Backhousia gundarara M.D.Barrett, Craven & R.L.Barrett

Harrington, M.G. et al (2012) Australian Systematic Botany 25: 409-412. Type: Western Australia: Northern Botanical Province: Caroline Range, M.D. Barrett & R.L. Barrett MDB 2885, 27 March 2010.

Single- to multi-stemmed shrub or small tree to 7 m high and trunk to 20 cm diameter. Bark deciduous to base, smooth and peeling. Branchlets flattened to slightly 4-ribbed when young, rounded when older.

Leaves simple, opposite, ovate to elliptic or sometimes broadly ovate, 17-35 x 11-24 mm, slightly to distinctly discolorous, both surfaces hairy, prominent oil glands on both surfaces, pinnately veined with (5-)10-12 lateral veins each side of midvein; midvein flat or slightly sunken above; ; intramarginal vein visible; apex obtuse to broadly acute, not or very weakly and abruptly acuminate; base broadly cuneate to rounded; margin flat or slightly recurved, entire to crenate. Stipules falling early, subulate, 0.3-0.4mm long.

Inflorescence terminal or axillary arranged in branched cymes, 6-25 or more flowers in total. Flowers white; sepals 4, unequal, hairy on both surfaces; petals 4, white, ovate, longer than sepals, hairy on both surfaces, falling early; stamens numerous (57-59), free, white, filaments much longer than petals and sepals, versatile, opening by lateral slits; style filiform, straight, 5.5 mm long, gradually tapering to apex, hairy; ovary 2-locular; nectaries absent.

Fruit dry, indehiscent, enclosed in the hypanthium, 6 - 7 x 4.5 - 5.0 including persistent calyx lobes, 4-5 x 2-3 excluding calyx lobes, calyx lobes +/- ascending, style persistent.

Features not available.

Endemic to WA, currently known only from the upper reaches of the Prince Regent River. Grows in rainforest on sandy soils derived from basalt and sandstone.

Backhousia sp. Prince Regent (W.O'Sullivan & D.Dureau WODD 42) [HISPID Phrase Name]