Fauna
Plant

Giant Reed

Arundo donax

Also known as Giant Cane, Spanish Cane, Wild Cane, Carrizo

Towering along riverbanks, ditches, and wetlands, giant reed forms dense, impenetrable thickets that can grow up to ten centimeters a day under ideal conditions. Its massive underground rhizome networks anchor deep in riparian soils, consuming vast quantities of water and outcompeting native willows and cottonwoods. Widely cultivated for thousands of years to produce woodwind reeds, weaving material, and erosion barriers, it has escaped to become one of the most aggressive invasive plants in warm temperate and subtropical waterways worldwide.

PerennialInvasiveWetland
Giant Reed reference1 / 7
(c) Elizabete Marchante, some rights reserved (CC BY), uploaded by Elizabete Marchante · cc-by
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Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Key facts
Diet & preyPhotoautotrophic (absorbs sunlight, water, and soil minerals)
Predators
  • Arundo gall wasp (Tetramesa romana)
  • Arundo scale (Rhizaspidiotus donacis)
  • Arundo leaf miner (Lasioptera donacis)
ThreatsHerbicide treatments, mechanical removal, and biological control agents
HabitatsRiparian zones, riverbanks, irrigation canals, floodplains, and damp roadsides
Life spanPerennial (clones can persist for decades or centuries)
Classification
  1. OrderPoales
  2. FamilyPoaceae
  3. GenusArundo
  4. SpeciesArundo donax
Range & activity
Range data is not available yet.
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Safe to observe at a normal distance; sharp leaf edges can cause minor paper-like cuts.
Responsible observation
  • Field Identification: Check the leaf base where blades clasp the thick, hollow stem like corn stalks.
  • Fire Safety: Steer clear of dense stands during dry conditions, as dead canes fuel intense wildfire.
  • Spread Prevention: Clean muddy boots and gear thoroughly to avoid transporting viable rhizome fragments.
Related species
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