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Vascular Plants of California
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Quercus parvula var. shrevei
SHREVE OAK


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

Common Name: OAK
Habit: Evergreen or not. Leaf: stipules small, generally early-deciduous. Staminate Inflorescence: catkins, 1--several, pendent, slender, proximal on twig. Pistillate Inflorescence: in distal leaf axils, short-stalked; flower generally 1. Staminate Flower: stamens 4--10. Pistillate Flower: calyx minute, generally 6-lobed; ovary enclosed by involucre. Fruit: nut 1, partly enclosed by cup-like involucre (cup) with appressed scales (nut and cup = acorn), remnants of perianth and style persistent as small point at tip; scales tubercled to not; mature in years 1 (on younger stems) or 2 (on older stems). Chromosomes: 2n=24.
Species In Genus: +- 600 species: northern hemisphere, to northern South America, India. Etymology: (Latin: ancient name for oak) Note: Many named hybrids; those (3) treated here form widespread populations; most others occur as single individuals, and some but not all of these are mentioned here, under the first parent treated (alphabetically). Reproduction of many species declining due to habitat degradation or loss as well as disease. Quercus robur added, as waif.
eFlora Treatment Author: Thomas J. Rosatti & John M. Tucker
Reference: Manos et al. 1999 Molec Phylogen Evol 12:333--349
Unabridged Reference: Cottam, W. P., J. M. Tucker, & F. S. Santamour. 1982. Oak hybridization at the University of Utah. State Arboretum of Utah Publication No. 1. Salt Lake City; Hardin, J. W. 1975. Hybridization and introgression in Quercus alba. Journal of the Arnold Arboretum 56: 336--363; Manos, P. S., Doyle, J. J., & Nixon, K. C. 1999. Phylogeny, biogeography, and processes of molecular differentiation of Quercus subgenus Quercus (Fagaceae). Molec Phylogen Evol 12: 333--349.
Species: Quercus parvulaView Description 


Habit: Shrub 1--6 m or tree < 30 m, evergreen. Leaf: 3--9(14) cm; petiole 2--10(15) mm; blade oblong, lanceolate, or ovate to obovate, adaxially glabrous, olive-green to dark green, abaxially glabrous, generally +- dull, light olive-green, tip obtuse to acute or acuminate, margin spine-toothed (or long-tapered-dentate) to generally entire. Fruit: cup 12--15 mm wide, 6--10 mm deep, generally bowl-shaped, scales +- thin, not tubercled; nut (15)30--45 mm, barrel-shaped to ovoid, distally obtuse to +- rounded, puberulent, shell woolly inside; mature in year 2.
Note: Including all 3 varieties below, treated as a synonym of Quercus wislizeni by Jensen (1997 FNANM 3:452).
Quercus parvula var. shrevei (C.H. Mull.) Nixon
NATIVE
Habit: Tree < 30 m.
Ecology: +- moist woodland, forest; Elevation: < 1190 m. Bioregional Distribution: s NCo, NCoRI, CW (exc SCoRI), WTR. Flowering Time: Mar--May Note: Hybridizes with Quercus agrifolia, Quercus kelloggii. Treated as a synonym of Quercus wislizeni by Jensen in FNANM 3:452 (1997).
Synonyms: Quercus celata Jeps. ined.
Jepson eFlora Author: Thomas J. Rosatti & John M. Tucker
Reference: Manos et al. 1999 Molec Phylogen Evol 12:333--349
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Botanical illustration including Quercus parvula var. shrevei

botanical illustration including Quercus parvula var. shrevei

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Citation for this treatment: Thomas J. Rosatti & John M. Tucker 2014, Quercus parvula var. shrevei, in Jepson Flora Project (eds.) Jepson eFlora, Revision 2, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=76907, accessed on October 15, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on October 15, 2019.

Quercus parvula var. shrevei
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© 2007 Neal Kramer
Quercus parvula var. shrevei
click for enlargement
© 2019 Neal Kramer
Quercus parvula var. shrevei
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© 2010 Vernon Smith
Quercus parvula var. shrevei
click for enlargement
© 2007 Neal Kramer
Quercus parvula var. shrevei
click for enlargement
© 2013 Neal Kramer
Quercus parvula var. shrevei
click for enlargement
© 2019 Neal Kramer

More photos of Quercus parvula var. shrevei in CalPhotos



Geographic subdivisions for Quercus parvula var. shrevei:
s NCo, NCoRI, CW (exc SCoRI), WTR.
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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).





 

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All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.