Quercus imbricaria Michx.

Favoured by North American colonists for its wood that was especially suited to the manufacture of roof tiles, Quercus imbricaria was introduced early to cultivation and has been widely planted around the world. Dirr and Warren (2019) claim they have observed it with every habit permutation imaginable, save fastigiate: in youth, pyramidal to upright oval, at maturity, haystack-shaped to broad-rounded, often with drooping lower branches. It is adaptable and was noted to thrive on clay that in drought years ‘contracts to form puzzle pieces’. Leaves show orange-yellow to dark red autumn tones, but they often persist on the tree through winter, remaining green late into the season until a hard freeze browns them. This marcescent foliage keeps a glossy surface and typically clings to the branches until spring, giving the tree notable ornamental appeal. The drawn-out leaf abscission may irk the perfectionist gardener, while others will appreciate ‘the windblown leaves and rustling music’ (Dirr & Warren 2019).

Quercus imbricaria favours moist conditions but proves surprisingly tough, showing up on drought-prone sites such as shallow clays, deep sands, and gravelly substrates. Across its range, it occupies both riparian zones and uplands, occurring from the Great Lakes through the central US to the northern Appalachians and Ozarks, with scattered outliers eastward to New York and southward into the Mid-Atlantic. The Missouri River forms its western limit, and isolated populations also exist in Arkansas. While it tends to inhabit bottomlands in the eastern portion of its range, it shifts to drier uplands and slopes farther west. It tolerates a wide span of habitats – including disturbed areas – ranging from ravines and streambanks to sandy clays, sandstone escarpments, and moderately dry hill country (Miller & Lamb 1985; le Hardÿ de Beaulieu & Lamant 2010). It is hardy to USDA Zone 4, and according to Dirr (2009) it does not perform as well in Zone 7 or 8 as it does further north in the US.

Sternberg (2004) reports that Quercus imbricaria is one of the oaks most susceptible to leaf scorch (Xylella fastidiosa), lamenting the loss of several fine specimens to that disease at his Starhill Arboretum in Illinois, USA.

Quercus imbricaria was introduced to cultivation in 1786 by John Fraser at his American Nursery in Sloane Square, London, according to Aiton (1813), but was reported as rare by Loudon in 1838, and in 1910, Elwes and Henry confirmed that no ‘old trees’ existed in the UK, presumably referring to trees planted in the late 18th century. They did mention two relatively young trees at Bayfordbury Park, Hertfordshire, said to be planted in 1836, as well as trees in several other gardens, the largest 18 m × 44 cm dbh. It is now widely planted in parks in the UK, and the girth and height champion is at Syon Park, across the River Thames from Kew, measuring 28.2 m × 97 cm. A tree next to it had reached 29.7 m in 2013 but has since died. A tree at Bicton Park, Devon, also demised, had reached a trunk diameter of 98 cm in 1967. Of the trees with a recorded planting date, the oldest is at Stanage Park, Walkes, planted in 1920 (19 m × 73 cm in 2023), while a tree at Royal Botanic Gardens, Kew was planted in 1930 (18 m × 73 cm in 2022) (The Tree Register 2025).

Larger trees are recorded in Europe, where according to le Hardÿ de Beaulieu & Lamant 2010 the species grows well in the west, though it would prefer the continental region due to its preference for summer heat. A relatively slender tree at Schlossgarten, Hanau, Germany, reached 32 m × 90 cm in 2014, while the largest diameter is recorded for a tree in Hengelo, Overijssel, the Netherlands, measuring 29 m × 134 cm in 2021 (Monumental Trees 2024). In the US, the national champion grows in Jefferson, Kentucky and trumps the European trees, reaching 35 m with a trunk 153 cm in diameter (National Champion Tree Program 2025). It is popular there as a landscape tree and has been used for lawns, streets, parks, golf courses and other large areas. Dirr (2009) observes that it accepts pruning well and has been used for hedges, as the leaves persist into winter and aid in screening or as a wind break. It has been planted widely as a street tree in New York City, notably on West Street near the Freedom Tower, where in winter the marcescent foliage sets the trees apart from their deciduous neighbours (Cameron 2022).

Trees in cultivation appear to grow fast and fruit soon: three trees at Arboretum des Pouyouleix, France, planted in 2003 and 2004, were between 15 and 16 m tall in 2021, and starting around 2015, each spring seedlings were found growing under them, though acorns were hard to spot on the trees (B. Chassé, pers. comm.).

Quercus imbricaria has long been in cultivation in the Southern Hemisphere as well. A tree by the Anglican Cemetery in Tauranga, New Zealand, is estimated to have been planted around 1890 and was 17.6 m tall in 2012, with a trunk diameter of 128 cm (New Zealand Notable Trees Trust 2025). At Hackfalls Arboretum, New Zealand, there are four trees sourced from Barnes Arboretum, Pennsylvania, USA, accessioned in 1970, the tallest 15 m in 2005 and the thickest trunk 82 cm in diameter in 2020. Several hybrids between Q. imbricaria and other red oaks are recorded at Hackfalls, grown from acorns collected in 1976 from a Q. imbricaria at Eastwoodhill Arboretum, since lost (Hackfalls Arboretum 2025). In Argentina, Laharrague (2001) recorded a Shingle Oak 22 m × 140 cm, with a 29 m crown spread, estimated to have been planted around 1920.

The species was described in 1801 by André Michaux, who chose the epithet and the common name Shingles Willow Oak because he noted that the French colonists in Illinois used its wood to make roof tiles (shingles). The word imbricaria means ‘related to imbrex’, which in Latin is a roof tile commonly used in an overlapping formation. The English word ‘imbricate’ (= ‘overlapping each other’) derives from the same root. It is interesting to note that this confused Aiton (1813), who listed this species with the common name ‘Tile-cup’d Oak Tree’, assuming that it referred to the arrangement of scales on the cupule, which are indeed often described as imbricated. The ultimate root of the word in Latin is imber (‘rain, storm, stormcloud’), related to ‘nimbus’, the name in English for a large rain cloud, indicating that the name for the tiles derived from their purpose to protect from precipitation (Wiktionary 2025). The taxonomy of the species has been uneventful, save for an unsuccessful attempt by Spach (1841) to place it as a variety of Q. phellos.