About

Banksia ilicifolia, commonly known as holly-leaved banksia, is a tree in the family Proteaceae. Endemic to southwest Western Australia, it belongs to Banksia subg. Isostylis, a subgenus of three closely related Banksia species with inflorescences that are dome-shaped heads rather than characteristic Banksia flower spikes. It is generally a tree up to 10 metres (33 ft) tall with a columnar or irregular habit. Both the scientific and common names arise from the similarity of its foliage to that of the English holly Ilex aquifolium; the glossy green leaves generally have very prickly serrated margins, although some plants lack toothed leaves. The inflorescences are initially yellow but become red-tinged with maturity; this acts as a signal to alert birds that the flowers have opened and nectar is available.

Robert Brown described Banksia ilicifolia in 1810.

How to grow it

Rarely cultivated, Banksia ilicifolia requires a sunny position and sandy well-drained soil to do well. A slow-growing plant, it takes up to ten years to flower from seed. The glossy green foliage and long flowering period, combined with prominently displayed flowers give it horticultural potential, although its prickly foliage makes fallen leaves a problem if planted near lawns or walkways. Seeds do not require any treatment, and take 22 to 41 days to germinate. Difficulties in collection and low seed set make seed relatively expensive. Seeds are often eaten by insects before they can be collected.

Where it grows

A relatively common species, the holly-leaved banksia is widely distributed within southwest Western Australia. It occurs within 70 km (43 mi) of the coast, from Mount Lesueur to Augusta, and then east to the Cordinup River east of Albany. In the Margaret River region, it grows on yellow sand plains behind the Leeuwin-Naturaliste Ridge. Almost all occurrences are to the west (seaward) side of the Darling Scarp, although there are two outlying populations – one near Collie east of Bunbury and the other in the Tonbridge-Lake Muir area near Manjimup. Along the south coast, there is one inland population at Sheepwash Nature Reserve near Narrikup northwest of Albany. The annual rainfall over its distribution ranges from 600 to 1,100 mm (24 to 43 in).

Other Banksia plants

Banksia acanthopoda · Prickly Banksia · Banksia acuminata · Wallum Banksia · Banksia alliacea · Cactus Dryandra · Northern Banksia · Yilgarn Dryandra · Banksia archaeocarpa · Banksia arctotidis · Banksia armata var. armata · Banksia armata var. ignicida