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Archontophoenix alexandrae

(F.Muell.) H.Wendl. & Drude (1875)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Monocots Order: Arecales Family: Arecaceae Genus: Archontophoenix

Alexander palm, Alexandra palm, king palm

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Description

Key Characters:

Growth Form: Unbranched tree.

Stems: Trunk to 30 m tall, to 30 cm diam.

Roots:

Leaves: Leaves simple (appearing compound due to secondary separating of the blade). Spirally arranged. Leaves 10–12, to 4.5 m long, becoming vertically orientated; leaf sheath mid to lime green. Pinnae 60–80 each side of rachis, to 75 cm long. Blades dark green adaxially, silver-grey abaxially; ramenta lacking.

Flowers: Inflorescence to 100 cm long, branched to 4 orders; axes white to creamy green; rachillae to 30 cm long, erect to semipendulous, moderately flexuose distally. Flowers widely spaced on rachilla; floral bracts raised with sharp margins; perianth white to cream. Staminate flower to 9.5 mm long; stamens 9–16; filaments curved; pistillode about equal to petals. Pistillate flower to 4 mm high.

Fruit: Fruit ovoid; 8–14 mm long; 6–11 mm wide; stigmatic remains apical; mesocarp fibres to 1 mm wide; flat; sparingly branched; remaining compact in the dried state. Seeds globose; 8 mm diam.; raphe fibres weakly adherent.

Ploidy:

Habitat:

Elevation Range:

Historical Distribution

Images

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Uses and Culture

USES

Natural History

Statewide Status

Naturalized

Island Status

O'ahu Naturalized
Maui Naturalized
Hawai'i Naturalized

Dispersal Agents

Water/Ocean
Birds

Pollinators

Bibliography

Name Published In: Linnaea 39: 212 (1875)

Other References

Wagner et al. 1990:1362 (H); Staples & Herbst 2005:618 (KEY, DESCR); Daehler & Baker 2006:4 (O, DESCR); Oppenheimer 2011:6 (EM)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Archontophoenix alexandrae East Maui, Hana District, N of Puu Hinai Preserved_Specimen Solitary palms to 15m tall; trunk gray, with leaf scars <30cm apart; fronds 10-15, pinnae up to 90 per side, in one plane; sheath green forming smooth crownshaft, inflorescence born at transition of trunk to crownshaft. Oppenheimer, H.L. 30910 Maui BISH 2009-03-14
2 Archontophoenix alexandrae Oahu Preserved_Specimen fruit ripe, red; red palm leaflets separate; pinnate leaves 7' long; 45' tree, slender, straight; petioles and rhachis white. Neal, M.C. 55 Oahu BISH
3 Archontophoenix alexandrae Hawaii Preserved_Specimen leaves pinnate, flay with inflorescence at base; male flower, 10+ stamens; fixed versatile Neal, M.C. 28 Hawaii BISH
4 Archontophoenix alexandrae Puna District. 1km W. on Pakaka Rd Preserved_Specimen Single stem palm to 7m; fruit red at maturity. Annable, C.R. 3740 Hawaii BISH 1998-01-13
5 Archontophoenix alexandrae Puna, 1 km W on Pakaka Road Preserved_Specimen palm to 7 m; mature fruit red Annable, C.R. 3740 Hawaii BISH 1998-01-13
6 Archontophoenix alexandrae East Maui, Hana District, N of Puu Hinai Preserved_Specimen Solitary palms to 15m tall; trunk gray, with leaf scars <30cm apart; fronds 10-15, pinnae up to 90 per side, in one plane; sheath green forming smooth crownshaft, inflorescence born at transition of trunk to crownshaft. Oppenheimer, H.L. 30910 Maui BISH 2009-03-14
7 Archontophoenix alexandrae Lyon Arboretum; volunteers in Aroid Valley Preserved_Specimen Height 40', 12 dbh; lvs up to 10-12 ft. in length, ca. 90 pairs of pinnae. Pinnae 27-30 long w/silvery bloom on underside. Sheath 45 length, completely enclosed. Fruits bright red on maturity. Nagata, K.M. 523 Oahu BISH 1968-12-19
8 Archontophoenix alexandrae East Maui, Hana District, N of Puu Hinai Preserved_Specimen Solitary palms to 15m tall; trunk gray, with leaf scars <30cm apart; fronds 10-15, pinnae up to 90 per side, in one plane; sheath green forming smooth crownshaft, inflorescence born at transition of trunk to crownshaft. Oppenheimer, H.L. 30910 Maui BISH 2009-03-14
9 Archontophoenix alexandrae East Maui, Hana District, N of Puu Hinai Preserved_Specimen Solitary palms to 15m tall; trunk gray, with leaf scars <30cm apart; fronds 10-15, pinnae up to 90 per side, in one plane; sheath green forming smooth crownshaft, inflorescence born at transition of trunk to crownshaft. Oppenheimer, H.L. 30910 Maui BISH 2009-03-14
10 Archontophoenix alexandrae Honolulu - Foster Gardens fruit on the ground Preserved_Specimen Neal, M.C. Oahu BISH 1949-09-08
11 Archontophoenix alexandrae Preserved_Specimen Neal, M.C. 57 Oahu BISH
12 Archontophoenix alexandrae Oahu Preserved_Specimen leaf sheaths 18+ wide, 3-4' long; leathery leaflets in 1 plane, 60-70 pairs; blades 6x2-2.5'; petiole 1' long, thick horizontal in lowest leaf Neal, M.C. 58 Oahu BISH
13 Archontophoenix alexandrae Foster Gardens Preserved_Specimen Fruit only, red. Neal, M.C. Oahu BISH 1949-12-31
14 Archontophoenix alexandrae Honolulu - Foster Gardens Preserved_Specimen Trunk 60 + ft. high, slender, slightly curved, Fruit 11-12 mm long, 1 mm wide, bright red. Neal, M.C. Oahu BISH 1952-06-27
15 Archontophoenix alexandrae Honolulu, King Street, Kamehameha School for Boys Preserved_Specimen Neal, M.C. Oahu BISH 1937-04-01
16 Archontophoenix alexandrae Honolulu, 4000 Round Top Dr., Moleka trailhead Melaleuca quinquenervia, Bischofia javanica; mesic-wet bottomland forest, disturbed, shady Preserved_Specimen tree to 30 m tall; fruit red Ray, G. 64 Oahu BISH 1998-01-07
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