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Quercus chrysolepis Liebm.
CANYON LIVE OAK
Life   Plantae   Dicotyledoneae   Fagaceae   Quercus

Quercus chrysolepis, whole tree or vine - general
© Copyright Steve Baskauf, 2002-2011 · 4
Quercus chrysolepis, whole tree or vine - general

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Quercus chrysolepis, leaf - showing orientation on twig
© Copyright Steve Baskauf, 2002-2011 · 4
Quercus chrysolepis, leaf - showing orientation on twig
Quercus chrysolepis, inflorescence - whole - male
© Copyright Steve Baskauf, 2002-2011 · 4
Quercus chrysolepis, inflorescence - whole - male

Quercus chrysolepis, leaf - showing orientation on twig
© Copyright Steve Baskauf, 2002-2011 · 4
Quercus chrysolepis, leaf - showing orientation on twig
Quercus chrysolepis, twig - orientation of petioles
© Copyright Steve Baskauf, 2002-2011 · 4
Quercus chrysolepis, twig - orientation of petioles

Quercus chrysolepis, twig - orientation of petioles
© Copyright Steve Baskauf, 2002-2011 · 4
Quercus chrysolepis, twig - orientation of petioles
Quercus chrysolepis, leaf - whole upper surface
© Copyright Steve Baskauf, 2002-2011 · 4
Quercus chrysolepis, leaf - whole upper surface

Quercus chrysolepis, leaf - margin of upper + lower surface
© Copyright Steve Baskauf, 2002-2011 · 4
Quercus chrysolepis, leaf - margin of upper + lower surface
Quercus chrysolepis, bark - of a large tree
© Copyright Steve Baskauf, 2002-2011 · 4
Quercus chrysolepis, bark - of a large tree

Quercus chrysolepis, bark - of a large tree
© Copyright Steve Baskauf, 2002-2011 · 4
Quercus chrysolepis, bark - of a large tree
Quercus chrysolepis, bark - of a large tree
© Copyright Steve Baskauf, 2002-2011 · 4
Quercus chrysolepis, bark - of a large tree

Quercus chrysolepis, whole tree or vine - general
© Copyright Steve Baskauf, 2002-2011 · 4
Quercus chrysolepis, whole tree or vine - general
Quercus chrysolepis, fruit - as borne on the plant
© Copyright Steve Baskauf, 2002-2011 · 4
Quercus chrysolepis, fruit - as borne on the plant

Quercus chrysolepis, fruit - lateral or general close-up
© Copyright Steve Baskauf, 2002-2011 · 4
Quercus chrysolepis, fruit - lateral or general close-up
Quercus chrysolepis, fruit - lateral or general close-up
© Copyright Steve Baskauf, 2002-2011 · 4
Quercus chrysolepis, fruit - lateral or general close-up

Associates · map
FamilyScientific name @ source (records)
Achilidae  Synecdoche autumnalis @ UCR_ENT (1)
Aleyrodidae  Aleuroplatus coronatus @ CSCA_TCN (1)

Aleuropleurocelus @ CSCA_TCN (2)

Tetraleurodes perileuca @ CSCA_TCN (2)

Trialeurodes tentaculatus @ CSCA_TCN (4)

Trialeurodes @ CSCA_TCN (1)
Aphididae  Tuberculatus ( @ CSCA_TCN (86)
Asterolecaniidae  Asterodiaspis minor @ CSCA_TCN (1)
Botryosphaeriaceae  Phyllosticta agrifolia @ 350685A (1); 350685C (1); BPI (4); 350685B (1)

Phyllosticta aquifolii @ BPI (1)

Phyllosticta quercus-ilicis @ BPI (3)

Phyllosticta @ BPI (1)
Braconidae  Trioxys ( @ AMNH_PBI (5)
Cicadellidae  Ceratagallia ( @ UCR_ENT (6)

Gyponana ( @ UCR_ENT (6)

Idiocerus ( @ UCR_ENT (2)

Neocoelidia robusta @ UCR_ENT (1)

Reticopsis nubila @ UCR_ENT (3)
Coccidae  Coccus hesperidum @ CSCA_TCN (1)
Corticiaceae  Dendrothele candida @ BPI (5)
Cronartiaceae  Cronartium californicum @ BPI (4)

Cronartium cerebrum @ BPI (1)

Cronartium conigenum @ BPI (1)

Cronartium meineckii @ BPI (3)

Cronartium quercuum @ BPI (4)
Dermateaceae  Discohainesia oenotherae @ BPI (1)

Gloeosporium quercinum @ BPI (1)

Mollisia cinerea @ BPI (1)
Diaspididae  Aspidaspis densiflorae @ CSCA_TCN (1)
Hymenochaetaceae  Polystictus versicolor @ BPI (1)
Kermesidae  Allokermes branigani @ CSCA_TCN (16)

Kermes shastensis @ CSCA_TCN (9)
Leptosphaeriaceae  Coniothyrium grandisporum @ BPI (1)
Lycoperdaceae  Lycoperdon pusillum @ BPI (1)
Magnaporthaceae  Clasterosporium obclavatum @ BPI (1)
Membracidae  Platycotis minax @ UCR_ENT (6)

Telamonanthe pulchella @ UCR_ENT (3)

Telonaca ramona @ UCR_ENT (3)

Tortistilus albidosparsus @ UCR_ENT (2)
Miridae  Atractotomus agrifoliae @ UCR_ENT (2)

Ceratopsallus pantherinus @ AMNH_PBI (4)

Ceratopsallus @ UCR_ENT (4)

Insulaphylus meridianus @ AMNH_PBI (11)

Irbisia brachycera @ AMNH_ENT (1)

Irbisia californica @ UCR_ENT (1); AMNH_ENT (1)

Irbisia oreas @ AMNH_IZC (2)

Irbisia silvosa @ AMNH_IZC (59)

Notholopisca californica @ UCR_ENT (24); AMNH_ENT (5)

Phallospinophylus setosus @ AMNH_PBI (4)

Phytocoris rubrimaculatus @ UCR_ENT (2)

Phytocoris sewardi @ AMNH_PBI (2)

Pycnocoris ursinus @ AMNH_ENT (17)

Pygovepres vaccinicola @ AMNH_PBI (16)

Roburocoris exiguus @ AMNH_PBI (13)

Rubellomiris sparus @ AMNH_PBI (1)

Rubeospineus bicorniger @ AMNH_PBI (32)

Rubeospineus truncatus @ AMNH_PBI (10)

Tuxedo cruralis @ AMNH_PBI (1)
Mycosphaerellaceae  Cercospora macrochaeta @ BPI (3)

Mycosphaerella operculata @ BPI (4)
Nogodinidae  Danepteryx artemisiae @ UCR_ENT (1)

Neaethus fragosus @ UCR_ENT (12)
Peniophoraceae  Peniophora disciformis @ BPI (1)

Peniophora stratosa @ BPI (1)
Pentatomidae  Acrosternum hilare @ UCR_ENT (1)

Banasa dimiata @ UCR_ENT (1)
Phyllachoraceae  Trabutia erythrospora @ BPI (2)
Polyporaceae  Fomes robustus @ BPI (1)

Lenzites betulina @ BPI (1)

Poria spissa @ BPI (1)
Polystomellaceae  Dothidella castanicola @ BPI (1)
Rhytismataceae  Colpoma californicum @ BPI (1)
Stereaceae  Aleurodiscus disciformis @ BPI (1)

Gloeocystidiellum leucoxanthum @ BPI (2)

Stereum fasciatum @ BPI (1)
Stictidaceae  Stictis radiata @ BPI (1)
Valsaceae  Diplodina periglandis @ 381283B (1); 381283A (1)
Venturiaceae  Acantharia echinata @ BPI (10)
Xylariaceae  Daldinia concentrica @ BPI (1)

Hypoxylon malleolus @ BPI (1)
_  Dimerosporium echinatum @ BPI (16)

Gloeocystidium insidiosum @ BPI (1)

Myxarium nucleatum @ BPI (2)

Porothelium fimbriatum @ BPI (1)

Ustulina vulgaris @ BPI (2)

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Following modified from Flora of North America
   
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FNA | Family List | FNA Vol. 3 | Fagaceae | Quercus

36. Quercus chrysolepis Liebmann, Overs. Kongel. Danske Vidensk. Selsk. Forh. Medlemmers Arbeider. 1854: 173. 1854.

Canyon live oak, maul oak

Quercus chrysolepis var. nana (Jepson) Jepson; Q . wilcoxii Rydberg

Trees or shrubs , trees small to medium-sized, to 25 m, shrubs of variable size. Twigs branching at 60° angles or less, golden brown, 1-2 mm diam., flexible, densely pubescent 1st year, moderately so 2d year. Terminal buds conic, 2-8 mm, scales brown with ciliate margins. Leaves: petiole 3-14 mm, rusty-pubescent, adaxially flattened. Leaf blade oblong, acuminate, usually flat to slightly concave, 20-70 × 10-35 mm, thick, leathery, base obtuse to rounded, secondary veins 12 or more pairs, branching at ca. 50° angles, slightly raised abaxially, margins often slightly revolute with moderately thickened cell walls, entire to spinulose-dentate (especially on juvenile growth), regularly toothed, teeth terminating with mucronate to spinescent tip, apex acute or obtuse, mucronate to spinescent; surfaces abaxially glabrate to pubescent with bluish white wax layer, often obscured by golden glandular and multiradiate hairs, adaxially yellowish green, scurfy with multiradiate hairs, later in season slightly pubescent. Acorns solitary or paired, rarely in 3s or 4s; cup saucer-shaped, 4-10 mm deep × 15-40 mm wide, rims often corky and thickened, scales appressed, deeply embedded in tomentum, often appearing swollen and keeled, tuberculate; nut ovoid, 15-30 × 10-20 mm, apex blunt, glabrous; nut scar 4-10 mm diam.

Flowering usually in spring, occasionally in fall. Mountain ridges, canyons, and moist slopes; 200-2600 m; Ariz, Calif., Nev., N.Mex., Oreg.; Mexico (Baja California and Chihuahua).

Quercus chrysolepis is one of the most variable North American oaks. Historically, individuals with extreme variation in fruit and leaf characteristics led to the recognition of several varieties and forms; for example, shrubs with small leaves have been called Q . chrysolepis var. nana (Jepson) Jepson. Studies of quantitative and qualitative variation in these characteristics do not support the recognition of infraspecific taxa; geographic variation is apparent, however, based on populations with nearly stabilized character combinations that loosely define widespread variants. This oak is distinguished consistently from other species of the complex by the presence of multiradiate trichomes on both leaf surfaces (P. S. Manos 1993). The leaf morphology and branching habit present on juvenile growth, suckers, and shade forms may approach typical Q . palmeri . Similarly, various extreme forms often resemble other species of the complex.

Putative hybrids have been reported from narrow zones of range overlap with the three other North American species of Quercus sect. Protobalanus .

The Mendocin Indians considered the nuts of Quercus chrysolepis poisonous (D. E. Moerman 1986).

Updated: 2024-05-27 03:14:36 gmt
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