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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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Flowering: Feb. Nov. Abundance: common, often abundant. Proposed IUCN category: lc. Utricularia quinquedentata F.Muell. ex P.Taylor Type: near Adelaide River [probably Koolpinyah], N.T., M. & N.Holtze 1177 (MEL: holo; BM: iso.) Distribution: W.A., N.T. QLD; known from Darwin rural area, Kakadu, Arnhem Land, Katherine Gorge. Widespread in E Qld with three collections from W.A. Habitat: sandy swamps and seepage areas, usually with Dapsilanthus, on moist sand. Flowering: Apr.- June. Abundance: uncommon. Proposed IUCN category: nt. Utricularia rhododactylos P.Taylor Type: Mt Gilruth, Deaf Adder Gorge, N.T., C.R.Dunlop 4414 (K: holo; DNA: iso.). Distribution: N.T. endemic; western Arnhem Land plateau and adjacent parts of Kakadu NP. Habitat: in shallow sandy depressions (in water) on sandstone pavement. Flowering: Feb. - Mar. Abundance: locally common in western Arnhem Land. Proposed IUCN category: NT. Utricularia singeriana F. Muell. Type: Port Darwin, N.T., M.Holtze 1026 (MEL: holo; K, NSW: iso.) Distribution: endemic to northern N.T. and W.A.; in NT, one locality near Edith Falls; also near Kununurra in W.A. Habitat: wet sandy flats and swamps with short grasses and sedges (C.Michell, pers. comm.). Flowering: Mar. - May. Abundance: Rare in W.A. and N.T. Historically found 4 miles NE of Darwin [near Rapid Creek], but this locality is probably now under Darwin Airport or suburban Darwin. Proposed IUCN category: e(d). Utricularia stellaris L. f. Type: East India, Koenig s.n. (holo: BM; iso: LD). Distribution: Africa, tropical Asia from India to Vietnam, northern Australian (W.A., N.T., Qld); ?? Habitat: free-floating aquatic; in billabongs and lagoons. Flowering: June. Abundance: rarely collected in N.T. Proposed IUCN category: dd(a). Utricularia subulata L. Type: U.S.A., Virginia, Clayton 31 (holo: BM). Distribution: almost pantropical extending to temperate areas; in Australia in N.T. & Qld; in NT known from Bathurst Island and near McMinns Lagoon. Habitat: wet open grassland on the margins of drainage depressions. Flowering: Mar. Abundance: rare in NT. Proposed IUCN category: e(b1,2) Utricularia triflora P.Taylor Type: McMinns Lagoon, SE of Darwin, N.T., Must 702 (K: holo; CANB, DNA,NT: iso.). Distribution: endemic to N.T.; patchily distributed in the Top End (near Howard Springs, McMinns

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