Yacca or Grass Tree_2

Xanthorrhoea sp., one of ca. 30 species of the genus Xanthorrhoea, indigenous to Australia. (cf. www.pawlan.com/Monica/xanthor/#species )

"These remarkable plants have a lifespan of 600 years but are very slow-growing. The trunk takes a decade to form initially as it is composed of a mass of old leaf bases held together by a natural resin. It is then a further 20 years or more before the mass of thin, linear leaves rises above it. From then on, it grows only about 1-2cm (0.4-0.8in) in height per year."
www.grasstree.com/