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Notholithocarpus densiflorus


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: NotholithocarpusView Description 


Common Name: TAN OAK, TANBARK OAK

Etymology: (Greek: false Lithocarpus) Note: Molecular studies indicate closer relationship with Castanea, Castanopsis, Quercus than with Lithocarpus, from which it is now segregated.
eFlora Treatment Author: John M. Tucker
Reference: Manos et al. 2008 Madroño 55:181--190
Notholithocarpus densiflorus (Hook. & Arn.) Manos, C.H. Cannon & S. Oh
NATIVE
Habit: Shrub, tree < 30(45) m, evergreen; trunk bark gray-brown. Leaf: petioles 10--25 mm; blade 3--14 cm, oblong to +- ovate, adaxially sparsely stellate-hairy, +- glabrous in age, abaxially fine-woolly, in age +- glabrous, base +- rounded, tip obtuse, margin entire to serrate; stipules early-deciduous. Staminate Inflorescence: spike, stiff, spreading to erect, many-flowered, dense. Pistillate Inflorescence: below staminate inflorescence on same or separate stalk, 1-flowered. Staminate Flower: sepals 5--6, minute; stamens 10--12. Fruit: mature year 2; nut 1, 20--35 mm, ovoid to +- spheric, partly enclosed by cup-like involucre (cup), remnants of perianth and style persistent as small point at tip; cup (1.5)2--3 cm diam, saucer-shaped, scales slender, +- tapered, reflexed to spreading.

Synonyms: Lithocarpus densiflorus (Hook. & Arn.) Rehder
Jepson eFlora Author: John M. Tucker
Reference: Manos et al. 2008 Madroño 55:181--190
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
Key to Notholithocarpus densiflorus

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Next taxon: Notholithocarpus densiflorus var. densiflorus

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Citation for this treatment: John M. Tucker 2012, Notholithocarpus densiflorus, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=89061, accessed on April 19, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on April 19, 2024.

Notholithocarpus densiflorus
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©2019 California Academy of Sciences
Notholithocarpus densiflorus  
var. densiflorus
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©2008 Keir Morse
Notholithocarpus densiflorus  
var. densiflorus
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©2008 Keir Morse
Notholithocarpus densiflorus  
var. echinoides
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©2013 Neal Kramer
Notholithocarpus densiflorus
click for enlargement
©2019 California Academy of Sciences

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Geographic subdivisions for Notholithocarpus densiflorus:
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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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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 (fruiting time in some monocot genera).