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Preliminary report on a survey of Utricularia (Lentibulariaceae) in the Howard River – Shoal Bay area



Preliminary report on a survey of Utricularia (Lentibulariaceae) in the Howard River – Shoal Bay area


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Plant conservation; Revegetation

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Type: Adelaide River [probably Koolpinyah], N.T., N.Holtze 1176 (MEL: holo; K. NSW: iso.) Distribution: endemic to N.T.; known from Darwin rural area, Bathurst Island, base of western Arnhem Land escarpment, and east of Ramingining. Habitat: sandy swamps and seepage areas with Dapsilanthus and Melaleuca or at the edge of small streams, in water to a few cm deep or on damp sand. Apparently more tolerant of clayey substrates than many species. Flowering: Mar.- June. Abundance: relatively common in the Darwin Rural area. Proposed IUCN category: NT Utricularia cheiranthos P.Taylor Type: c. 33 km SW of Oenpelli, N.T., P.Taylor 17145 (K: holo.). Distribution: endemic to N.T. occurring at base of western Arnhem Land plateau and in adjacent parts of Kakadu NP. Habitat: wet grassland near streams. Flowering: Mar. - May. Abundance: rare. Proposed IUCN category: NT. Utricularia chrysantha R. B r. Type: Qld, Point Lookout, Banks & Solander (holo: BM). Distribution: southern New Guinea and Australia (WA, NT, Qld); widespread in the Top End. Habitat: in wet grassland and sedgeland, sometimes beside streams. Flowering: all months. Abundance: common. Proposed IUCN category: lc. Utricularia circumvoluta P.Taylor Type: E of McMinns Lagoon, c. 33 km SE of Darwin, N.T., P.Taylor 17123 (K: holo.). Distribution: N.T., QLD; in NT, near McMinns Lagoon, near Gunn Pt Rd, Yirrkala, Nitmiluk NP; two localities in Qld. Habitat: in swamps and on the margins of streams and lagoons, usually in shallow water among tall grasses and sedges; on sandy substrates (C.Michell, pers. comm.). Flowering: Mar.-June. Abundance: uncommon Proposed IUCN category: NT Utricularia D 127178 rubra Distribution: Darwin Rural area. Habitat: wet grassland. Flowering: May. Abundance: known from only one collection, but extremely inconspicuous. Proposed IUCN category: dd(a) Utricularia dunlopii P.Taylor Type: Little Nourlangie Rock, N.T., C.R.Dunlop 4737 (K: holo; DNA, NT: iso.). Distribution: endemic to northern W.A.and N.T.; in N.T. known from the western Arnhem Land plateau, Fitzmaurice River area and at Nitmiluk NP; and from two localities near Darwin. Also known from several collections from North Kimberley, W.A. Habitat: in damp depressions on sandstone pavement, on seepage areas, along sandy creeks or on damp sand, in seasonally swampy areas with Dapsilanthus.