Asimina triloba (L.) Dunal

Indian-banana (en), Aciminier (fr)

Species

Angiosperms > Magnoliales > Annonaceae > Asimina

Characteristics

Shrubs or trees , 1.5-11(-14) m; trunks slender, to 20(-30) cm diam.; bark shallowly furrowed in larger trees. Branches spreading-ascending, slender; new shoots moderately to copiously brown-hairy apically, aging glabrous. Leaves: petiole 5-10 mm. Leaf blade oblong-obovate to oblanceolate, 15-30 cm, membranous, base narrowly cuneate, margins scarcely or not revolute, apex acute to acuminate; surfaces abaxially densely hairy, later sparsely so on veins, adaxially sparsely appressed-pubescent on veins, becoming glabrous. Inflorescences from previous year's shoots before or during new leaf emergence; peduncle nodding, (1-)1.5-2(-2.5) cm, densely hairy, hairs dark brown to red-brown; bracteoles 1-2, basal, usually ovate-triangular, rarely over 2-3 mm, hairy. Flowers maroon, fetid, 2-4(-5) cm diam.; sepals triangular-deltate, 8-12 mm, abaxially densely pilose; outer petals excurved, oblong-elliptic, 1.5-2.5 cm, abaxially puberulent on veins; inner petals elliptic, 1/3-1/2 length of outer petals, base saccate, apex recurved, surfaces abaxially glabrate, veins impressed adaxially, corrugate nectary zone distinct; pistils 3-7(-12). Berries yellow-green, 5-15 cm. Seeds brown to chestnut brown, 1.5-2.5 cm.
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Usually shrubby, sometimes a tree to 10 m; young twigs hairy; lvs oblong-obovate, becoming 15–35 cm after anthesis, abruptly short-acuminate, gradually narrowed below; petiole 5–10 mm; fls from wood of the previous year, lurid purple, 3–4 cm wide, the sep 8–12 mm long, the outer pet 1.5–2.5 cm, broadly ovate, outcurved, the inner ovate, nearly erect, and nectariferous at the base; receptacle hemispheric or subglobose; peduncles hairy, (10–)15–20(–25) mm at anthesis; frs solitary or few, 6–15 × 3–4 cm, yellowish-brown, rounded at the tip; seeds flattened, 2–2.5 cm; 2n=18. Rich, damp woods; w. N.Y. and s. Ont. to s. Mich. and e. Nebr., s. to Fla. and Tex. Apr, May.
A medium sized tree. It grows to 8-15 m tall. It has straight spreading branches. It loses its leaves during the year. The leaves are narrow and oval. They are up to 25 cm long. They are widest above the middle. The upper surface is green and they are more pale underneath. The flowers are deep red-brown. They are 5 cm long and hang down. They are carried in clusters of 2-5 flowers. The fruit is black-brown. They are elongated. They are 5-15 cm long. The fruit are edible. They have soft orange flesh. The seeds are small, long, hard and black. There are several named cultivated varieties.
Life form perennial
Growth form shrub
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination
Spread -
Mature width (meter) 4.0
Mature height (meter) 4.5 - 7.6
Root system rhizome tap-root
Rooting depth (meter) 0.5
Root diameter (meter) 0.7
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway -

Environment

It is a temperate plant. It is native to North America. It prefers rich soil. It is best with some shade. It will tolerate reasonable frost. It needs a growing season of 6-8 months but then can tolerate temperatures. It suits hardiness zones 5-10. Arboretum Tasmania.
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An understorey tree of woodlands, growing in deep rich moist soils of river valleys and bottomlands, often forming dense thickets.
Light 3-7
Soil humidity 4-6
Soil texture 3-4
Soil acidity 2-7
Soil nutriment -
Hardiness (USDA) 6-8

Usage

The ripe fruit have the consistency of a custard and are eaten. They are also used for preserves, ice cream, cakes and sweet desserts. Caution: The seeds are toxic. Some people are allergic to this fruit.
Uses dye environmental use fiber fibre food insecticide material medicinal ornamental poison wood
Edible fruits seeds
Therapeutic use Vermifuge (unspecified), Pediculicide (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

They are grown from seed. They seed need cold treatment before they will grow. Plants do not transplant easily because of the deep taproot.
Mode cuttings seedlings
Germination duration (days) -
Germination temperacture (C°) 21
Germination luminosity -
Germination treatment soaking stratification
Minimum temperature (C°) -23
Optimum temperature (C°) 12 - 22
Size -
Vigor -
Productivity -