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Though unfortunately not a raging dinosaur, the Wollemi Pine has been around since the T-rex roared. And, as further evidence that Australia is an otherworld unto itself, surviving Wollemis were discovered in a canyon in 1994 only 124 miles west of Sydney. This was surprising, because the trees were known previously only by impressions of their distinctive leaves left in ancient rock. So excuse Dr. Barbara Briggs of Sydney’s Royal Botanical Gardens her breathlessness in calling the find “one of the most outstanding discoveries of the century.” Unlike the fake dinos of Jurassic Park, the living Wollemis have presented horticulturists the opportunity for cultivation, and they are busy propagating—setting up seed-collecting nets and plopping the resulting buds into planters for discerning floraphiles. The plant is fast-growing, responds well to light, and likes acidic soil. And perhaps a “living fossil” would spruce up your patio. So bring your potting shears to the “Wollemi Pine: A Living Fossil” exhibition, on view beginning at 10 a.m. (daily through May 28) at the U.S. Botanic Garden’s Conservatory, 100 Maryland Ave. SW. Free. (202) 225-8333. (Dave Nuttycombe)