We value your privacy

We use cookies and other technologies to enhance your experience, analyse site usage, help with reporting, and assist in other ways to improve the website. You can choose to allow cookies and other technologies or decline. Your choice will not affect site functionality.

Volume I (1961) - Flora of New Zealand Indigenous Tracheophyta - Psilopsida, Lycopsida, Filicopsida, Gymnospermae, Dicotyledons
Copy a link to this page Cite this record

Plagianthus betulinus A.Cunn.

P. betulinus A. Cunn. in Ann. nat. Hist. 4, 1840, 25.

Ribbonwood.

Type locality: "on the banks of the Kana-Kana river, near its head." Type: K, No. 605, R. Cunningham, 1834.

Heteroblastic, subdioec. tree up to c. 15 m. tall; trunk up to c. 1 m. diam.; lvs deciduous. Juvenile plant a bush up to c. 2 m. tall, densely branched, with slender ± interlacing zigzag branchlets. Indumentum stellate. Lvs rather distant, on petioles ± 5 mm. long; lamina ± 5-15-(20) × 3-10-(15) mm., broad-ovate to ovate-lanceolate, crenate-serrate, sts deeply irregularly lobed. Plant changing gradually to semi-adult flowering stage; with larger lvs. Adult plant (often showing shoots reverting to juvenile state) with lvs on petioles up to 3 cm. long; lamina (10)-30-75 × 5-50 mm., membr.; ovate to ovate-lanceolate, or broad-ovate, acuminate, coarsely and irregularly crenate-serrate, cuneately or truncately narrowed to base. Subfloral lvs ± 3-10 × 1-5 mm., or lower ones larger. Fls ± 3-4 mm. diam., mostly unisexual, occ. perfect, ∞, in decompound paniculate cymes up to 25 cm. long; pedicels very slender, ± 5 mm. long. Calyx campanulate, ± 2 mm. long, with 5 narrow-triangular teeth; petals white, spathulate-oblong, clawed. ♂ with exserted staminal column; anthers red, ± 12, sts ∞, subsessile on column, style aborted, included in column. ♀ with ripe carpels c. 3-5 mm. long, ovoid, pointed. Seed solitary.

DIST.: N., S., St., Ch. Lowland forest from lat. 35° southwards, but rather local.

FL. 10-1. FT. 12-2.

Click to go back to the top of the page
Top