| General Description | Branches curve upwards giving A. saccharum 'Monumentale' a narrow growth form while other characteristics are very similar to the straight species. |
| ID Characteristic | Branches curve upwards giving it an elliptical shape while maintaining a central leader into the crown; it is unlike A. saccharum 'Newton Sentry' which rarely maintains a central leader past 1.8 m. Bark begins smooth but becomes profoundly furrowed as it ages. |
| Shape | Elliptical crown that is very narrow in shape. |
| Propagation | Graft onto A. saccharum rootstock. |
| Pests | Verticillium wilt can be a problem while the fungal disease Rhystima, can cause premature defoliation. |
| Notable Specimens | Whistling Gardens, Wilsonville, Ontario, Canada.
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| Bark/Stem Description | Grey-brown bark. New growth is glabrous, but with age becomes profoundly furrowed having very deep ridges. The bark can vary but new growth tends to always be smooth. |
| Flower/Leaf Bud Description | Football shaped with the terminal bud being twice the size of the axillary buds, glabrous but tomentose at the tip. |
| Leaf Description | Opposite, simple leaves with 3-5 lobes, cordate, acuminate with medium deep lobes and are dark green. Turn yellow-orange in autumn. The leaves are slightly alkaline reducing pH levels when they decompose. |
| Flower Description | Mid-April to May. Perfect, having 5 sepals, greenish yellow colour. Flowers 3-4 weeks before tree develops leaves. |
| Fruit Description | Samara, glabrous, 2-5 cm long, 'u' shaped, seed casing appears plump and more pronounced than other maple samara and ripen through September to October. |
| Colour Description | Dark green leaves that turn yellow-orange in autumn. Bark is a grey-brown but new growth tends to be a light grey. |
| Texture Description | A medium textured plant. |
