[2] The less specific common name bastard oak may refer to either of the two varieties of Quercus sinuata, var.
For clear differentiation in common reference, American Forests uses Durand Oak[3] to mean Quercus sinuata var.
[1] The leaves range from 3–8 cm (1+1⁄4–3+1⁄4 in) long by 2–4.5 cm wide, with shapes Duncan & Duncan describe as "narrowly obovate to oblanceolate or narrowly elliptic", with "broadly rounded and bristleless" tips.
[1] John Torrey wrote the first published description of what came to be called Bigelow oak: QUERCUS OBTUSIFOLIA, var.?
BREVILOBA: foliis subcoreaceis obovato oblongis basi cuneatis, lobis brevibus obtusis supra viridibus subtus pallidis pubescentibus; fructibus sessilibus solitariis vel geminis, cupula depressa hemispherica, glande oblongo-ovato obtusa.
Acorns, somewhat rectangular or egg shaped with a length to width ratio between 3:2 and 2:1, attached at the broader end and blunted or broadly rounded at the tip, forming an angle greater than ninety degrees at the apex.
[1][10] Because it was given by Samuel Botsford Buckley to name some taxa he believed to be varieties but are now understood to be separate species, the term "durandii" is currently regarded as "nomen confusum.
"[11] Quercus sinuata, first described by Thomas Walter in Flora Caroliniana in 1788, claims no subspecies and only two varieties, var.
(variety or varietas) breviloba, a combination of Latin brevis, "short,"[15] and loba, "lobed") is an infraspecific scientific name inspired by the shallowly wavy leaf margins characteristic of the taxon.
breviloba is in central Texas[10][18] and the northern Mexico states of Coahuila, Nuevo León, and Tamaulipas.
[20] Apart from thicker acorn cups, longer nuts and smaller leaves, Quercus sinuata var.
breviloba appears as thickets of ramets that may grow as high as five meters from a single extensive underground root system.
breviloba Scrub[26] The largest known Bigelow oak in the United States appeared on the National Register of Champion Trees in 2017.
Located in Travis, Texas, the national champion specimen of Quercus sinuata var.
[27] The American Forests formula for assigning point scores to nominated trees, Trunk Circumference (in inches) + Height (in feet) + 1/4 Average Crown Spread (in feet), resulted in an overall score of 190 points.