| Quercus miyagii | |
| Author | Koidz. 1912 Bot. Mag. (Tokyo) 26: 167 |
| Synonyms |
Cyclobalanopsis miyagii
(Koidz.) Kudo & Masam; 1930 |
| Local names | Okinawa-urairo-gasi |
| Range |
Japan, Lutchu and Okinawa
Islands; |
| Growth habit | 12 m tall; |
| Leaves | 8-15 cm x 2-4;
lanceolate, seldom linear-oblong or oval-lanceolate; long acuminate at
apex; base rounded or obtuse, rarely cuneate; leathery; young leaves both
sides silvery-tomentose; hairless, green above; pale glaucous beneath
with rather persistent hairs; margin entire, seldom toothed; 10-12 pairs
of secondary veins, ascendent, curved, slightly raised beneath; petiole
hairless 1.5-2 cm long; |
| Flowers | |
| Fruits | acorn ovoid-globose
2.8 cm in diameter and 3 cm high; cup flattened covering only base of
nut, 2-3 cm in diameter, 8-10 mm high; 6-7 (-9) crenate rings; maturing
first year; |
|
Bark, twigs and |
glabrescent
shoots, densely covered with orbicular, whitish lenticels; |
| Hardiness zone, habitat | not hardy; |
| Miscellaneous | --
A. Camus : tome 1, p. 279, n° 45; -- Sub-genus Cerris, Section Cyclobalanopsis; -- Section Glauca, sub-section Glaucae (Menitsky); -- Related to Q.salicina ; |
| Subspecies and varieties |
---
variety of Lutchu Islands = Q.yayeyamensis Koidz. 1918 (sometimes
written yayamensis or yaeyamensis after the name of the
Yaeyama Islands, in the South-West of Okinawa Island) buds lanceolate 15 mm long; leaves 7-12 x 2.3-4 cm; lanceolate, pointed at apex, attenuate at base, hairless, margin entire, seldom dentate; 8-10 vein pairs; acorn ovoid, mucronate, 2-4 cm in diameter, enclosed 1/3 by woody cup; cup halfround with 7-9 concentric rings; differs from Q.miyagii in having leaves narrower, less acuminate and less glaucous beneath; |
| Pictures |  |