This species is very closely related to Oryza alta and Oryza latifolia[].

Common Name:

General Information

Oryza grandiglumis is a clump-forming, annual plant with short rhizomes. The erect culms can be up to 4 metres tall[].
Because they are a source of resistance to, or tolerance of, biotic and abiotic stresses, the most important use of the various species of wild rice is probably in breeding programmes to improve the species of cultivated rice (Oryza sativa, Oryza glaberrima). The seed of this species is also sometimes harvested from the wild for local use as a food.

Known Hazards

None known

Botanical References

Range

S. America - Brazil, Bolivia, Peru, Colombia, Venezuela, French Guayana

Habitat

Savannah or woodland; growing in water on the edges of rivers or in wet places with clay or alluvial soils; at elevations up to 230 metres[].

Properties

Edibility Rating
Other Uses Rating
Habit	Annual
Height	2.00 m
Pollinators	Wind
Cultivation Status	Wild

Cultivation Details

Succeeds in full sun and in moderate shade[]. Requires a wet soil or shallow water[].

Edible Uses

Seed[].

Medicinal

None known

Other Uses

Because they are a source of resistance to or tolerance of biotic and abiotic stresses, the most important use of the various species of wild rice is probably in breeding programmes to improve the species of cultivated rice[].

Propagation

Seed. The seed of wild rice less than 12 months old often exhibits strong dormancy, which implies (though this has not been established) that the seed retains its viability for a considerable period[].
Heat treatment is generally effective in breaking dormancy - alternating temperatures between 34°c for 16 hours then 11°c for 8 hours is usually effective, though the time taken varies between species[].
Surface sow the seed in light shade and do not allow to dry out. Seed should germinate within 7 days at 30°c[]. Prick out 2 - 3 seedlings into individual pots when large enough to handle and, after a few days, move to a sunny position. Grow on until large enough to plant out.

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