14 Jan Spanish bayonet
Yucca aloifolia, Yucca spp.
Commonly cultivated, this garden escapee is found on roadsides and sand dunes. Very difficult to control due to spiny nature of plant creating impenetrable thickets.
Origin: North & Central America and the West Indies
Habit: Evergreen, herbacious, slow growing perennial shrub or small tree, forming large spiny rosettes of leaves. Often freely branched.
Leaves: Depending on species. Green - bluish grey fleshy, linear to narrow-lanceolate, 0.3–1 m long, 2–5 cm wide, apex acute with terminal spine 10–20 mm long, margins finely toothed, surfaces glabrous.
Flowers: Creamy white, multi flowered panicle 1-3 m long.
Fruit: Oblong purplish capsule, 6–8 cm long, indehiscent (doesn’t open on its own accord at maturity); seeds black.
Roots: Large, dense and fleshy.
Dispersal: Seed and vegetative reproduction where stem segments and leaf rosettes take root. Spread by humans, contaminated soil (earthmoving equipment, car tyres etc) and garden refuse dumping.
Control: Hand or mechanical removal, cut and paint, drilling, foliar spray. All plant parts should be removed from site.