| Quercus wislizeni | |
| Author | A.DC 1864 Prodr. 16(2): 67 |
| Synonyms | wislizeni f.
extima Jeps. 1909 |
| Local names | Interior live oak; Sierra live oak; |
| Range | California; Mexico; 300 - 1900 m; introduced in Europe in 1874; |
| Growth habit | usually a shrub,
but may reach 20 m, with trunk to 1.5 cm in diameter; numerous branches;
broad open crown; |
| Leaves | 2.5-5 x 1.2-3
cm; evergreen; leathery; flat (i.e. not rolled under), elliptic or oval
lanceolate; apex more or less pointed; base obtuse, or sometimes cordate;
margin entire or with small, awn-shaped teeth (to 16); both sides hairless;
dark lustrous green above; yellowish green beneath; petiole 3-20 mm long,
hairless or weakly pubescent; |
| Flowers | male flowers
in March-April, on 3-6 cm long catkins; |
| Fruits | acorn 2-4 cm long, 0.8-1.4 cm wide; narrowly ovoid and gradually tapered at apex; hairless; sessile; both sides of cup slightly pubescent; cup enclosing 1/3 to 1/2 (sometimes 2/3) of nut, with flat, pointed scales free at their tip. |
|
Bark, twigs and |
bark blackish, deeply fissured, with scaly ridges; twigs brown, hairless or slightly pubescent, stiff, 1.5-3 mm in diameter; terminal bud reddish brown, ovoid, 3-9 mm long, hairless or with some hairs near apex; |
| Hardiness zone, habitat | hardy; occurs on arid slopes; all types of soils; slow-growing; |
| Miscellaneous | --
A. Camus : n° 298; -- Sub-genus Quercus, section Lobatae, Series Agrifoliae; -- Discovered by Adolf Wislizenus (1810-1889) = physician of St Louis, of German origin, botanist and friend of G. Engelmann; -- Related to Q.kelloggii and to Q.agrifolia (with which it forms hybrids) -- Resembles Q.parvula, but the latter has stalked acorns and dull upper surface of leaves; Q.parvula deserves a species rank; |
| Subspecies and varieties |
---
var. frutescens Engelm. 1878 Trans. Acad. Sci. St. Louis
3: 396 --- Q.parvula
Greene 1887 : see this word --- Q.x
morehus = kelloggii x wislizeni (= "Oracle
Oak") |
| Pictures |
|
