SafePlants

Acacia continua and Other Thorny Acacias

This page explores the fascinating world of Acacia continua, commonly known as Thorn Wattle, alongside other notable Acacia species, especially those characterized by their thorny nature.

Considerations for Pets

• Some Acacia species, including Acacia continua (Thorn Wattle) and Acacia paradoxa (Kangaroo Thorn), are noted for their thorns, which could pose a physical hazard to pets.
• The text mentions "swollen thorn" acacias which provide ant living quarters, suggesting a potential source of insect stings or bites if the ants are disturbed by curious pets.

Considerations for Children

• Many Acacia species, such as Acacia continua and Acacia paradoxa, are characterized by thorns, presenting a potential risk of injury, especially for young children.

Scientific and Common Names

• Scientific Name: Acacia continua Benth.
• Common Names: Thorn Wattle
• Other Acacia species mentioned:
  • Acacia cornigera L. (Bullhorn wattle, Bull's-horn acacia, Bull-horn thorn)
  • Acacia paradoxa (Kangaroo thorn, Prickly wattle, Hedge wattle, Paradox acacia)
  • Acacia adunca A. Cunn. ex G. Don (Wallangarra wattle)
  • Acacia alata R. Br. (Winged wattle)
  • Acacia aculeatissima (Snake wattle, Thin-leaf wattle)
  • Acacia baileyana (Cootamundra wattle, Golden mimosa)
  • Acacia cultriformis (Knife Acacia, Knife Leaf Wattle)
  • Acacia acinacea (Gold dust wattle)
  • Acacia euthycarpa (Wallowa wattle)
  • Acacia myrtifolia (Myrtle wattle)
  • Acacia carnei (Spiny or Thorn wattle)
  • Acacia mearnsii (Black Wattle)

Taxonomy and Nomenclature

• Family: Fabaceae (also mentioned as Mimosaceae - Mimosa family)
• Rank: Species

Distribution and Habitat

• Acacia continua is common from the Mount Lofty Ranges in Australia northwards.
• It thrives in warm, dry habitats.
• Acacia paradoxa (Kangaroo Thorn) has spread in California through ornamental and hedgerow plantings.

Morphological Characteristics

• Acacia continua is described as a stiff, much-branched, rounded shrub, typically reaching up to 1 meter in height and 70 cm in width.
• It possesses rigid, often hooked phyllodes (modified leaf stalks that function as leaves).
• Acacia paradoxa is characterized as a straggly to compact, intricate spiny shrub or small tree.
• The name "Kangaroo Thorn" refers to its thorny nature.

Ecological Role

• Acacia paradoxa is noted as having spread by ornamental and hedgerow plantings in California, indicating its potential to become invasive in suitable environments.

Quirky Facts

• The name "acacia" comes from the Greek word for "thorns," reflecting a common characteristic of many species within the genus.

Further Information

• Australian Plant Census
• Dave's Garden
• Discover Life
• USDA Plant Hardiness Map