Volume I (1961) - Flora of New Zealand Indigenous Tracheophyta - Psilopsida, Lycopsida, Filicopsida, Gymnospermae, Dicotyledons
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Metrosideros Banks ex Gaertn.

METROSIDEROS Banks ex Gaertn., 1788

Fls in us. terminal cymes or racemes; receptacle adnate to ovary; sepals 5, imbricate; petals 5; stamens ∞, much > petals; filaments filiform, anthers versatile. Ovary 3-celled, style filiform, ovules ∞. Capsules coriac., loculicidally 3-valved, or dehiscence irregular; seeds linear. Aromatic shrubs, trees or woody lianes with simple, opp., gland-dotted, exstipulate lvs. Some 20 spp. of N.Z., Australia, Polynesia to Malaya―the N.Z. spp. endemic.

SYNOPSIS OF GROWTH-FORMS

  • A.
    • Trees or shrubs
    • 1.
    • 2.
      • Capsules exserted
      • (a)
        • Plant at first an epiphyte:
        • robusta
      • (b)
  • B.
    • Lianes (may be bushy or straggling in absence of support), clinging by roots
    • 1.
    • 2.
      • Capsules included
      • (a)
        • Fls red:
        • carminea,scandens
      • (b)
        • Fls white or pink:
        • albiflora,colensoi,diffusa

Key

1
Fls white, or flushed with pink
2
Fls crimson to scarlet, or yellow
5
2
Lvs 35-90 × 25-50 mm.; filaments ± 3 cm.; receptacle ± 8 mm. Long
Lvs not > 25 × 20 mm.; filaments ± 1 cm.; receptacle not > 5 mm. Long
3
3
Capsule distinctly exserted beyond receptacle-rim
Capsule not exceeding receptacle-rim
4
4
Lvs coriac., subacute, glab. or nearly so; branchlets glab. or nearly so
Lvs membr. acuminate, pubescent; branchlets pubescent
5
Plant a liane
6
Plant a shrub or tree
7
6
Lvs 35-75 mm. long, filaments scarlet, capsules 12-20 mm. long, urceolate
Lvs 20-35 mm. long, filaments carmine, capsules 8-9 mm. long, subglobose
7
Lvs clad in dense white tomentum below
8
Lvs glabrous
9
8
Lvs ± 2-5 cm. long; filaments 1-2 cm. long
Lvs ± 5-10 cm. long; filaments 3-4 cm. Long
9
Capsule distinctly exceeding receptacle
Capsule not exceeding receptacle
10
10
Lvs of lanceolate order, ± 1-2 cm. wide; capsules 8-9 mm. long; receptacle silky-hairy; us. a tall tree
Lvs of ovate order, ± 2-3 cm. wide; capsules 6-7 mm. long; receptacle glab.; us. a straggling shrub

The nomenclature of the N.Z. spp. has been revised by Oliver (T.N.Z.I. 59, 1928, 419-423) and is followed here, with reduced synonymy.

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