RARE AND VULNERABLE

Boronia hippopala

Rutaceae

Velvet Boronia


(Tasmanian Endemic)
Boronia hippopala
An erect, woody shrub to 2.5 m tall covered with stiff, bristle-like hairs, apart from the flowers, giving the plants a greyish-green appearance. The branchlets are slightly glandular with small, blunt projections.
The leaves are composed of 3–7 distinct parts and are entire in outline. They are between 6–10 mm long, 6–14mm wide, and also slightly glandular with small, blunt projections. The terminal leaflets are between 1–9 mm long and 1–1.75 mm wide and linear or narrowly broader above the middle. They are also flat with differently coloured top and bottom surfaces. The side leaflets are similar but usually slightly longer, between 2.5–11mm.
The inflorescence is situated in the axils (where the stem meets the leaves), 1–3-flowered and shorter than or as long as leaves. The leaf-like structures surrounding the flower (sepals) are small, narrowly triangular and approximately 1.5–2 mm long. The petals are white to pink, narrowly ovate, pointed and between 3.5–8 mm long. Flowering may occur from September to December.
The fruit is approximately 2.5 mm long and 1.5 mm wide with stiff, bristle-like hairs


Habitat: It is known from a number of marshes in the Eastern Tiers at altitudes of 470–580 m, including the upper catchment of the St Pauls River and Flagstaff Marsh near Tooms Lake, with an outlying
(morphologically atypical) population along the Elizabeth River.
Boronia hippopala grows in wet heaths dominated by species such as Callistemon viridiflorus, Melaleuca spp., Leptospermum spp. and Gahnia grandis, as well as in adjacent Eucalyptus pauciflora–dalrympleana woodland. The underlying substrate is Jurassic dolerite, while drainage is moderate to poor.


(For full details, see the Threatened Species Section, Department of Primary Industries and Water)

Boronia hippopala
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