Quercus glaucoides (Lacey Oak, Texas Blue Oak, Canyon Oak, Smoky Oak, Rock Oak)
Botanical Information
| Family | Fagaceae |
| Genus | Quercus |
| Species | glaucoides |
| Synonyms | Quercus laceyi |
| Category | Woody |
| Type | Tree (deciduous), Shrub (deciduous) |
| Origin | Native to southern and southwestern parts of the Edwards Plateau in Texas and in the Mexican states of Coahuila, Durango, Nuevo Leon, and Tamaulipas. |
Details
| USDA Hardiness Zone | 7a - 7b |
| USDA Hardiness Ref. | |
| Canadian Hardiness Zone | Requires cold season protection under glass. |
| Canada Hardiness Ref. | |
| RHS Hardiness Zone | H6 - H5 |
| RHS Hardiness Ref. | |
| Temperature (°C) | (-17.7) - (-14.9) |
| Temperature (°F) | 0 - 5 |
| Height | Up to 18 metres |
| Flowering Period | March, April, May |
Description and Growing Information
| ID Characteristic | A medium-sized tree on good sites or a shrub on poor sites. |
| Shape | Slightly pyramidal when young, round when mature. |
| Landscape | Provides food and cover for deer, small mammals, and birds. |
| Propagation | Propagated from seed. |
| Cultivation | Grow in rich, medium moisture, well-drained soils in full part shade. |
| Notable Specimens | Harry P. Leu Gardens, Orlando, Florida, United States of America. |
| Habitat | Often found associated with limestone outcrops, woodland, and riparian zones with mixed stands of ash, basswood and other oaks, a component of the pine-juniper-madrone-oak forest type of northern Mexico |
| Bark/Stem Description | Multiple trunks or single trunk with erect, spreading branches that are light grey in colour with shallow furrows and scaly ridges. Young twigs are grey and pubescent, mature limbs become smooth and reddish-brown. |
| Flower/Leaf Bud Description | Smooth, brown ovoid buds. |
| Leaf Description | Deciduous, thick and oblong with a few shallow lobes. foliage is coloured in spring and autumn; dark-blue or grayish-green in summer. |
| Flower Description | Yellow |
| Fruit Description | 1 - 3 acorns on a short peduncle up to 10 mm in length, saucer- shaped cup with pubescent scales, covers up to 1/3 of the nut; oblong or barrel-shaped, usually blunt at both ends, up to 19 mm long. |
| Colour Description | Summer foliage takes on a smokey appearance. |
Photographs
Quercus glaucoides, form, Harry P. Leu Gardens, Orlando, Florida, United States of America.
Quercus glaucoides, leaf, Harry P. Leu Gardens, Orlando, Florida, United States of America.
Quercus glaucoides, bark, Harry P. Leu Gardens, Orlando, Florida, United States of America.