Quercus palustris ‘Pringreen’ (Green pillar pin oak)

Pin oak is native to the northeastern United States and southeastern Canada. This cultivar, ‘Pringreen,’ commonly sold under the trade name GREEN PILLAR, was discovered by William Flemer, III of Newplant Associates in a mass planting of Quercus palustris ‘Crownright’ seedlings in 1994.

Plants: 50–60′ tall ⨉ 12–15′ around (15–18 ⨉ 3.7–4.6 m). Bark is smooth and gray. The tree’s crown is upright, narrow, and columnar.

Leaves: 1¾–6 ⨉ 1¾–4½″ (5–16 ⨉ 5–12 cm), with 5-7 lobes. Each lobe has 5-7 teeth. The sinuses—indented areas—are U-shaped and very deep. Leaves are hairless, apart from a distictinve tuft of pale orange-brown down on the lower leaf surface where lobe veins join the central vein. Leaves are glossy and dark green, becoming deep red to scarlet in the fall.

Flowers: Inconspicuous green catkins, both male and femalel, appear on the same tree (“monoecious“) in the spring,

Fruits: Acorns are rounded, to ½″ (1.3 cm), with caps that cover ¼ to ⅓ of the fruit. Acorn production begins when the three is 15-20 years old.

Kingdom	Plantae	Plants, but not fungi, lichens, or algae (from Stearn's Botanical Latin)
Subkingdom	Tracheobionta	Vascular plants—plants with a “circulatory system” for delivering water and nutrients
Division	Magnoliophyta	Flowering plants, also known as angiosperms
Class	Magnoliopsida	Dicotyledons—plants with two initial seed leaves
Subclass	Rosidae	Roses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more
Order	Fagales	Birch, she-oak, beech, walnut, bayberry, others
Family	Fagaceae	Beech familhy
Genus	Quercus	Latin for “oak”
Species	palustris	Growing in marshes

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Range: Zones 4-8:

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