Endemic Australian genus, 66 species, most from the SW of WA (where else?).
Smallish woody shrubs. Very nice flowers. Require excellent drainage. Most easily propagated from seed, although germination can take up to 6 to 8 weeks, so, I’m told, it’s best to not get impatient and throw out the seed trays too early.
Volunteers at King’s Park in Perth have grown a selection of 18 species this year (2015) which are going be on sale on March 22nd. Sounds like a good reason to be in Perth that day.
They’ve written about the genus here, which includes a link to photo’s by an enthusiast in Esperance. And Flikr user Westflora has some pictures here.
Needless to say I’m dreaming about growing some when I get back to WA…well, it’s nice to dream. WA seed supplier Nindethana stocks quite a few species, and by cross-referencing these with Florabase, I’ve come up with a short list that might grow well in the Mandurah (WA) area:
Petrophile biloba – very handsome (according to John Wrigley), if straggly shrub to 2 m, with nice fluffy pink flowers. From the pictures I’ve seen: looks gorgeous! A touch northerly for Mandurah, but very close…
P. brevifolia – erect, multi-stemmed shrub to about 1 m, very nice yellow flower. Originates north and east of Perth.
P. ericifolia – bushy shrub to 1m by 1m, yellow flower. Very handsome too. Occurs naturally way out to the east, but you know, Mandurah is getting hotter and drier, so I’m sure it will be OK.
P. linearis – erect shrub to 50 cm, “outstanding and charming”, native to Mandurah.
P. macrostachya – erect, compact, prickly shrub to about 1 m. Naturally occurs north of Perth. Gorgeous flower.
P. serruriae – erect shrub to 2m by 2m wide, very nice yellow flower. Againa, occurs naturally a bit to the east of Mandurah, but close enough to be interesting.
Images below are all stolen from the internet…