Watsonia Meriana (L.) Mill

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496 Watsonia meriana (L.) Mill. FM: Iridaceae LF: Perennial herb SN: Antholyza meriana L., Watsonia bulbillifera J.W. Mathews & L. Bolus CU: Ornamental CN: Bugle lily, bulbil watsonia, wild watsonia Invaded Habitats Woodland, heathland, grassland, riparian habitats, seasonal wet lands, coastal dunes, disturbed sites. Description Erect herb, 1.2–1.8 m tall, with corms. Corms up to 8 cm in diam eter. Flower stems reddish, sometimes branched above. Bulbils (cormils) in clusters at nodes on the upper stem, 6–7 mm in diam eter. Leaves up to 70 cm long and 4–5 cm wide, glabrous, with prominent midvein. Most leaves arising from the corm, stem leaves much smaller. Flowers in a terminal spike, brick red to salmon pink, trumpetshaped, 6–8 cm long. Corolla tube curved. Fruits are capsules, ovoid, blackish, 3–4 cm long (Parsons and Cuthbertson, 2001; Flora of Australia, 2014). Ecology and Impacts Watsonia meriana. From Stan Shebs, published under a creative commons Bulbil watsonia does not set seeds in Australia and spreads vegeta license (http://creativecommons.org/licenses/by/3.0/) tively by corms and bulbils. These are dispersed by soil movement, machinery and water streams. Plants in North America occasion ally produce viable seeds (Flora of North America, 2014). A single plant pro duces hundreds of bulbils that easily detach (Blood, 2001). The plant grows in dense stands that reduce native plant species richness and prevent any regeneration of overstorey species. The plant grows in sun and par tial shade, and withstands flooding for several weeks. In Australia the plant in vades a number of natural habitats including dry and damp sclerophyll forests and seasonal freshwater wetlands. Dense infest ations are species poor and the weed persists once es tablished (Blood, 2001). in the soil. Cutting at 10–15 cm height when the stems first emerge Control but before they elongate prevents formation of new corms. An effect Single plants can be handpulled or grubbed any time before bulbils ive herbicide is 2,2DPA applied before the first flowers are formed form. Mowing or slashing kills top growth but does not affect corms (Moore and Fletcher, 1994; Parsons and Cuthbertson, 2001). 0002744574.INDD 496 1/31/2017 12:02:43 PM.

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Invasive Geophytes of South West Australia; Recent Studies on Biology, Ecology and Management
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