Tree Browser
With these characteristics: None
Hophornbeam, Knowlton
Ostrya knowltonii
Betulaceae - Birch
Description
Leaves: Alternate; simple; oblong-ovate; 1" to 2" long; deciduous; 5-8 pairs of veins; sharply, doubly serrate margin; acuminate apex; thin; tough; dark green above; paler and somewhat hairy beneath; yellow fall color; petiole short, hairy.
Twigs/buds: Twigs slender; red-brown to dark brown. No terminal bud; lateral buds pointed, scales with green bases and brown tips.
Flowers/fruit: Monoecious. Fruit a small nutlet; enclosed in an oval, flattened, papery sac; sacs arranged in cone-like clusters, with the appearance of hops.
Bark: Thin; gray-brown; with small, shreddy plates.
Wood: Extremely hard, so often called "ironwood"; resembles hickory; diffuse-porous; little used.
General: Native to southeastern Utah, northern Arizona, southeastern New Mexico, and west Texas. Slow growing, small tree. Uncommon and found in canyons. Shade tolerant.
Landscape Use: Essentially unknown in cultivated landscapes. No cultivars available and may be difficult to find in any nursery, but could be grown from seed or dug from public land with a permit. Might be a possibility for "native" landscapes. Zones 6(5?)-9.
Characteristics
General
- Family:
- Betulaceae - Birch
- Cultivar Availability:
- No
- Hardiness Zone:
- 6-9
- Type:
- Broadleaf
- Utah Native:
- Yes
Growth
- Growth Rate:
- Low
- Mature Height:
- Medium
- Longevity:
- High
- Is Good Under Power Lines:
- No
- Crown Shape:
- Irregular
Ornamental
- Bark:
- No
- Fall Color:
- No
- Flowers:
- Yes
- Foliage:
- Yes
- Fruit:
- Yes
Tolerance
- Shade:
- High
- Salt:
- Medium
- Drought:
- High
- Poor Drainage:
- Low
- Alkalinity:
- High
- Transplanting:
- Medium