Engelmann oak
Quercus engelmannii
Summary 6
Quercus engelmannii, the Engelmann Oak or Pasadena Oak, is a species of oak in the white oak section Quercus sect. Quercus, native to Southern California and northwestern Baja California, Mexico.
Description 7
Trees , subevergreen, to 10 m. Bark gray or whitish, closely furrowed. Twigs light brown, 1-1.5 mm diam., densely or sparsely stellate-tomentose, soon glabrate. Buds reddish brown, subspheric to broadly ovoid, 1-2 mm, glabrous or basal scales pubescent; stipules persistent about terminal buds. Leaves: petiole (2-)3-4(-6) mm. Leaf blade oblong to elliptic, occasionally lanceolate or ovate, (20-)30-60(-80) × (5-)10-20(-25) mm, base cuneate to cordate, margins entire, undulate, sometimes irregularly toothed, especially toward apex, secondary veins 7-8(-10) on each side, branched, apex acute or broadly rounded; surfaces abaxially blue-green or pale green, densely and loosely glandular-tomentose, quickly glabrate or persistently floccose, especially about base of midrib, at maturity strongly glaucous, adaxially gray-green or pale green, bluish green or glaucous. Acorns solitary or paired, subsessile or on peduncle to 5-6 mm; cup cup-shaped or shallowly cup-shaped, 8-l0 mm deep × 10-15 mm wide, enclosing 1/3 nut, scales 1.5-3 mm wide, strongly and regularly tuberculate near base of cup, gray-pubescent; nut light brown, ovoid or oblong, 15-25 × 12-14 mm, glabrate or puberulent about apex. Cotyledons connate. 2 n = 24.
Fuentes y créditos
- (c) BJ Stacey, algunos derechos reservados (CC BY-NC), http://www.flickr.com/photos/finaticphotography/8977954367/
- (c) Shane Jordan, algunos derechos reservados (CC BY-NC), subido por Shane Jordan
- (c) Michael Schmidt, algunos derechos reservados (CC BY-NC-SA), https://www.flickr.com/photos/mschmidt62/6908985828/
- (c) 38°, algunos derechos reservados (CC BY-NC), https://www.flickr.com/photos/rhbekins/2352212428/
- (c) User:Geographer, algunos derechos reservados (CC BY), https://upload.wikimedia.org/wikipedia/commons/4/4b/Quercus_engelmannii%2C_Santa_Rosa_Plateau.jpg
- Adaptado por earthwatchtrees del trabajo de (c) Wikipedia, algunos derechos reservados (CC BY-SA), http://en.wikipedia.org/wiki/Quercus_engelmannii
- (c) Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA, algunos derechos reservados (CC BY-NC-SA), http://eol.org/data_objects/5008819
Más información
- NaturaLista página del taxón
- Biodiversity Heritage Library
- BOLD Systems BIN search
- Calflora
- CalPhotos
- eFloras.org
- Flora of North America (beta)
- Global Biodiversity Information Facility (GBIF)
- HOSTS - a Database of the World's Lepidopteran Hostplants
- IPNI (with links to POWO, WFO, and BHL)
- Jepson eFlora
- NatureServe Explorer 2.0
- SEINet Symbiota portals
- Tropicos
- USDA PLANTS database
- World Flora Online
