Grevillea robusta - silver oak - 100 seeds

商品説明

?Grevillea robusta, also called silver oak is a large evergreen tree 18-30 m high with a straight trunk and moderately spreading crown. Leaves: Dark green above, grayish-white or rusty-silky beneath, two-pinnatifid, deeplyincised, fern-like, 150-300 mm long, leaflet margins recurved. Flowers: Golden-orange, stalked, 20-30 mm long, in terminal, bottlebrush-like sprays80-150 mm long. Fruits: Brownish-black, leathery follicles about 20 mmlong, containing one or two flat, winged seeds.Habitat/ecology: This large, evergreentree has been used extensively in reforestation programs. The leaves produce anallelopathic substance that inhibits the establishment of all species, includingitself apparently. It grows well in dry areas between 350-1,600 m.Native range: Eastern Australia.