Nelson Bay Native Plants
Photographic reference of Australian plants native to the Tomaree Peninsula

Identifying Lomandra species in the Tomaree heathlands

Lomandra is one of those genera that bushwalkers along the Tomaree Peninsula tend to overlook, even though it is almost always present underfoot. The plants form tussocks, strappy leaves and quiet yellow or cream flower spikes tucked into the understorey of coastal heath. For anyone trying to learn the local flora, sorting out the various Lomandra varieties is a worthwhile exercise, because the genus holds clues to soil type, drainage and fire history.

The headlands around Nelson Bay, Fingal Bay and One Mile rise from ancient sandstone, and the thin sandy soils support a heath dominated by banksias, hakeas, pea-flowered shrubs and the grass-like tufts of Lomandra. With a little practice, the eye learns to separate the larger, more robust forms from the slender wire-leaved species that colonise the rock shelves.

What follows is a practical guide to recognising the Lomandra species most likely to be met with in this corner of New South Wales. It draws on field characters that can be assessed without a hand lens, though a small magnifying glass is helpful when examining flower parts.

The Lomandra genus and its place in heath

Lomandra belongs to the family Asparagaceae, despite looking very little like an asparagus. The plants are perennial, with tough linear leaves arising from a basal sheath, and they reproduce by both seed and rhizome. Many are tufted, while others spread by underground stems to form colonies.

In coastal heath, Lomandra species act as a structural component of the ground layer. They bind sandy soil, contribute to the litter layer and offer shelter for small reptiles and ground-dwelling insects. After fire, several species recover rapidly from rhizomes, which is one reason they persist on headlands that have been burnt in recent decades.

The genus is wholly endemic to Australia and New Guinea, with around 40 species recognised across the country. New South Wales hosts a significant share of that diversity, and the heath communities of the Port Stephens region are particularly rich. For those sketching out the broader heath community, the Monotoca and Leucopogon the heath shrubs of winter article on this site provides a useful companion to the present guide.

Leaf characters for field identification

Leaves are usually the first feature a walker notices. The most obvious variation is in width and rigidity. Lomandra longifolia carries broad, glossy green blades up to a centimetre across, often with a faint blue-green sheen. In contrast, the wire-leaved species such as Lomandra filiformis have thread-like, wiry foliage that arches gracefully between rocks.

Leaf tips and margins also help. Some species end in a small point, while others taper to a fine, almost imperceptible tip. A few, including Lomandra leucocephala, produce flattened blades that can feel almost succulent near the base. Examining the leaf cross-section is a useful step: hold a blade between the fingers and roll it gently. A flat ribbon suggests one group, while a triangular or cylindrical feel indicates another.

Texture matters as well. Lomandra densiflora and Lomandra multiflora both have rough, sandpapery leaves, whereas the foliage of Lomandra cylindrica feels smooth and almost waxy. These tactile differences become second nature once a few specimens have been handled side by side.

Leaf features worth recording

Flowering spikes and reproductive features

Lomandra flowers are small and easily missed, but they are diagnostic when looked at carefully. The inflorescences take two broad forms: branched panicles and unbranched spikes. Branched, many-flowered panicles are typical of Lomandra longifolia and Lomandra multiflora, while compact or unbranched clusters occur in Lomandra confertifolia and several related species.

Colour ranges from pale cream to mustard yellow, and individual flowers are either male or female on separate plants. In some species the sexes look subtly different, with females often carrying slightly larger floral segments. Fruits are small capsules, usually three-lobed, that split to release a few seeds which often sit on the plant for months.

For practical identification in the field, the easiest flowering feature to record is whether the spike is branched and how densely the flowers are packed. A handheld camera with a macro setting is helpful, and a ruler or coin for scale can make later reference work on PlantNET straightforward.

Habitat preferences on sandstone country

Heath on the Tomaree Peninsula is not uniform. Some patches sit on exposed sandstone platforms where soil is little more than a thin layer of grit. Other areas lie in swales where moisture lingers after rain. Lomandra species partition these microhabitats fairly cleanly, and a single afternoon's walk up to the summit lookout will pass through several distinct communities.

Lomandra longifolia tolerates a wide range of conditions and is frequently found in damp sclerophyll forest as well as coastal heath. Lomandra filiformis prefers the driest, rockiest sites and is often seen scrambling across boulder outcrops near the summit tracks. Lomandra multiflora sits somewhere between, occupying well-drained sandy soils with a touch of organic matter.

Heath that has been long unburnt tends to carry older, more robust tussocks, while recently burnt patches favour species with strong rhizomatous spread. Local Landcare groups working along the Worimi Conservation Lands keep useful records of burn history, and their observations can help explain why some patches are dominated by one species and others by another. Readers curious about the mosses and lichens often found on the same rotting logs may enjoy exploring the moss and lichen community on a fallen branch as a companion read.

Microhabitats worth checking

Species likely encountered on Tomaree Peninsula

The species most frequently met along the Tomaree tracks are Lomandra longifolia, Lomandra multiflora, Lomandra filiformis and Lomandra confertifolia. Lomandra cylindrica appears in a few sheltered spots, and Lomandra densiflora turns up where the soil holds a touch more moisture.

Lomandra longifolia is the easiest to recognise. Its broad, arching leaves and large branched flower spikes make it unmistakable once it has been compared with the finer-leaved species. Lomandra multiflora is similar but smaller in every respect, with narrower leaves and more delicate inflorescences. Lomandra filiformis is the wiry outlier, easily identified by its thread-like leaves and modest stature.

Lomandra confertifolia is a compact plant that can form dense mats on rocky shelves. Its leaves are short and crowded, giving it a distinctive hummocky appearance. Those who spend an arvo carefully working through a single patch of heath will soon pick up the pattern, and combining observations with photographs that show whole-plant habit, leaf and substrate is a good way to confirm an identification back home against reference material.

Distinguishing Lomandra from similar tufted plants

Several other tufted, grass-like plants grow in the same heath, and confusion is common. Lomandra leaves are distinguished from true grasses and sedges by their solid internal structure and the way they tear lengthwise to reveal tough fibres, rather than separating cleanly at the nodes.

Plants of Lomandra also differ from the many lily-like species in the region. Patersonia, Dianella and the various native irises all have flat, folded or channelled leaves but produce very different flowers. Patersonia carries a single blue-purple flower that lasts only a morning, while Dianella produces berries on tall stems. Lomandra flowers, by contrast, are small, clustered and yellow or cream.

It is worth keeping an eye out for hybrid forms and for non-native look-alikes. Several introduced garden plants can turn up in disturbed bushland near tracks and car parks, and familiarity with the true local Lomandra species makes these imposters easier to spot. Photographing specimens in situ, noting the substrate and recording associated species is a respectful approach that contributes useful records to local naturalists without removing anything from the bush.