Woody > Pinus > Pinus nigra > Pinus nigra 'Arnold Sentinel'
Pinus nigra
'Arnold Sentinel'
Arnold Sentinel Austrian Pine
Origin: The Arnold Arboretum, Jamaica Plains, Massachusetts, United States of America.
| Family |
| Pinaceae |
| Genus |
| Pinus |
| Species |
| nigra |
| Cultivar |
| 'Arnold Sentinel' |
| Category |
| Woody |
| Type |
| Tree (evergreen) |
| Pronunciation |
| USDA Hardiness Zone |
| 3-6 |
| Canadian Hardiness Zone |
| 4-7 |
| RHS Hardiness Zone |
| H7 |
| Temperature (°C) |
| -30 |
| Temperature (°F) |
| -40 |
| Height |
| 5 m |
| Spread |
| 1.5 m |
Photographs
Description and Growing Information
Flowering Period
| General Description |
| Needles closely resemble those of the Red Pine, the difference is in the flexibility of the needle. If its needles fold over themselves, they will not break. |
| Shape |
| Columnar. |
| Growth |
| Fast |
| ID Characteristic |
| A tall columnar tree with dark bluish-green needles. Needles are often curved and slightly twisted. |
| Pests |
| Susceptible to pine bark beetle, diplodia blight and pine wilt. |
| Habitat |
| Horticulture origin. |
| Bark/Stem Description |
| Stem is straight; bark on entire trunk is thick, scaly-plated, grey-brown-pinkish on some very old trees. |
| Flower/Leaf Bud Description |
| Reddish brown, 1.2-2 cm long, cylindrical, slightly pointed, and with white resin coating. |
| Leaf Description |
| Needles in fascicles of two, 8-15 cm long, stout, 1.5-2 mm thick, dark green, often curved and slightly twisted. Margins finely serrulate, (persistent for 4-7 years.) Leaf sheath blackish-grey, 10-15 mm. |
| Flower Description |
| Produces clusters of pink bell-shaped flowers. |
| Fruit Description |
| During the first year the cone is egg shaped, 1.2 cm long, expanding in the second year to more of an oval cone shape and ripening to a yellow-brown or brown. Cones open up over winter and will fall in the third spring. |
| Colour Description |
| Grey-brown bark, blueish-green foilage. |
| Texture Description |
| Medium-course. |
| Notable Specimens |
| The Gardens of Fanshawe College, London, Ontario, Canada. |
| Propagation |
| Splice side veneer grafting is most appropriate for pines. Remove a wedge from rootstock, fit branch into place, and wrap with a grafting strip and seal with grafting wax or paint. Grafted onto the species P. nigra. |
top