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Trees reach a typical height of 12–30 metres (40–100 feet) with a diameter of 0.61–1.22 m (2–4 ft). [8] It is a very upright tree with a straight trunk and narrow crown that grows scraggly with age. [ 9 ]
325 million years ago Illinois was covered in heavily forested deltaic swamps. [11] The trees composing this Pennsylvanian forest included Cordaites, scale trees, and seal trees. [12] Some of these trees could grow over 100 feet high. [11] The rest of the flora included scouring rushes, Sphenophyllum, ferns, and seed ferns.
Arbutus menziesii is an evergreen tree about 10 to 25 metres (33 to 82 feet) in height, but in the right conditions up to 30 m (98 ft). The trunk is usually about 60 centimetres (24 inches) thick. [4]
Red pine is a coniferous evergreen tree characterized by tall, straight growth. [6] It usually ranges from 20–35 metres (66–115 feet) in height and 1 m (3 ft 3 in) in trunk diameter, exceptionally reaching 43.77 m (143 + 1 ⁄ 2 ft) tall. [7] The crown is conical, becoming a narrow rounded dome with age.
The tree of heaven is a very rapidly growing tree, possibly the fastest-growing tree in North America. [68] Growth of 1 to 2 metres (3 to 7 ft) per year for the first four years is considered normal. Shade considerably hampers growth rates. Older trees, while growing much slower, still do so faster than other trees.
Illinois' ecology is in a land area of 56,400 square miles (146,000 km 2); the state is 385 miles (620 km) long and 218 miles (351 km) wide and is located between latitude: 36.9540° to 42.4951° N, and longitude: 87.3840° to 91.4244° W, [1] with primarily a humid continental climate.
It can often be found growing on the sides of roads, particularly on southern exposures, needing full sun and ample moisture during its short growing season. The mature plants often grow and flower in mowed areas. In many parts of its native habitat, road sides are only mowed twice a year. In the late spring and again in late fall.
Fagus grandifolia is a large deciduous tree [6] growing to 16–35 metres (52–115 feet) tall, [7] with smooth, silver-gray bark.The leaves are dark green, simple and sparsely-toothed with small teeth that terminate each vein, 6–12 centimetres (2 + 1 ⁄ 4 – 4 + 3 ⁄ 4 inches) long (rarely 15 cm or 6 in), with a short petiole.