Classification
 Subordinate Taxa
 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.

 Distribution

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.

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

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

 Phenology

Flowering: Jan.–Mar.

 Notes

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

 Bibliography
Healy, A.J. 1958: Contributions to a knowledge of the adventive flora of New Zealand, No.6. Transactions of the Royal Society of New Zealand 85(4): 531–549.
Heenan, P.B. 2014: Hypericaceae. In: Breitwieser, I.; Brownsey, P.J.; Heenan, P.B.; Wilton, A.D. (ed.) Flora of New Zealand — Seed Plants. Fascicle 1. Manaaki Whenua Press, Lincoln.
Léveillé, H. 1907: Les Hypericum de la Chine. Bulletin de la Société Botanique de France 54: 587–596.