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Quercus turbinella Greene
Shrub live oak

Life   Plantae   Dicotyledoneae   Fagaceae   Quercus

Quercus turbinella
© Copyright New York Botanical Garden, 2013 · -8
Quercus turbinella

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Associates · map
FamilyScientific name @ source (records)
Anthocoridae  Orius tristicolor @ AMNH_IZC (2)
Berytidae  Neoneides muticus @ AMNH_IZC (1)
Kermesidae  Kermes shastensis @ CSCA_TCN (4)
Membracidae  Cyrtolobus @ AMNH_ENT (4)

Platycotis vittata @ UDCC_TCN (1)
Miridae  Atractotomus ovatus @ AMNH_PBI (149)

Atractotomus quercinus @ AMNH_PBI (12)

Bisulcopsallus huachucae @ AMNH_PBI (86)

Corticoris unicolor @ AMNH_ENT (2)

Deraeocoris brevis @ AMNH_ENT (1)

Deraeocoris gilensis @ AMNH_ENT (24)

Dichaetocoris anasazi @ AMNH_ENT (1)

Dichrooscytus uhleri @ AMNH_ENT (2)

Hadronema pictum @ AMNH_PBI (1)

Irbisia serrata @ AMNH_IZC (2)

Knightomiris distinctus @ AMNH_ENT (94)

Lopidea garryae @ AMNH_ENT (1)

Lopidea ute @ AMNH_PBI (2); AMNH_ENT (32)

Occidentodema mcfarlandi @ AMNH_IZC (107)

Occidentodema polhemusi @ AMNH_PBI (1)

Occidentodema @ AMNH_IZC (1)

Orthotylus n @ AMNH_PBI (2)

Phytocoris apache @ AMNH_ENT (15)

Phytocoris arizonensis @ AMNH_ENT (15)

Phytocoris decurvatus @ AMNH_ENT (54)

Phytocoris inops @ AMNH_ENT (3)

Phytocoris quercicola @ AMNH_ENT (13)

Phytocoris quercinus @ AMNH_ENT (13)

Phytocoris relativus @ AMNH_ENT (1)

Phytocoris yavapai @ AMNH_IZC (1)

Pilophorus exiguus @ AMNH_PBI (3)

Rhinacloa forticornis @ UCR_ENT (1)

Roburocoris exiguus @ AMNH_PBI (74)

Roburocoris grandiculus @ AMNH_PBI (3)

Roburocoris maculosus @ AMNH_PBI (1)

Teleorhinus tephrosicola @ AMNH_PBI (3)

Tuxedo cruralis @ AMNH_PBI (29); UCR_ENT (7)
Pseudococcidae  Anisococcus quercus @ CSCA_TCN (1)
_  Ceratocapsidea fusiformis @ AMNH_PBI (40)

Ceratocapsidea rufistigma @ AMNH_PBI (1)

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FNA | Family List | FNA Vol. 3 | Fagaceae | Quercus

68. Quercus turbinella Greene, Ill. W. Amer. Oaks. 1: 37. 1889.

Sonoran scrub oak

Quercus dumosa Nuttall var. turbinella (Greene) Jepson; Q . subturbinella Trelease

Shrubs or small trees , evergreen or subevergreen, to 4 m. Bark light gray or brown, scaly. Twigs brown to gray, 1-3 mm diam., usually tomentulose, sometimes glabrous, becoming glabrate. Buds brown, round to ovoid, 1-2 mm, minutely pubescent. Leaves: petiole 1-4 mm. Leaf blade elliptic or ovate, (1.5-)20-30 × (5-)10-15(-20) mm, thick, leathery, base cordate or rounded, margins planar or slightly crisped-undulate, coarsely 3-5-toothed or very shallowly lobed on each side, teeth spinose with spines 1-1.5 mm, secondary veins 4-8 on each side, apex acute or obtuse; surfaces abaxially yellow or reddish, usually glaucous, minutely stellate-puberulent, adaxially grayish, glaucous, or yellowish glandular, glabrous or sparsely and minutely stellate-pubescent. Acorns solitary or several, on axillary peduncle 10-40 mm; cup hemispheric or shallowly cup-shaped, 4-6 mm deep × 8-12 mm wide, covering 1/4-1/2 nut, scales tightly appressed, ovate, moderately tuberculate, grayish or yellowish puberulent; nut light brown, ovoid, to 20 × 11 mm, minutely puberulent or glabrate. Cotyledons distinct.

Flowering spring. Dry desert slopes, often in juniper and pinyon woodlands; 800-2000 m; Ariz., Calif., Colo., N.Mex., Nev., Tex., Utah; Mexico (Baja California, Sonora, and probably n Chihuahua).

Formerly, California populations of what here is referred to as Quercus john-tuckeri have been included in the concept of Q . turbinella . Quercus john-tuckeri has subsessile fruit and noncordate leaf bases as opposed to the consistently pedunculate fruit and strongly cordate leaf bases of Q . turbinella . The two species seem to be no more closely related to each other than each might be to other southwestern oaks, and Q . john-tuckeri shares at least as many characteristics with Q . berberidifolia as with Q . turbinella . Thus, treatment of these two taxa as varieties of the same species is inappropriate.

Quercus turbinella forms putative hybrid swarms with Q . gambelii (see treatment), as well as with Q . grisea .


Tucker, J. M. 1961b. Studies in the Quercus undulata complex. II. The contribution of Q . turbinella . Amer. J. Bot. 48: 329-339.

Updated: 2024-04-12 21:43:23 gmt
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