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Homalanthus polyandrus (hook.F. ex Müll.arg.) Cheeseman

Kermadec poplar (en)

Species

Angiosperms > Malpighiales > Euphorbiaceae > Homalanthus

Characteristics

Glabrous tree, 3-9 m high. Twigs rounded, slightly ribbed. Lvs broadly ovate, truncate to cordate at base, rarely perfoliate, acute at apex, (3)-5-15-(20) cm long, usually turning red in cooler part of year; seedling lvs broadly ovate, truncate or cordate at base, sometimes perfoliate; petioles > or ± = blade; stipules soon deciduous. Racemes up to 17 cm long, usually with few solitary long-pedicellate ♀ fls below or at base and many solitary short-pedicellate ♂ fls above (racemes occasionally unisexual); each fl. subtended by a bract and 2 prominent glands at the base of the pedicel. ♂ fls: stamens c. 30-35; perianth segments 1. ♀ fls: ovary 3-celled; styles 3. Fr. ± smooth, 3-angled, reddish, 10-12 mm diam.
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Slender glab. canopy tree up to c. 8 m. tall; branches brittle, lf-scars prominent. Lvs of young plants up to 3 dm. diam.; of adults on petioles up to 10 cm. long, stipules ± 2 cm. long, caducous; lamina ± 5-10 × 5-10 cm., very broad-ovate to subrhombic, abruptly narrowed to acute or acuminate apex, cuneate to truncate at base, membr., dark green above subglaucous below. Racemes slender, up to c. 20 cm. long. ♀ 5-1, at base, on pedicels up to 4 cm. long; bracts minute, glandular; styles 2, stigmas capitate. ♂ ∞, mostly in clusters of 3, on filiform pedicels up to c. 2 mm. long; stamens ∞, close-set. Capsule up to 10 mm. or more diam., ± globose; aril yellowish.
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Growth form tree
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Foliage retention deciduous
Sexuality monoecy
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Mature height (meter) 5.5 - 8.5
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Cultivation

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Distribution

Homalanthus polyandrus world distribution map, present in New Zealand

Conservation status

Homalanthus polyandrus threat status: Vulnerable

Identifiers

LSID urn:lsid:ipni.org:names:350036-1
WFO ID wfo-0000983010
COL ID 8WTDF
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Carumbium polyandrum Homalanthus polyandrus
WorldFloraDB 2024