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Aristolochia sp.
Allan Gardens is one of the oldest parks in Toronto, Canada. It was founded in 1858 and has a conservatory (greenhouse), a playground and two fenced off-leash areas for dogs. It is operated by Toronto Parks who also run Centennial Park Conservatory. It is open every day of the year and is free. Rare tropical plants from all over the globe are nurtured inside five greenhouses covering 16,000 square feet. The southern “Tropical House” has a waterwheel and tropical plants like orchids and bromeliads. The “Cool House” has a waterfall, Kashmirian Cypress, small pond and citrus trees. The central Palm House houses tall bananas, bamboo and a huge Screw Pine. Another tropical house has many kinds of hibiscus, datura and a cycad. The Cactus House has a wide variety of cacti and succulents.
http://en.hortipedia.com/wiki/Aristoloch... has pictures of both and shows A.grandiflora with a long streamer from the flower. Http://zipcode.com/Plants/Plantae.asp has an extinsive species list but the photos are not so helpful
Yes that's true Christine. I'm on the look out for a decent reliable reference for Aristolochia species as on the internet there seems to be a lot of confusion, especially between A.gigantea and A.grandiflora. Pictures of both are frequently labelled as each other, if you see what I mean?! If you know of anything, I'd be very happy to hear about it.
or Aristolochia gigantea which opens up to dinner plate sized flowers a bit more floppy than its smaller cousins.