General data | Classifications | List of species | Local names | Back to home page |
Quercus elmeri | |
Author | Merrill 1929 Univ. Calif. Publ. Bot. 15: 43 |
Synonyms | |
Local names | |
Range | North
Borneo; Sumatra; Malaysia; to 1500 m; |
Growth habit | reaches
35 m tall and more; |
Leaves | 6-14
x 2-5 cm; leathery; oblong, elliptic or lanceolate; apex acuminate; base
cuneate, usually asymmetrical; margin plane, remotely denticulate at apical
1/2; brownish green, glabrous, shiny above; abaxially with greyish brown
stellate tomentum, late-glabrescent; 7-12 pairs of secondary veins raised
below, forming an angle of 60-70° with the midrib; petiole 1-3 cm
long, often flat above, glabrescent; |
Flowers | male
catkins 1.5-3 mm long, pubescent; male flowers pubescent, with 3-4 lobes
and 4-5 stamens; pistillate inflorescences 1-2 cm, densely hairy, with
3-4 flowers; female flowers with 3-4 recurved styles; |
Fruits | acorn
2.5-3 cm, glabrous, shiny brown, conical or cylindrical, with apex depressed
and base truncate; enclosed 1/4 by cup; silky cup with thick wall, 4-7
denticulate rings; |
Bark, twigs and |
greyish
brown, thick bark; twigs reddish pubescent at first, glabrescent, with
numerous lenticels; terminal bud ovoid or subglobose, tomentose, 3-5 mm
across; stipules linear, acute, pubescent, 5-7 mm long; |
Hardiness zone, habitat | not hardy; wet tropical forests, on basic soils; |
Miscellaneous |
-- A. Camus : tome 1, p. 194, n° 8; -- Sub-genus Cerris, Section Cyclobalanopsis; -- Section Semiserrata, sub-section Semiserratae (Menitsky). -- Named after A.D.E. Elmer, 1870–1942, plant collector in Borneo and the Philippines |
Subspecies and varieties |
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