Question: How many species of trees and other vascular plants are in Yellowstone National Park?
About the article "Yellowstone National Park", section "Flora".

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Four major tropical life zones are protected between the La Selva and its connection to Braulio Carrillo National Park.
Within this reserve, more than 5,000 species of vascular plants can be found, of which more than 700 species are trees.
La Selva hosts a large variety of epiphytes, epiphylls, and many climbing aroids.
Other common tree species include "Welfia regia", "Socratea exorrhiza", and most notably "Pentaclethra macroloba", which occur in an unusual abundance. 
Over 1,700 species of trees and other vascular plants are native to the park.
Another 170 species are considered to be exotic species and are non-native.
Of the eight conifer tree species documented, Lodgepole Pine forests cover 80% of the total forested areas.
Other conifers, such as Subalpine Fir, Engelmann Spruce, Rocky Mountain Douglas-fir and Whitebark Pine, are found in scattered groves throughout the park.
As of 2007, the whitebark pine is threatened by a fungus known as white pine blister rust; however, this is mostly confined to forests well to the north and west.
In Yellowstone, about seven percent of the whitebark pine species have been impacted with the fungus, compared to nearly complete infestations in northwestern Montana.
Quaking Aspen and willows are the most common species of deciduous trees.
The aspen forests have declined significantly since the early 20th century, but scientists at Oregon State University attribute recent recovery of the aspen to the reintroduction of wolves which has changed the grazing habits of local elk.
There are dozens of species of flowering plants that have been identified, most of which bloom between the months of May and September.
The Yellowstone Sand Verbena is a rare flowering plant found only in Yellowstone.
It is closely related to species usually found in much warmer climates, making the sand verbena an enigma.
The estimated 8,000 examples of this rare flowering plant all make their home in the sandy soils on the shores of Yellowstone Lake, well above the waterline.
In Yellowstone's hot waters, bacteria form mats of bizarre shapes consisting of trillions of individuals.
These bacteria are some of the most primitive life forms on earth.
Flies and other arthropods live on the mats, even in the middle of the bitterly cold winters.
Initially, scientists thought that microbes there gained sustenance only from sulfur.
In 2005 researchers from the University of Colorado at Boulder discovered that the sustenance for at least some of the diverse hyperthermophilic species is molecular hydrogen.
"Thermus aquaticus" is a bacterium found in the Yellowstone hot springs that produces an important enzyme (Taq polymerase) that is easily replicated in the lab and is useful in replicating DNA as part of the polymerase chain reaction (PCR) process.
The retrieval of these bacteria can be achieved with no impact to the ecosystem.
Other bacteria in the Yellowstone hot springs may also prove useful to scientists who are searching for cures for various diseases.
Non-native plants sometimes threaten native species by using up nutrient resources.
Though exotic species are most commonly found in areas with the greatest human visitation, such as near roads and at major tourist areas, they have also spread into the backcountry.
Generally, most exotic species are controlled by pulling the plants out of the soil or by spraying, both of which are time consuming and expensive.
Yellowstone National Park is home to four amphibious species and six species of reptiles.
None of the species are endangered or threatened.
The glacial nature of and dry conditions in Yellowstone are likely responsible for the relatively low number of amphibian and reptile species in Yellowstone. 
The Slovak Paradise has the highest concentration of butterflies in Slovakia with 6.06 butterflies per km².
"Kopanecké lúky" (literally Kopanecké meadows) contain exceptionally rich biodiversity in vascular plants with 75 species per m².
The National Park contains about 4,000 species of invertebrates, which include more than 2,100 species of butterflies, 400 species of bugs and 150 species of molluscs.
Vertebrates are represented by about 200 species, of which 130 are protected.
Forty species of mammals include the bear, fox, wolf, wildcat, deer, boar, and marten.
The National Park is home to 65 endangered species, including the Saker Falcon, European Otter and European ground squirrel.
Forests cover 90% of the park.
The most widespread trees are the beech, spruce, fir and pine.
The park is home to 930 species of plants, of which 35 are protected.
The park contains 6 endemic plants, which are exclusively native to it and 19 endemic plants exclusively native to the West Carpathians. 
[[File:Zoo 042 edited.jpg|thumb|right|Balkan chamois"(Rupicapra rupicapra balcanica)", a goat–antelope species found in Europe and Carpathian Mountains]]The park's vegetation comprises thick forests (66%) mountain pastures, meadows and rocky ground above the forests.
In particular, the northwestern hill slopes have thick coniferous and beech trees up to an elevation of , while in the other directions, the hill slopes are very steep, barren and rocky.
Pastures are found at elevations above in the plateaus.
Its floral wealth comprises 2,600 species of vascular plants (many of them rare and endemic) and also about 100 species of edible fungi.
Perućica forest consists of large beech trees as high as or more, with girth of about , and endemic black pines which stem from the rocky faces that provides protection to the ancient forest in the entire valley.
The trees in the Perućica primeval forest have never been logged and some of them are as old as 300 years.