Search for featured oaks. Acorns and leaves not drawn in same scale.

Showing posts with label Cyclobalanopsis. Show all posts
Showing posts with label Cyclobalanopsis. Show all posts

Wednesday

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




Friday

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 





Thursday

Cyclobalanopsis daimingshanensis



Name:     
Cyclobalanopsis daimingshanensis S. Lee in Y. C. Hsu & H. W. Jen, Acta Bot. Yunnan. 1: 147. 1979.
 

Synonyms:    Quercus daimingshanensis (S. Lee) C. C. Huang.

Local Names:    大明山青冈 da ming shan qing gang (2)

Acorn:    oblong 2 cm long, 1.3 cm wide; glabrous; enclosed 1/3 by cup; cup hemispherical velutinous outside, scales in 5-6 concentric rings with margins apical ones denticulate, others entire; scar 3-5 mm, flat; stylopodium persistent; matures first year; (1)

Leaves:    4-7 x 1.5-3 cm; elliptic; glabrous, whitish below, dark green above; base cuneate, apex shortly acuminate, margin denticulate near apex; 7-9 vein pairs inconspicuous above and slightly raised beneath; petiole 5-8 mm, glabrous; (1)

Range:    China (central Guangx, in Daming Shan). Habitat: Mixed mesophytic forests in mountains; circa 1000 m. C Guangxi (Daming Shan) (2)

References:
(1) http://oaks.of.the.world.free.fr/quercus_daimingshanensis.htm;
(2) http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=210000362
(3) http://www.tropicos.org/Name/13101192
Illustration



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




Monday

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.





Tuesday

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


Monday

Quercus macrocalyx, Cyclobalanopsis fleuryi






Leaf and influrescens are not drawn on same scale.

Author: Hickel & A.Camus 1931: Quercus macrocalyx (Hickel & A.Camus) Synonyms: M. Deng & Z.K.Zhou 2005, fleuryi Hickel & A. Camus 1923, Cyclobalanopsis fleuryi (Hickel & Camus) Chun ex Q.F.Zheng 1982 , tsoi Chun ex Menitsky 1976 , Cyclobalanopsis austroyunnanensis Hu 1951 , Cyclobalanopsis nengpulaensis H.Li & Y.C.Hsu 1992 , megalocarpa A.Camus 1948 , xanthoclada Drake 1890 (A.Camus = n° 6) , Cyclobalanopsis xanthoclada (Drake) Schottky 1912

Height: Up to 25 m tall; not hardy. Range: prefers granitic soil and wet mountain subtropical forests; Laos, Vietnam, China (Fujian, Guangdong, Guangxi, Guizhou, Hainan, Jiangxi, Tibet, Yunnan)

Acorn: 3-4 cm long, 2-3 cm in diameter, 4-5 together on a 7 mm thick rachis (thicker than twig), 2/3 or almost all covered by thick cup; cupule campanulate to cylindric, thick, with brown pubescence inside and outside, with feltlike orangish brown indumentum with 9-13 yellowish white pubescent, subentire rings; basal scar convex ; stylopodium persistent ; maturing in 2 years; References: (1), (2), (3) Photographs of specimen: (4) (5)

Leaves: 13-24 x 4-8 cm; elliptic-ovate or oblong-elliptic; apex acute to shortly acuminate; base cuneate; glabrous on both sides (young leaves densely orange brownish tomentose); whitish beneath; margin entire or with small teeth near apex; midvein slightly raised above; 10-15 veins pairs prominent beneath;  tertiary veins conspicuous; petiole 1 cm long, tomentose at first, becoming glabrous;  References: (1)(2)(3) Photograph: (4)

Illustration: Pigment ink on 2.5"x3.5" Bristol board



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