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Products > Stenocarpus sinuatus
Stenocarpus sinuatus - Firewheel Tree
Image of Stenocarpus sinuatus
[2nd Image]
Habit and Cultural Information
Category: Tree
Family: Proteaceae (Proteas)
Origin: Australia (Australasia)
Evergreen: Yes
Flower Color: Red & Yellow
Bloomtime: Fall
Synonyms: [Agnostus sinuata, Cybele sinuata]
Height: 20-30 feet
Width: 8-12 feet
Exposure: Full Sun
Irrigation (H2O Info): Medium Water Needs
Winter Hardiness: 25-30 F
Stenocarpus sinuatus (Firewheel Tree) - This upright growing evergreen tree reaches to 100 feet tall in its native rainforest habitat but is usually seen as a tree 25-30 feet tall by 15 feet wide in cultivation in California. It has gray bark with brown young branches and is notable in or out of flower for its very attractive large (6 to 15 inch long) dark green leathery leaves that have wavy margins and are pinnately lobed on young trees. The 1 to 1 1/2 inch long flowers, primarily red or reddish orange with a yellow globular tip, are arranged with 6 to 20 flowers in an umbel that is reminiscent of a red wagon wheel - these 3 inch wide wheels are quite striking and can appear any time of the year but primarily fall and winter here in Southern California. The flowers are not on terminal branches but come from below a leaf petiole but because of their color, combined size and unique shape are still quite visible within the foliage. Plant in full sun to light shade and give it occasional deep watering. Despite its more tropical origins, this plant has proven adaptable to a range of climates, tolerating temperatures down to around 25 F and drier mediterranean climates with the addition of some supplemental irrigation. It also is tolerant of most soils so long and they are fairly well-drained but avoid applications of Phosphorus fertilizers and may benefit from supplemental micronutrient applications. It was noted by onetime Santa Barbara City Arborist Dave Gress that this plant disliked being planted in close proximity of street lamps, however it can be grown in a sunny or partly shaded location. There are many nice street trees of this species throughout Santa Barbara. This plant's natural distribution is within subtropical to tropical rainforests in Australia from New South Wales in the south to the Atherton Tableland in Queensland in the north. It also occurs in Papua New Guinea. The name Stenocarpus was first used in 1810 to describe Stenocarpus salignus by the Scottish botanist Robert Brown (1773-1858) and comes from the Greek word 'stenos' meaning "narrow" and 'karpos' meaning "fruit" in reference to the shape of the seed capsules (follicles) which are flattened and narrowed. The specific epithet is from the Latin word 'sinuatus' which means "wavy" in reference to the undulating margins of the leaves. This plant, first named Agnostus sinuata in 1832 by the Scottish botanist John Claudius Loudon (1783 - 1843) has also been known as Cybele sinuata before Austrian botanist Stephan Ladislaus Endlicher, who was the director of the Botanical Garden of Vienna, reclassified in 1848 to its current name. Other common names include Queensland Firewheel, Wheel of Fire, White Beefwood, Tulip Flower, White Oak, White Silky Oak and Rotary Tree. This latter name reportedly has led to the adoption of the plant as a mascot by Rotary Clubs around the world.  This information is based on research conducted about this plant in our nursery library and from reliable online sources. We also take into consideration observations of it in our nursery of crops, as well as of plants growing in the nursery's garden and those in other gardens we have visited. We will incorporate comments received from others and welcome getting feedback from anyone who may have additional information, particularly if it includes cultural information that would aid others in growing Stenocarpus sinuatus.