Rather local and preferring siliceous soil.
1. LINARIA ALPINA.
2. LINARIA PETRAEA.
3. ERIOPHORUM VAGINATUM.
4. POLYGALA CHAMAEBUXUS.
5. DIANTHUS SUPERBUS.
6. ANEMONE PULSATILLA.
7. ANEMONE SULPHUREA.
4/7 NATURAL SIZE.
Eastern, Central, and Western Alps; Pyrenees, Riesengebirge, Alsace-Lorraine, North Germany, Carpathians, Scandinavia, Siberia. In Norway it reaches the limit of eternal snow.
Stem taller than the last. Plant villous, with white, shining glandular hairs. Leaves pinnate, with segments in 2-3 pairs, pinnatifid, the lobes 2-3 cleft; ultimate segments entire or 3-cleft. Bracts of involucre sessile, linear-lanceolate, very hairy. Flowers usually pale violet, rarely white or rose-coloured, large, erect, solitary. Sepals 6, elliptic, silky outside. Carpels with long plumose beard.
Southern slopes and dry pastures at about 5000 feet, though occasionally descending lower. It usually blooms in May and June.
Carpathians; Eastern Alps, Switzerland (only in Valais), Savoy, Dauphiny, Provence, Italian Alps, Poland, Southern Bohemia.