Compilation
Quercus obtusifolia

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Name

Identification
Quercus sinuata Walter [family FAGACEAE ] (stored under name); Verified by K. C. Nixon & L. J. Dorr (TEX), 1983 Quercus obtusifolia (A. de Candolle) Torrey [family FAGACEAE ] Verified by Torr., 1859 Isotype of Quercus obtusifolia (A. de Candolle) Torrey [family FAGACEAE ] Verified by Torr., 1859 Quercus obtusifolia (A. de Candolle) Torrey [family FAGACEAE ] Verified by Not on Sheet, Quercus breviloba (Torrey) Sargent [family FAGACEAE ] Verified by C. S. Sargent,
Related name
  • Quercus carmenensis
  • Quercus undulata
  • Quercus obtusifolia
  • Quercus breviloba
  • Quercus marshii
  • Quercus sinuata

Flora

Entry for Quercus sinuata Walter var. breviloba (Torrey) C. H. Muller in I. M. Johnston [family FAGACEAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 3,
Names
Quercus sinuata Walter var. breviloba (Torrey) C. H. Muller in I. M. Johnston [family FAGACEAE], J. Arnold Arbor., 25: 439. 1944
Quercus obtusifolia D. Don var. breviloba Torrey [family FAGACEAE], in W. H. Emory, Rep. U.S. Mex. Bound., 2(1): 206. 1859
Quercus annulata Buckley [family FAGACEAE], 1860(1861). not J. E. Smith 1819, not Korthals 1839-1842(1844)
Quercus breviloba (Torrey) Sargent [family FAGACEAE]
Quercus durandii Buckley var. breviloba (Torrey) E. J. Palmer [family FAGACEAE]
Quercus durandii var. san-sabeana (Buckley ex M. J. Young) Buckley [family FAGACEAE]
Quercus san-sabeana Buckley ex M. J. Young [family FAGACEAE]
Information
Shrubs or trees, rarely small, usually moderate, (0.5-)1-3(-5) m, often clonal with multiple trunks. Leaves: petiole 2-3 mm. Leaf blade (25-)30-60(-100) × (15-)20-40(-60) mm. Acorns: cup saucer-shaped to shallowly cup-shaped, rarely deeper, to 3-8 mm deep × 8-12 mm wide, enclosing 1/4 nut, rarely more, base flat, rounded, or constricted, margin thin; nut depressed-ovoid to oblong, 7-12(-15) × 7-10 mm, glabrous.
Phenology
Flowering spring
Altitude range
200-600 m
Distribution
Mexico (Coahuila, Nuevo León, and Tamaulipas).USA Okla.USA Tex.
Discussion
Quercus sinuata var. breviloba replaces var. sinuata on the Edwards Plateau of Texas and extends south at lower elevations along the eastern side of Sierra Madre Oriental in northern Nuevo León and Tamaulipas. Although habitats of these two varieties are very different, along streams through limestone hills in central Texas the two varieties are in contact, and numerous problematic, morphologically intermediate forms may be found. The lack of broad geographic sympatry and intergradation argue for the treatment of these two taxa at varietal rank.

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