Grevillea nematophylla, commonly known as water bush or silver-leaved water bush,[2] is a species of flowering plant in the family Proteaceae and is endemic to Australia. It is shrub or small tree with simple or pinnatisect leaves, the leaves or lobes linear, and branched, cylindrical clusters of cream-coloured flowers.
Description
Grevillea nematophylla is a shrub or tree that typically grows to a height of 1–8 m (3 ft 3 in – 26 ft 3 in) and has rough bark on its main stem but smooth branchlets. Its leaves are linear, 40–300 mm (1.6–11.8 in) long, sometimes pinnatisect with 3 to 10 linear lobes, the leaves or lobes 0.5–1.5 mm (0.020–0.059 in) wide. The flowers are arranged in branched clusters, each cluster cylindrical and 60–140 mm (2.4–5.5 in) long, and are cream-coloured, the pistil 5–15 mm (0.20–0.59 in) long. Flowering occurs in November and December, and the fruit is a glabrousfollicle 13–24 mm (0.51–0.94 in) long with a rough surface.[2][3]
Grevillea nematophylla Makinson subsp. nematophylla[7] (the autonym) has flowers with the pistils 5–15 mm (0.20–0.59 in) long.[2][8]
Grevillea nematophylla subsp. planicostaMakinson[9] differs from the autonym in having leaves and lobes that are T-shaped in cross-section, the flowers with the pistils 7–9 mm (0.28–0.35 in) long.[10][11]
Grevillea nematophylla C.A.Gardner subsp. supraplana[12] has leaves that are three-quarters round in cross-section, the upper surface concave, and the pistils 5–5 mm (0.20–0.20 in) long.[13][14]
Distribution and habitat
Subspecies nematophylla grows along drainage lines and near soaks in the Avon Wheatbelt, Coolgardie, Great Victoria Desert, Murchison and Yalgoo bioregions of south-western Western Australia,[2][8] in inland South Australia[15] and southern parts of the Northern Territory.[16] It was previously known from western New South Wales, but is now assumed to be extinct in that state.[17]
Subspecies planicosta occurs in southern inland Western Australia from near Balladonia to the ranges north of Kalgoorlie and north-east of Laverton in the Coolgardie, Great Victoria Desert, Murchison, Nullarbor bioregions.[10][11]
Subspecies supraplana is found from Meekatharra and Yalgoo to near Rawlinna in the Avon Wheatbelt, Great Victoria Desert, Murchison, Nullarbor and Yalgoo bioregions, and on the Nullarbor Plain in South Australia.[13][14]
^ abcd"Grevillea nematophylla". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 21 July 2022.
^von Mueller, Ferdinand (1859). Fragmenta Phytographiae Australiae. Vol. 1. Melbourne: Victorian Government Printer. p. 136. Retrieved 21 July 2022.
^Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 259. ISBN9780958034180.
