Grevillea 
Flora Frost Grevillea robusta
| Leaf tip | Aculeate |
| Leaf margin | Dentate |
| Flower scent | Unscented |
| Leaf type | Foliage leaf |
| Winter hardness | Not hardy (USDA-zone 9,10,11) |
| Inflorescence | Raceme |
| Structure (tissues) | Herbaceous |
| Leaf size | 25 - 30 cm |
| Leaf division | Pinnate |
| Plant, growth type | Erect |
The Grevillea robusta, commonly known as the Spider Flower, is a fascinating plant with unique characteristics. Its leaves are aculeate at the tip, meaning they have small spines or prickles, and have a dentate margin, which means they have toothed edges. The plant produces raceme inflorescence, where the flowers are arranged in a cluster along a stem.
One notable aspect of the Spider Flower is its unscented blooms. Unlike many other flowers that attract pollinators with their sweet fragrance, these flowers rely on other means to ensure pollination. This may include attracting specific insects through color or shape, or relying on wind or water for pollination.
The Spider Flower has foliage leaves, which are the type of leaves that are responsible for photosynthesis. They are relatively large, measuring between 25 to 30 cm in length. The leaves are pinnate, meaning they are divided into multiple leaflets arranged on either side of the central axis.
In terms of its growth habit, the Grevillea robusta is an erect plant. It grows upright, with a sturdy and tall stem. This makes it an excellent choice for landscaping, where it can provide structure and height to a garden or outdoor space.
It is important to note that the Spider Flower is not hardy in colder climates. It thrives best in USDA zones 9, 10, and 11, which are regions with mild to warm temperatures throughout the year. In colder zones, it may require additional protection or be grown as a potted plant that can be brought indoors during the winter months.
The structure of the Grevillea robusta is herbaceous, meaning it has soft and non-woody tissues. This makes it a relatively flexible plant that can adapt to its environment.
In conclusion, the Grevillea robusta, or Spider Flower, is a visually striking plant with aculeate leaves, dentate leaf margins, unscented inflorescence, and pinnate foliage leaves. It has an erect growth habit and is not hardy in colder climates. This unique plant brings beauty and structure to gardens and landscapes, making it a popular choice for many gardening enthusiasts.
Market availability index by month:
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| 4 | 1 | - | 1 | 1 | 1 | 3 | 2 | 4 | 2 | 1 | - |