Preliminary report on a survey of Utricularia (Lentibulariaceae) in the Howard River – Shoal Bay area
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This publication contains many links to external sites. These external sites may no longer be active.; I. D. Cowie
Plant conservation; Revegetation
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Type: near Adelaide River [probably Koolpinyah], N.T., M. & N.Holtze 1164 (MEL: holo; AD, K: iso.). Distribution: N.T. endemic; mid to upper Howard River floodplain, Koolpinyah, McMinns Lagoon [no longer extant there], base of western Arnhemland escarpment near Mudginberry. Habitat: Sandy swamps and flats with Dapsilanthus and Melaleuca nervosa, usually in depressions between mounds, in water a few cm deep. Frequently with U.hamiltonii, U.kamienskii, U.capilliflora and U.lasiocaulis. Flowering: Mar.-June. Abundance: locally common in suitable habitat in the Darwin Rural area. Proposed IUCN category: NT. Utricularia involvens Ridl. Type: Malay Peninsula, Kedah Peak (Gunong Jerai), Ridely (holo: SING). Distribution: SE Asia and northern Australia (NT); in NT western Arnhem Land - Kakadu, Litchfield NP, mid Howard River floodplain, Melville Island. Habitat: wet grassland on drainage flats or along creeks. Flowering: Jan. May. Abundance: uncommon in NT Proposed IUCN category: nt. Utricularia kamienskii F.Muell. Type: near the Adelaide River [probably Koolpinyah], N.T., M. & N.Holtze 1158 (MEL: holo; AD, K: iso.) Distribution: endemic to N.T.; Howard River to Kakadu NP; Koolpinyah (W margin of Adelaide River floodplain), mid to upper Howard River floodplain, McMinns Lagoon (probably no longer extant), base of western Arnhem Land plateau. Habitat: in wet sand in swamps and seepage areas with open Dapsilanthus and Melaleuca nervosa, usually on the drier margins or mounds rather that in shallow water. Frequently with U.hamiltonii, U.holtzei, U.capilliflora and U.lasiocaulis. Flowering: Mar.-May. Abundance: locally common. Proposed IUCN category: lc. Utricularia kimberleyensis C.A.Gardner Type: W.A., Charnley River, C.A.Gardner 1412 (PERTH: holo; NSW: iso.). Distribution: endemic to northern W.A. & N.T.; in NT, Litchfield NP to near Maningrida (Darwin, Arnhem Land, Nitmiluk NP, Jabiru and widely distributed in the Kimberley Region of W.A). Habitat: Eucalyptus alba, E.bigalerita or E.tectifica woodland with grasses or with Dapsilanthus on the margins of drainage depressions, usually in water a few cm deep. Flowering: Feb. Aug, but mainly during the wet season. Abundance: common. Proposed IUCN category: lc. Utricularia lasiocaulis F.Muell. Type: near Darwin, N.T., M.Holtze 477 (MEL: holo). Distribution: northern parts of tropical W.A., N.T. QLD; widespread in the Top End from Darwin to Arnhem Land to Katherine. Widespread in E. Qld with a few collections from W.A. (Taylor). Habitat: wet swampy depressions and seepage areas with Dapsilanthus or Eriachne burkittii, usually in water a few cm deep; on sand or more clayey substrates. Flowering: Feb.-Sept. Abundance: common in suitable habitat in the Darwin Rural area and in Kakadu. Proposed IUCN category: lc.
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