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Flora of New Zealand > Taxa > Magnoliopsida > Malpighiales > Hypericaceae > Hypericum > henryi
Author(s): P.B. Heenan (2010)

Hypericum henryi H.Lév. & Vaniot

Hypericum henryi subsp. henryi flower showing the characteristic short stamens. © Landcare Research 2010
Hypericum henryi subsp. henryi flower showing the characteristic short stamens. © Landcare Research 2010

Classification

Genus

Subordinate Taxa

Hypericum henryi subsp. henryi

Nomenclature

Scientific Name:
Hypericum henryi H.Lév. & Vaniot in Léveillé, Bull. Soc. Bot. France 54: 591 (1907)
Vernacular Name(s):
Hooker's hypericum

Description

Shrub, up to 3.5 m high. Stems upright to spreading, terete, without lines, black glands absent. Leaves 20.0–100.0 mm long, 7.0–30.0 mm wide, ovate, ovate-elliptic or ovate-oblong, glabrous, reticulate tertiary veins absent; pellucid glands present; black glands absent; apex subacute or obtuse, mucronulate; base broadly cuneate, obtuse or rounded; margin entire; petiole 0.5–3.0 mm long. Inflorescence terminal, in panicles, flowers 3–14, corolla 40–70 mm diam., saucer shaped. Pedicels 5.0–32.0 mm long. Bracteoles 7.0–10.5 mm long, 2.5–5.0 mm wide, lanceolate, broadly lanceolate, elliptic or elliptic-lanceolate, apex acute or subacute. Sepals 5, 5.5–10.0 mm long, 4.0–6.5 mm wide, unequal, moderately accrescent, suborbicular, ovate or broadly ovate; pellucid glands present; black glands absent; apex obtuse or rounded; margin finely and irregularly toothed in upper ½. Petals 26.0–32.0 mm long, 18.0–22.0 mm wide, longer than sepals, broadly obovate or suborbicular, golden, black glands absent, caducous after anthesis. Stamens in 5 bundles, 250–350, 7.0–12.0 mm long, ⅓–½ length petals; anthers 0.8–1.5 mm long, anther gland absent. Ovary 6.5–7.0 mm long, 4.0–5.0 mm wide, ovoid. Styles 5, 5.0–6.0 mm long, ¾ to similar length to ovary. Fruit a capsule, 11.0–20.0 mm long, 9.0–11.0 mm wide, ovoid to broadly ovoid, brown. Seeds 1.0–1.6 mm long, 0.4–0.5 mm wide, oblong, terete, dark brown, narrowly winged, longitudinally ridged, apices acute to obtuse.

Recognition

Distinguished by its taller habit, the stems terete and without lines, leaves with short but distinct petioles, the sepals being obtuse to rounded at the apex and with the margin being irregularly and finely toothed in the upper half, anthers without a conspicuous gland, 5 styles, the stamens less than half the length of the petals, and the seeds narrowly winged.
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Distribution

Hypericum henryi subsp. henryi distribution map based on databased records at AK, CHR and WELT. © Landcare Research 2010
Hypericum henryi subsp. henryi distribution map based on databased records at AK, CHR and WELT. © Landcare Research 2010
North Island: Auckland, Volcanic Plateau, Southern North Island.
South Island: Western Nelson, Westland, Canterbury.
Stewart Island.

Habitat

Occurs in disturbed habitats such as roadside banks and verges among grasses and in second growth on hillsides.
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Biostatus

Exotic: Fully Naturalised
Number of subspecific taxa in New Zealand within Hypericum henryi H.Lév. & Vaniot
CategoryNumber
Exotic: Fully Naturalised1
Total1
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First Record

Healy (1958, p. 538), as Hypericum hookerianum. Voucher: CHR 70196, 1947.

Phenology

Flowering: Jan.–Mar.
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Notes

H. henryi subsp. henryi has also been recorded erroneously in New Zealand as H. hookerianum.
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Images

  • Hypericum henryi subsp. henryi flowering stem. © Landcare Research 2010
    Hypericum henryi subsp. henryi flowering stem. © Landcare Research 2010
  • Hypericum henryi subsp. henryi flower buds showing sepals with subacute to obtuse apices.  © Landcare Research 2010
    Hypericum henryi subsp. henryi flower buds showing sepals with subacute to obtuse apices. © Landcare Research 2010
  • Hypericum henryi subsp. henryi sepals showing the characteristic obtuse apices. © Landcare Research 2010
    Hypericum henryi subsp. henryi sepals showing the characteristic obtuse apices. © Landcare Research 2010
  • Hypericum henryi subsp. henryi sepal showing the characteristic obtuse apex. © Landcare Research 2010
    Hypericum henryi subsp. henryi sepal showing the characteristic obtuse apex. © Landcare Research 2010
  • Hypericum henryi subsp. henryi anthers without an anther gland. © Landcare Research 2010
    Hypericum henryi subsp. henryi anthers without an anther gland. © Landcare Research 2010
  • Hypericum henryi subsp. henryi seeds with a narrow wing. © Landcare Research 2010
    Hypericum henryi subsp. henryi seeds with a narrow wing. © Landcare Research 2010
  • Hypericum henryi subsp. henryi leaves have a short but distinctive petiole. © Landcare Research 2010
    Hypericum henryi subsp. henryi leaves have a short but distinctive petiole. © Landcare Research 2010
  • Hypericum henryi subsp. henryi leaves. © Landcare Research 2010
    Hypericum henryi subsp. henryi leaves. © Landcare Research 2010
  • Hypericum henryi subsp. henryi terete stem that is without lines. © Landcare Research 2010
    Hypericum henryi subsp. henryi terete stem that is without lines. © Landcare Research 2010
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Bibliography

Classification Subordinate Taxa Description Recognition Distribution Habitat Biostatus First Record Phenology Notes Images Bibliography
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