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Macadamia tetraphylla

L.A.S.Johnson (1954)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Proteopsida Order: Proteales Family: Proteaceae Genus: Macadamia

rough-shelled macadamia nut

Description

Key Characters:

Growth Form: Trees or shrubs, 3–18 m tall.

Stems:

Roots:

Leaves: Leaves simple. Leaves in whorls of (3-)4(-5). Blades oblong-oblanceolate. Apex acute to shortly acuminate. Base truncate to ± cordate. Surfaces leathery. Margins regularly spiny serrate. Subsessile or with petiole to 4 mm. Stipules absent.

Flowers: Inflorescences axillary, simple, 5.5-38 cm, densely brownish yellow tomentose; bracts of flower pairs subulate to linear, 0.2-1.4 mm. Pedicel 2-3 mm. Flowers perfect. Perianth yellowish or pink, 5.5-15 mm, tomentose. Stamens 4, opposite perianth segments. Ovary superior, 1-loculed, ovary and base of style brownish yellow pubescent; style terminal, simple.

Fruit: Fruit globose; 1.5-5 cm in diam.; apex apiculate. Seeds usually 1; seed coat bony; wrinkled or with shallow depressions.

Ploidy:

Habitat:

Elevation Range:

Historical Distribution

Uses and Culture

USES

  • Yes

Natural History

Statewide Status

Naturalized

Island Status

O'ahu Naturalized
Molokai Only found in cultivation
Lana'i Only found in cultivation
Maui Naturalized

Dispersal Agents


Pollinators

Bibliography

Name Published In: Proc. Linn. Soc. New South Wales 79: 15 (1954)

Other References

Wagner et al. 1990:1085 (cult. and known to persist but not nat.); Oppenheimer 2004:16 (NEWNAT/EM, DESCR); Staples & Herbst 2005:470 (DESCR); Faccenda 2024b:129 (O)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Macadamia tetraphylla Locality redacted. Contact Bishop Museum Botany Department for details Shady understory Preserved_Specimen Frequently recruiting in understory Faccenda, K. 1849 Oahu BISH 2021-05-22
2 Macadamia tetraphylla Locality redacted. Contact Bishop Museum Botany Department for details In alien forest dominated by Schinus, Psidium cattleianum, Fraxinus, Cinnamomum camphora, & Acacia mearnsii. Preserved_Specimen Naturalized trees, many plants in all size classes present, Oppenheimer, H.L. 110214 Maui BISH 2002-11-24
3 Macadamia tetraphylla Locality redacted. Contact Bishop Museum Botany Department for details alien mixed vegetation dominated by large Ficus tree Preserved_Specimen 8 m tree; whorled leaves; in shade Wysong, M.L. 826 Molokai BISH 2005-12-02
4 Macadamia tetraphylla Locality redacted. Contact Bishop Museum Botany Department for details Grown on lawn below main galleries. Preserved_Specimen Two trees ca. 18-20ft tall, with dense full crown; lvs usually 4 per node, margins sharply spiny; flws just finishing, apparently white; new frts green, tiny; mature frts ca 1 diam, green. Old nut shells on ground are rough. Staples, G.W. 850 Oahu BISH 1992-07-13
5 Macadamia tetraphylla Locality redacted. Contact Bishop Museum Botany Department for details Wet forest, full shade Preserved_Specimen 25 seedlings seen in area. Plants of various sizes seemingly from just one parent tree, seedlings up to 2.5 m tall. Along about 100 ft of the trail was surveyed for seedlings Faccenda, K. 2202 Oahu BISH 2022-01-19
6 Macadamia tetraphylla Locality redacted. Contact Bishop Museum Botany Department for details pili-sida, arid slope Preserved_Specimen Degener, O. 30113 Lanai BISH 1964-01-11
7 Macadamia tetraphylla Locality redacted. Contact Bishop Museum Botany Department for details Mesic forest, deep shade Preserved_Specimen Five seedlings seen along trail, area not surveyed off trail. Plantings of M. tetraphylla and M. integrifolia were also seen in the area. Seedlings reaching about 3 m tall, healthy Faccenda, K. 3111 Oahu BISH 2023-05-28
8 Macadamia tetraphylla Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Leaves usually in 4s, toothed, base very obtuse, subsessile or petioles to 0.5 cm. long; infl. very pubesceent, flowers pink; branchlets dark, new leaves reddish Hamilton, R.A. Oahu BISH 1964-02-12
9 Macadamia tetraphylla Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Leaves usually in 4s, toothed, base very obtuse, subsessile or petioles to 0.5 cm. long; infl. very pubesceent, flowers pink; branchlets dark, new leaves reddish Hamilton, R.A. Oahu BISH 1964-02-12
10 Macadamia tetraphylla Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Caum, E.L. Oahu BISH 1924-06-24
11 Macadamia tetraphylla Locality redacted. Contact Bishop Museum Botany Department for details Grown on lawn below main galleries. Preserved_Specimen Two trees ca. 18-20ft tall, with dense full crown; lvs usually 4 per node, margins sharply spiny; flws just finishing, apparently white; new frts green, tiny; mature frts ca 1 diam, green. Old nut shells on ground are rough. Staples, G.W. 850 Oahu BISH 1992-07-13
12 Macadamia tetraphylla Locality redacted. Contact Bishop Museum Botany Department for details In alien forest dominated by Schinus, Psidium cattleianum, Fraxinus, Cinnamomum camphora, & Acacia mearnsii. Preserved_Specimen Oppenheimer, H.L. 110214 Maui BISH 2002-11-24
13 Macadamia tetraphylla Locality redacted. Contact Bishop Museum Botany Department for details In alien forest dominated by Schinus, Psidium cattleianum, Fraxinus, Cinnamomum camphora, & Acacia mearnsii. Preserved_Specimen Naturalized trees, many plants in all size classes present, Oppenheimer, H.L. 110214 Maui BISH 2002-11-24
14 Macadamia tetraphylla Locality redacted. Contact Bishop Museum Botany Department for details yard Preserved_Specimen 30' tree, pruned Staples, G.W. 568 Oahu BISH 1990-03-08
15 Macadamia tetraphylla Locality redacted. Contact Bishop Museum Botany Department for details In alien forest dominated by Schinus, Psidium cattleianum, Fraxinus, Cinnamomum camphora, & Acacia mearnsii. Preserved_Specimen Oppenheimer, H.L. 110214 Maui BISH 2002-11-24
16 Macadamia tetraphylla Locality redacted. Contact Bishop Museum Botany Department for details Grown on lawn below main galleries. Preserved_Specimen Two trees ca. 18-20ft tall, with dense full crown; lvs usually 4 per node, margins sharply spiny; flws just finishing, apparently white; new frts green, tiny; mature frts ca 1 diam, green. Old nut shells on ground are rough. Staples, G.W. 850 Oahu BISH 1992-07-13
17 Macadamia tetraphylla Locality redacted. Contact Bishop Museum Botany Department for details Chruch grounds, between office building and stream Preserved_Specimen Nagata, K.M. 1288 Oahu BISH 1976-03-09
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