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Quercus durata var. gabrielensis

Higher Taxonomy
Family: FagaceaeView DescriptionDichotomous Key

Common Name: OAK FAMILY
Habit: Shrub, tree, evergreen or not; monoecious. Leaf: simple, alternate, petioled; margin entire to lobed; stipules small, generally deciduous. Staminate Inflorescence: catkin or stiff spike, many-flowered. Pistillate Inflorescence: 1--few-flowered, generally above staminate inflorescence; involucre bracts many, generally overlapping, flat or cylindric. Staminate Flower: calyx generally 4--6-lobed, minute; petals 0; stamens 4--12+. Pistillate Flower: calyx generally 6-lobed, minute; petals 0; ovary inferior, style branches generally 3. Fruit: 1 nut subtended, partly enclosed by scaly, cup-like involucre or 1--3 nuts subtended, enclosed by spiny, bur-like involucre; mature years 1--2. Seed: generally 1.
Genera In Family: 7 genera, +- 900 species: generally northern hemisphere. Note: Wood of Quercus critical for pre-20th century ship-building, charcoal for metallurgy; some now supply wood (Fagus, Quercus), cork (Quercus suber), food (Castanea, chestnut). Lithocarpus densiflorus moved to Notholithocarpus.
eFlora Treatment Author: John M. Tucker, except as noted
Scientific Editor: Thomas J. Rosatti, Bruce G. Baldwin.
Genus: QuercusView DescriptionDichotomous Key

Habit: Tree 5--15 m, deciduous; trunk bark scaly, +- gray; twigs tomentose. Leaf: 4--7 cm; petiole 3--10 mm; blade oblong to obovate, adaxially glabrous to sparsely hairy, green, +- shiny, abaxially densely appressed-stellate-hairy, +- pale green, tip obtuse to rounded, margin lobes 2--6(8) per leaf, shallow, generally pointed. Fruit: cup 10--20 mm wide, 6--10 mm deep, hemispheric, scales tubercled, canescent; nut 20--35 mm, conic-oblong to ovoid, distally acute to +- obtuse, shell glabrous inside; mature in year 1.
Note: Considered a species by Greene but derived from hybrids involving Quercus pacifica, Quercus lobata, perhaps others; needs study.
Species: Quercus durataView Description 

Common Name: LEATHER OAK
Habit: Shrub to small tree 1--5+ m, evergreen; twigs tomentose, glabrous in age or not. Leaf: 1.5--3 cm; petiole < 5 mm; blade oblong to elliptic, adaxially convex, puberulent, dull green, abaxially short-hairy, pale green, tip spiny or abruptly pointed, margin wavy, often rolled under, toothed, teeth spine-tipped or abruptly pointed. Fruit: cup 12--18 mm wide, 4--6 mm deep, bowl-shaped, scales tubercled; nut 15--25 mm, ovoid to cylindric, distally obtuse to rounded, shell glabrous inside; mature in year 1.
Note: Hybridizes with Quercus berberidifolia, Quercus garryana (Quercus ×subconvexa J.M. Tucker).

Quercus durata var. gabrielensis Nixon & C.H. Mull.
Leaf: adaxially +- convex; abaxially densely short-hairy when young; margin rolled under or not.
Ecology: Chaparral, granitics; Elevation: 450--1000 m. Bioregional Distribution: se WTR, SnGb (s slope). Flowering Time: Apr--May Note: Hybridizes with Quercus engelmannii (Quercus ×ewanii I.M. Turner, replacement name for Quercus ×grandidentata Ewan, a later homonym), Quercus lobata Née (Quercus ×townei Palmer).
eFlora Treatment Author: John M. Tucker
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory

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Citation for this treatment: John M. Tucker Quercus durata var. gabrielensis, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on November 24, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017, Jepson eFlora,, accessed on November 24, 2017.

Quercus durata var. gabrielensis
click for enlargement
© 2015 Keir Morse
Quercus durata var. gabrielensis
click for enlargement
© 2015 Keir Morse
Quercus durata var. gabrielensis
click for enlargement
© 2015 Keir Morse
Quercus durata var. gabrielensis
click for enlargement
© 2015 Keir Morse
Quercus durata var. gabrielensis
click for enlargement
© 2015 Keir Morse
Quercus durata var. gabrielensis
click for enlargement
© 2015 Keir Morse

More photos of Quercus durata var. gabrielensis in CalPhotos

Geographic subdivisions for Quercus durata var. gabrielensis:
se WTR, SnGb (s slope).
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

View elevation by latitude chart
Data provided by the participants of the Consortium of California Herbaria.
View all CCH records

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.