[Wikipedia] Africa native: Asparagus asparagoides, commonly known as bridal creeper, bridal-veil creeper, gnarboola, smilax or smilax asparagus, is a herbaceous climbing plant of the family Asparagaceae native to eastern and southern Africa. Sometimes grown as an ornamental plant, it has become a serious environmental weed in Australia and New Zealand. (link added by Mary Ann Machi)

[Cal-IPC] Invasiveness: Asparagus asparagoides (bridal creeper or African Asparagus fern) is a rhizomatous perennial herb (family Liliaceae) found in riparian woodlands of California central and south coast. Asparagus asparagoides colonizes both disturbed areas and undisturbed native habitats, but its current distribution is very limited. Plant shoots can form dense mats that limit light levels and then die back in the summer, creating a fire hazard. Plant colonies may also form a dense tuberous mat underground, preventing other plants from accessing soil moisture and nutrients. Cal-IPC Rating: Moderate Alert (link added by Mary Ann Machi)