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Bertya riparia Halford & R.J.F.Hend.
Family Euphorbiaceae
Bertya riparia Halford & R.J.F.Hend. APNI*

Description: Monoecious much-branched shrub 1–2 m high; branchlets terete, densely stellate-hairy; hairs sessile or shortly stalked.

Leaves petiolate, petioles 1.5–3 mm long, stellate-hairy; lamina narrowly obovate or linear, 21–29 mm long, 2.4–4 mm wide; upper surface green, sparsely to moderately densely stellate-hairy, smooth or with scattered tubercules; lower surface white, densely stellate-hairy; apex rounded to obtuse; base cuneate; margins recurved, with a small gland either side of midrib near base of lamina.

Flowers axillary, solitary or two together; peduncles 1.5–2.5 mm long; bracts 5–8, persistent, 2.9–4 mm long, acute to acuminate at tip, stellate-hairy. Male flowers sessile; calyx lobes 5, elliptic, 3–4 mm long, 2–2.5 mm wide; androecium c. 2 mm long; stamens c. 30. Female flowers sessile; calyx 5-lobed, lobes ± equal, erect, narrowly ovate to ovate, 3.2–4.2 mm long; petals absent. Ovary c. 2 mm long, densely stellate-hairy; styles shortly united; limbs 3, spreading, deeply 3- or 4-lobed.

Capsule 8.5–10 mm long, glabrous.


Illustration
C. Wardrop

Herbarium
Sheet

Type
Specimen

Flowering: Flowers have been recorded in February, September and October.

Distribution and occurrence: Confined to the ST of NSW, from near Tumut eastward to Brindabella.

Riparian, in open forest or woodland communities on sandy, sandy clay or dark brown loam soils.
NSW subdivisions: ST
AVH map***

The species name, from the Latin "riparius" meaning frequenting banks of streams or rivers, refers to the habitat in which this species grows.

Text by D. M. Crayn, edited by C. Herscovitch 25 Jul 2007.
Taxon concept: D. A. Halford and R. J. F. Henderson (2002)


APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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