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Crataegus pennsylvanica, known as the Pennsylvania thorn, [2] is a species of hawthorn native to Delaware, New York, North Carolina, Ontario, Ohio, and Pennsylvania, [2] that grows to about 8 m in height. [2] The mature trees have few thorns. [2]
Each cluster is a raceme 3–7 centimeters long with many tiny greenish-yellow to greenish-white flowers. [7] [11] The trees are polygamous-dioecious: many trees have only pollen producing flowers or seed producing flowers (strictly dioecious), but some will have both types of flowers in separate clusters, though usually one type will ...
The leaves are glossy green, petioled, alternate, and circular to heart-shaped. They are generally 5–13 cm long. Common greenbrier climbs other plants using green tendrils growing out of the petioles. [5] The stems are rounded and green and are armed with sharp thorns. The flowers are greenish white, and are produced from April to August.
This page alphabetically lists some known plant species occurring in the US state of Pennsylvania. Currently about 2,100 native and 1,300 non-native plant species are known in Pennsylvania. [1] According Pennsylvania Department of Conservation and Natural Resources, the known species make up 37% of Pennsylvania's total wild plant flora.
Crataegus (/ k r ə ˈ t iː ɡ ə s /), [2] commonly called hawthorn, quickthorn, [3] thornapple, [4] May-tree, [5] whitethorn, [5] Mayflower or hawberry, is a genus of several hundred species of shrubs and trees in the family Rosaceae, [6] native to temperate regions of the Northern Hemisphere in Europe, Asia, North Africa and North America.
giant sequoia; big tree Cupressaceae (cypress family) Taiwania: Taiwania trees; Taiwania cryptomerioides: Taiwania Cupressaceae (cypress family) Taxodium: bald or swamp cypresses (Taxodium distichum var. nutans) pond cypress Cupressaceae (cypress family) Taxodium distichum: bald cypress Cupressaceae (cypress family) Taxodium mucronatum ...
Altogether, ENTS has confirmed four trees to heights of 51 m (167 ft) or more by climb and tape drop. In the Northeast, the tallest accurately measured tree is 44 m (144 ft). This tree, named the Seneca hemlock, grows in Cook Forest State Park, PA. Above 43°N latitude, the maximum height of the species is less, under 39 m (128 ft).
Crataegus macracantha, commonly called large-thorn hawthorn and aubépine á épines longues, is a woody flowering plant native to North America. It is the most widespread North American hawthorn, and highly variable, so it has often been split into other species.