Flora of the Hawaiian Islands
Dicotyledon Literature for Annona muricata
Staples & Herbst, 2005; Lorence & Wagner, 2020.
   Annonaceae Bibliography
      Annona muricata
General Information
DistributionNative to tropical America, but exact place of origin unknown.In the Hawaiian Islands, naturalized on Moloka`i.

Small tree, 7.5‒9 m tall, new growth puberulent with reddish brown hairs.
Leaves distichous, petiolate; blade narrowly obovate, narrowly elliptic or obovate-elliptic, 6.5‒20 cm long, 2.5‒6.5 cm wide, base acute to rounded, apex acuminate, shiny and glabrous adaxially, strigillose along midrib and secondary veins abaxially, with barbate domatia in secondary vein axils, secondary veins 8‒12 pairs; petiole thick, 5‒8 mm long.
Inflorescences cauligerous or ramigerous, sometimes in fascicles on knobby outgrowths of trunk, or solitary and leaf-opposed. Flowers on stout pedicel, 15‒20 mm long, 2‒2.5 mm in diameter medially, obconical, rusty puberulent, bracteolate; sepals 3, valvate, broadly triangular, 3‒4 mm long, 5‒6 mm wide, thick, apex acute, puberulent externally, petals thick, fleshy, glabrous, greenish yellow to yellow, 3 outer petals ca. 30 mm long, 22 mm wide, ovate, base cordate, apex acuminate, 3 inner petals 20‒22 mm long, 10‒15 mm wide, elliptic, cucullate, base acute to attenuate, apex obtuse; stamens numerous, 4 mm long, 1 mm in diameter, clavate with thickened apex; ovary ca. 5 mm long, 8 mm wide, broadly conical, carpels densely velutinous.
Fruit to 30 cm long, 15 cm wide, ovoid to oblong, often somewhat curved, when fresh exocarp green, surface bearing regularly well-spaced, soft, conical, curved spines 2‒3 mm long, flesh white, juicy and with cottonlike fibers surrounding the seeds.
Seeds numerous, light to dark brown, 13‒17 mm long, 9‒10 mm wide, ellipsoid, compressed, with low marginal ridge; endosperm ruminate.
David Lorence