Noun : the vegetation of the Nile valley.    From Dictionary.com. 

Postglacial fire frequency and its relation to long-term vegetational and climatic changes in Yellowstone National Park: Draft final report by Cathy Whitlock.    From Wordnik.com.  [Cathy Whitlock: Is Red the New Beige? A Report from High Point] Reference

Late Quaternary vegetational history of southeastern Labrador.    From Wordnik.com.  [Late-Quaternary changes in arctic terrestrial ecosystems, climate, and ultraviolet radiation levels] Reference

As the ice sheets of the north retreated, more temperate vegetational zones spread north.    From Wordnik.com.  [5. Paleo-Indian and Archaic North Americans] Reference

The burn scar is brown is some places and more charcoal-colored in others depending on geological and vegetational factors.    From Wordnik.com.  [Archive 2009-03-01] Reference

Holocene vegetational and limnological changes in the Fennoscandian tree-line area as documented by pollen and diatom records from Lake Tsuolbmajavri, Finland.    From Wordnik.com.  [Effects of climate change on hydro-ecology of contributing basins in the Arctic] Reference

A striking feature of the region is its pronounced vegetational zonation, controlled by a combination of altitude, latitude, direction of prevailing winds, and slope exposure.    From Wordnik.com.  [Southern Rocky Mountain Steppe - OpenWoodland - Coniferous Forest - Alpine Meadow Province (Bailey)] Reference

In general, the geology along the eastern length of the island is relatively homogeneous, and vegetational composition and structure vary more with elevation than with latitude.    From Wordnik.com.  [Madagascar lowland forests] Reference

Addressing future operations, Dr. Brown emphasized that defoliation spraying should only occur when vegetational growth had been active for at least three weeks, a recommendation he had made in January.    From Wordnik.com.  [Operation Ranch Hand]

Although there are some vegetational differences from mountain range to mountain range within Ecoregion 23d, the major forest trees include Engelmann spruce, corkbark fir, blue spruce, white fir, and aspen.    From Wordnik.com.  [Ecoregions of New Mexico (EPA)] Reference

Forests range from coastal plains located at 20 meters (m) elevation up to the highest mountains at 1,200 to 1,500 m, creating a remarkable vegetational gradient from shrubs to well-developed montane forests.    From Wordnik.com.  [Serra do Mar coastal forests] Reference

As the natural habitats of this ecoregion experienced numerous vegetational shifts associated with Pleistocene climatic vicissitudes, many species are endemic and have very narrow altitudinal or isolated distributions.    From Wordnik.com.  [Madagascar subhumid forests] Reference

The topography and climate together make the area a distinct vegetational boundary zone, blending southern, northern boreal, western oceanic, eastern continental and even alpine plant species, relicts of a colder climate.    From Wordnik.com.  [Kvarken Archipelago High Coast, Finland and Sweden] Reference

There has probably never been any village on the mountains, which have been partly protected out of fear of resident spirits, but there is some vegetational evidence of former village sites on the lower levels, now overgrown.    From Wordnik.com.  [Mount Nimba Strict Nature Reserve, Guinea and Côte d'Ivoire] Reference

Vertical vegetational zonation characterizes the Alaska Range and Wrangell Mountains, beginning with dense bottom-land stands of white spruce and cottonwood on the floodplains and low terraces of the Copper and Susitna Rivers.    From Wordnik.com.  [Alaska Range Humid Tayga - Tundra - Meadow (Bailey)] Reference

In Brazil, delineations are according to the IBGE map, and the linework follows the following vegetational coverages for the Amazon floristic province: dense submontane ombrophilous forests and dense montane ombrophilous forests.    From Wordnik.com.  [Guayanan Highlands moist forests] Reference

Baruch U (1986) The late Holocene vegetational history of Lake Kinneret (Sea of Galilee).    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

While gardening yesterday, I came across a vegetational oddity that was both grotesque and poignant.    From Wordnik.com.  [Goblin Mercantile Exchange] Reference

They dominate in hot, tropical climes and now make up to 20 percent of our planet's vegetational covering.    From Wordnik.com.  [D Mag - News] Reference

If land-use is extensified or abandoned traditional landscapes are displaced by spontaneous vegetational succession.    From Wordnik.com.  [Featured Articles - Encyclopedia of Earth] Reference

Liphschitz N (1986) The vegetational landscape and the macroclimate of Israel during prehistoric and protohistoric periods.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

This legend is apparently partly astronomical and partly vegetational; and the same may be said of the following about Osiris.    From Wordnik.com.  [Pagan and Christian creeds: their origin and meaning] Reference

We have mountains of data on the retreat of the Laurentide ice sheet and the vegetational development as the ice sheet retreated from pollen records.    From Wordnik.com.  [RealClimate] Reference

The following two legends (dealing with Hercules and with Krishna) have rather more of the character of the solar, and less of the vegetational myth about them.    From Wordnik.com.  [Pagan and Christian creeds: their origin and meaning] Reference

Together these induced many harmful changes in the ecosystem: severe nutrient enrichment which degraded the hydrology and biological productivity of the lake; rapid acceleration in vegetational succession; the formation of algal blooms and toxic gases; dieback of higher submerged vegetation and bottom fauna, depriving the fish and birds of food, and increase in the size and density of the fringing reed beds, allowing wild boars, wild cats, foxes and jackals to prey on nests and on the 100-year old Dalmatian pelican colony.    From Wordnik.com.  [Srebarna Nature Reserve, Bulgaria] Reference

Vertical vegetational zonation is present.    From Wordnik.com.  [Adirondack-New England Mixed Forest - Coniferous Forest - Alpine Meadow Province (Bailey)] Reference