Vegetation
The valley has three main vegetation zones: sub-alpine between 3,200m and 3,500m which is the limit for trees, lower alpine between 3,500m and 3,700m, and higher alpine above 3,700m. The habitats include valley bottom, river bed, small forests, meadows, eroded, scrubby and stable slopes, moraine, plateau, bogs, stone desert and caves. The lower surrounding hills in the buffer zone are thickly forested. The Forest Research Institute in 1992 recorded 600 species of angiosperms and 30 pteridophytes in the valley and surroundings, discovering 58 new records for the valley of which 4 were new for Himalayan Uttar Pradesh. Of these plants, 5 out of 6 species globally threatened are not found in Nanda Devi National Park or elsewhere in Uttarakhand: Aconitum falconeri, A. balfouri, Himalayan maple Acer caesium, the blue Himalayan poppy Mecanopsis aculeate and Saussurea atkinsoni (Green & Peard, 2005). 31 species are classified as nationally rare. The dominant family is the Asteraceae with 62 species. 45 medicinal plants are used by local villagers and several species, such as Saussurea obvallata (brahmakamal) are collected as religious offerings to goddesses Nanda Devi and Sunanda Devi.The site is designated a Centre of Plant Diversity.
Characteristic of the sub-alpine zone are high altitude forests which help to retain moisture and snow and support a large number of floral and faunal communities. It is dominated by the uncommon Himalayan maple Acer caesium (VU), west Himalayan fir Abies pindrow, Himalayan white birch Betula utilis, and Rhododendron campanulatum with Himalayan yew Taxus wallichiana, Syringa emodi and Sorbus lanata Some of the common herbs are Arisaema jacquemontii, Boschniakia himalaica, Corydalis cashmeriana, Polemonium caerulium, Polygonum polystachyum (a rampant tall weed), Impatiens sulcata, Geranium wallichianum, Helinia elliptica, Galium aparine, Morina longifolia, Inula grandiflora, Nomochoris oxypetala, Anemone rivularis, Pedicularis pectinata, P. bicornuta, Primula denticulate and Trillidium govanianum. In trampled areas where past livestock congregated, Himalayan knotweed Polygonum polystachium is a rampant weed.
Read more about this topic: Valley Of Flowers National Park
Famous quotes containing the word vegetation:
“I would not have every man nor every part of a man cultivated, any more than I would have every acre of earth cultivated: part will be tillage, but the greater part will be meadow and forest, not only serving an immediate use, but preparing a mould against a distant future, by the annual decay of the vegetation which it supports.”
—Henry David Thoreau (1817–1862)
“We love to see any redness in the vegetation of the temperate zone. It is the color of colors. This plant speaks to our blood.... What a perfect maturity it arrives at! It is the emblem of a successful life concluded by a death not premature, which is an ornament to Nature. What if we were to mature as perfectly, root and branch, glowing in the midst of our decay, like the poke!”
—Henry David Thoreau (1817–1862)
“When the ground was partially bare of snow, and a few warm days had dried its surface somewhat, it was pleasant to compare the first tender signs of the infant year just peeping forth with the stately beauty of the withered vegetation which had withstood the winter ... decent weeds, at least, which widowed Nature wears.”
—Henry David Thoreau (1817–1862)