Weekend Oak Feature: Oak Sapling

Quercus phanera

Name: 
Quercus Phanera Chun 1947

Synonyms:
Cyclobalanopsis phanera (Chun) Hsu & Wei Jen 1979
basellata Chun & W.C.Ko 1958
insularis Chun & P.C.Tam 1965, nom. illeg. not Borzi 1911

Local Names: 
liang ye qing gang

Range: 
China (Guangxi, Hainan)

Description

Drawing

More Quercus phanera information: 

eFloras

IPNI


Additional information and links on the genus Quercus:
Plants List: Quercus
Oaks of The World 
Quercus images on Google
Oak images on Google
List of genus Quercus and subgenus Cyclobalanopsis
USDA Plant List Search: (Type Quercus)
eFlora - Quercus

Quercus kerrii

Name:   Quercus kerrii Craib

Synonyms:    Cyclobalanopsis kerrii (Craib) Hu 1940; dispar Chun & Tsiang 1947, nom. illeg.; vestita Rehd. & Wils. in Sarg. 1916 not Griff. 1848

Local Names:   mao ye qing gang

Growth Habit:  usually 7-8 m, but reaches 20 m

Acorn:    acorn globose flattened, 0.7-1.3 cm high, 2-2.8 cm in diameter; apex flat or depressed;  several on a 4 cm long peduncle; slightly raised basal scar, 1-2 cm wide; enclosed 1/4 to 1/2 by cup; cup flat, 0.5-1 cm de haut, 2-3.5 cm in diameter, with bracts in 7-11 pubescent, entire or denticulate concentric rings; stylopodium persistent, greyish pubescent; maturing in 1 year; (Oaks of The World)

Leaves:    10-24 x 3-8 cm; evergreen or nearly so; leathery; oblong-elliptic, lanceolate or oblong-lanceolate; margin apical 2/3 serrate;  apex slightly obtuse to shortly acuminate; base rounded or broadly cuneate; shiny green above, hairy beneath; midrib weakly raised underside; 10-14 veins pairs; tertiary veins evident abaxially; petiole tomentose 1-2 cm long; (Oaks of The World)

Range:    SW China; Thailand; Vietnam; Myanmar; Laos

References:    
eFlora
Oak ICRA Checklist
Illustration
The Plant List
Oaks of the World 
International Plant Name Index 
Point Map of Quercus kerrii
Culture Sheet

Additional information and links on the genus Quercus:

Plants List: Quercus
Oaks of The World 
Quercus images on Google
Oak images on Google
List of genus Quercus and subgenus Cyclobalanopsis
USDA Plant List Search Page
eFlora - Quercus 

Quercus trojana

Name: Quercus trojana.

Synonyms: Quercus aegilops, Quercus aegilops var. macedonica, Quercus grisebachii, Quercus macedonica, Quercus trojana, Quercus trojana f. macrobalana. 

Local Names: Trojan Oak, Macedonian Oak.  

Acorn: 2.7-4.5 cm long, 1.8-2 cm in diameter; apex truncate; cup sessile or nearly so, 2.5 cm in diameter, with long, spreading scales, enclosing 2/3 of nut; maturing in 2 years  

Leaves: 3-9 x 2-5 cm; semi-evergreen; oval lanceolate; leathery; apex pointed, base rounded or subcordate; margin toothed, with 6-12 pairs of mucronate teeth; both sides glabrous and slightly glaucous; petiole 0.2-0.5 cm, sparsely hairy.  

Range: Native to southeast Europe, Italy, southwest Asia,  the Balkans, western Turkey.

References: (1) (2) (3)

Quercus sinuata

Name: 
Quercus sinuata.

Synonyms: 
Quercus durandii,
Quercus undulata,

Local Names: 
Bastard Oak,
Bastard White Oak,
Durand Oak,
Bigelow Oak. 

Acorn: 1.2-1.5 cm; almost round; brown; sessile or nearly so; singly or paired; cup shallow, enclosing 1/4 or less of nut, with appressed, smooth, greyish scales; maturing in 1 year; 

 Leaves: 5-12 x 2.5-6 cm; oblanceolate; apex broadly rounded; base cuneate; margin entire or with few lobes or only wavy near apex; rich green, hairless above; dull green, pubescent beneath with 8-10 rays stellate hairs; 7-11 vein pairs; petiole 3-5 mm long.

References:
www.jstor.org
US Forestry Service
www.ars-grin.gov
Oaks of the World

Quercus skinneri

Name:
Quercus skinneri Benth 1841

Synonyms:
chiapasensis Trel. 1915
grandis Liebm. 1854
grandis var. tenuipes Trel. 1924
hemipteroides Mull. 1937
salvadorensis Trel. 1930
trichodonta Trel. 1938

Local Name:
chicharro



Quercus skinneri is found in Mexico, Guatemala, Honduras and El Salvador. It is a threatened by habitat loss. It can grow up to 35 meters tall.

References: 
Oaknames.org
Oaks of the World
The Plant List

Quercus merrillii

Acorns and leaves are not drawn on same scale.

Quercus merrillii or Cyclobalanopsis merrillii is the only oak specie in the Philippines and is found in the province of Palawan. It may also be found in the island of Borneo. This specie is a shrub. The 2 cm. acorn is ovoid, brown and hairless (glabrous) half enclosed by a sessile cup with 7 to 8 denticulate rings. The 2-4 x 1-2 cm leaves are oval, rounded at both ends or attenuate at base; leathery but thin;  entire or remotely crenate in apical 1/3; shiny green above, whitish beneath; 6-8 pairs of secondary veins, raised beneath; petiole 2-3 cm long. (1)

Illustration: An array of four individual art cards. Pigment ink on 2.5"x3.5" Bristol boards.

Quercus x comptoniae

Quercus x comptoniae (Charles Sprague Sargent, 1918) is a hybrid of Quercus lyrata (Overcup Oak) and Quercus Virginia (Live Oak). Synonyms: Lyrata x Virginiana, Compton Oak. Quercus x comptoniae can grow to a height of approximately 35 meters. It is native to Texas and Louisiana. It may be found in Alabama, Florida, Louisiana, Mississippi, South Carolina, Texas and Virginia. The acorns are an source of food for deer, wild turkey, black bear, northern bobwhite and ducks. Leaves and acorns are not drawn on same scale.

Further Reading: (1) (2) Images: (1) (2) (3)

Quercus nigra

Quercus nigra, Water Oak, Possum Oak, aquatica (Lam.) Walt. 1788, hemisphaerica var. nana (Willd.) Sarg. 1895, microcarpa Small 1901, nana Willd. 1805, nigra var. aquatica Lam. 1785 nigra f. microcarya (Small) Sarg. 1918, nigra var. tridentifera Sarg. 1918, nigra var. heterophylla (Ait.) Ashe, uliginosa Wangenh. 1787 

Water oak is associated with the following oak species: willow oak (Quercus phellos), laurel oak (Q. laurifolia), Nuttall oak (Q. nuttallii), cherrybark oak (Q. falcata), white oak (Q. alba), swamp chestnut oak (Q. michauxii).  It is a deciduous tree and can grow up to 100 feet. The leaves are variable and fall in late winter. The acorn is globose, enclosed 1/3 to 1/4 by a shallow broad cup. Further reading: (1) (2) (3)

Quercus virgiliana

Quercus virgiliana, Ten. 1835, pubescence, acorn, leaf.  Pen and ink on 3.5"x2.5" Bristol board. I had a difficult time capturing the scales of this acorn; a lot of patterns and texture.

I chanced upon this almost perfectly ovoid acorn, Quercus virgiliana because I made a typographical error in searching for interesting facts about Quercus virginiana. What a magnificent discovery! This acorn is produced by the most beautiful and largest heritage oak trees in Southern Europe, East Corsica, Italy to the Black Sea. Quercus vigiliana or Roverella. There appears to be quite extensive documentation of heritage specimen throughout Italy. Check out these beautiful acorn images here and the majestic  1000 year old tree, the largest in Italy; a 250-300 year old specimen here and an estimated 400 year old tree here.

The leaf of the Quercus virgiliana is broadly oboval, 10-16 cm., flat with a rounded or cordate base. It has 5 to 7 pairs of often rounded lobes. It is woolly beneath. The petiole measures 1.5-2.5 cm.. The acorn is 3-4 cm in diameter, on a short peduncle, almost sessile; the cup has flat , lanceolate, reflexed scales. Ref: Oaks of the World

Quercus obconica

Leaf and influrescens are not drawn on same scale.

Quercus obconica (Y.C.Hsu & Z.K.Zhou 1998). Synonyms: Cyclobalanopsis litoralis (Chun and Tam ex Hsu &Wei Jen 1979), Cyclobalanopsis macrocalyx var. litoralis (Hsu and Jen), Deng &Z.K.Zhou 2005

Found in China (Hainan) where it eaches 15 meters tall. It is not hardy.

The leaves measure 8-15x4-10 centimeters with 6-9 curved vein pairs, abaxial inconspicuous tertiary veins; ovate to obovate; leathery; apex is obtuse or shortly pointed; cuneate base, entire margin or slightly denticulate near apex, greyish green beneath, tomentose then later glabrous.

Fruits: May be 3 to 5 together. Measure 3 to 4.5 centimeters L, 2.2 to 2.8 centimeters W, ovoid to cylindrical with rounded apex. Enclosed 1/2 or 1/3 by cup; 3-5 mm thick, 2-3 cm H by 2.5-3 cm W, tomentose outside and silky inside. 9-12 concentric rings, basal rings always entire while others may be dentate. It matures in 2 years from October to December.

References: (1) (2) (3) (4)
Illustration: Pigment ink on 2.5"x3.5" Bristol Board