Volume I (1961) - Flora of New Zealand Indigenous Tracheophyta - Psilopsida, Lycopsida, Filicopsida, Gymnospermae, Dicotyledons
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Hymenanthera R.Br.

HYMENANTHERA R. Br., 1818

Fls small, regular, perfect or unisexual, solitary or fascicled, axillary and/or on branchlets below lvs. Calyx deeply 5-lobed, or sepals united only at very base; petals 5; anthers 5, subsessile, connate, joined by membrane, which is produced above anthers into 5 triangular ± fimbriate teeth; nectariferous scale or sac dorsal. Styles 2-(3-4)-fid; fr. baccate, with (1)-2-(3-4) strophiolate seeds, endosperm plentiful. Slender to rigid shrubs; bark lenticellate; lvs alt. or fasciculate, with somewhat thickened margins and minute, fugaceous stipules. About 10 spp. of N.Z., Australia, Tasmania, Norfolk Id. The N.Z. spp. endemic, except perhaps the sp. referred to H. angustifolia R. Br.

Key

1
Lvs ± 2-5 cm. wide; margins distinctly toothed or sinuate
2
Lvs not or rarely > 2 cm. wide; margins entire or with few teeth
3
2
Lamina apex obtuse, margins sinuate to crenulate
Lamina apex acute,· margins distinctly serrate
3
Lvs of linear order
4
Lvs of obovate order
5
4
Branchlets slender, ± flexuous
Branchlets very stout, divaricate
5
Plant much depressed; branches very rigid, close-set; final branchlets always spinous
Plant erect or spreading, or if depressed then less rigid and branchlets hardly spinous
6
6
Petals lemon-yellow; laminae mostly < 2.5 cm. × 7 mm
Petals pale yellow; laminae mostly > 2.5 cm. × 7 mm
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