Flora of the Hawaiian Islands
Dicotyledon Literature for Erythrina sandwicensis
Wagner et al., 1990, 1999.
   Fabaceae -- The Pea Family Bibliography
      Erythrina sandwicensis

Common name(s): wiliwili
General Information
DistributionIn the Hawaiian Islands, endemic to Ni`ihau, Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Kaho`olawe, Hawai`i.

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Trees up to 15 m tall, bark reddish, papery, shallowly fissured; trunk and branches sparsely armed with conical prickles.
Leaves deciduous (usually absent when flowering), pinnately trifoliolate, terminal blade deltate to rhombic-oblate, wider than long, 4-10 cm long, 6-15 cm wide, apex obtuse to rounded, base truncate or rounded, lateral leaflets ovate, 4-8 cm long, 4-9 cm wide, apex acute to rounded, base asymmetrical (cuneate on 1 side, rounded on the other), upper surface glabrous, lower surface densely stellate-tomentose, petiole of terminal leaflet 8-15 cm long, petiolules of lateral leaflets ca. 5 mm long, stipules subulate, ca. 5 mm long, deciduous, paired glandular stipels on petiole below terminal and lateral leaflets.
Inflorescence axis horizontal, 10-15 cm long, flowers on distal 1/2 only, pedicels 3-10 mm long; calyx fusiform in bud, 1.5-2 cm long, with 5 apical knobs, splitting open on dorsal side as corolla emerges, thus becoming spathaceous and thrust beneath corolla, thin and chartaceous, densely brownish felty stellate tomentose; corolla usually orange, sometimes yellow, white, or pale green (all colors present in some populations), standard broadly ovate to elliptic, clavate, reflexed and erect, 4-5 cm long (incl. claw) and equally wide, wings elliptic, somewhat hooded, 1.5-2 cm long, 0.8-1 cm wide, keel petals distinct, elliptic, hooded, slightly shorter than wings and about as wide; stamens monadelphous, 4-5 cm long, the adaxial stamen distinct in upper 2/3, the other 9 distinct in upper 1/4; ovary stipitate, 2-2.5 cm long, stellate pubescent; style filiform, 2-2.5 cm long; stigma capitate.
Pods pendent, subligneous, 1-3-seeded, slightly constricted between the seeds, endocarp papery.
Seeds red to yellowish orange, ca. 1.5 cm long, ca. 1 cm wide, hilum black, persistent on pods long after maturity.
2n = 42*