| Quercus longinux | |
| Author | Hayata 1911 J. Coll. Sci. Imp. Univ. Tokyo 30(1): 292 |
| Synonyms | Cyclobalanopsis longinux (Hayata)
Schottky 1912 Cyclobalanopsis longinux var. kuoi Liao Cyclobalanopsis longinux var. pseudomyrsinifolia (Hayata) Liao 1971 glauca var. longinux (Hayata) Menitsky 1977 kanehirai Nakai longinux var. kuoi (Liao) C.F Shen 1984 longinux var. kanehirai (Nakai) Liao 1970 pseudomyrsinifolia Hayata 1911 taichuensis Hayata 1911 |
| Local names | chang
guo qing gang ; |
| Range | Taiwan, 300 to 2500 m; |
| Growth habit | tree to 15 m tall, trunk to 0.6 m in diameter; |
| Leaves | 6-8
x 2-2.5 cm; leathery; narrowly oblong to lanceolate; apex caudate to long
acuminate; base cuneate; margin serrate in apical half; shiny green adaxially;
glaucous chalky beneath, with simple hairs ; 7-9 vein pairs, prominent
below; petiole hairless 1-2 cm; |
| Flowers | March to May; male flowers with lobes of perianth hairy only on margin; female flowers with enlarged stigmas; |
| Fruits | acorn
ovoid to ovoid-ellipsoid, 1.2 cm long, 0.9 cm wide; cup thin, enclosing
1/3 of nut, 8-9 mm long, 10-12 mm wide, greyish brown tomentose outside,
with 6-8 concentric rings denticulate at rim; scar convex; stylopodium
persistent, short; maturing in 1 year from September to November; |
|
Bark, twigs and |
twigs
slender, blackish brown, glabrous, with oblong lenticels; |
| Hardiness zone, habitat | not hardy; thrives in evergreen broadleaves forests; |
| Miscellaneous | --
Sub-genus Cerris, Section Cyclobalanopsis; -- Related to Q.myrsinifolia, but acorn thinner and leaves narrower; |
| Subspecies and varieties |
var. lativiolaciifolia
Liao (in Flora of Taiwan). |
| Pictures |
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