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Unknown arum
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Topic: Unknown arum (Read 1135 times)
anita
Full Member
Posts: 118
Country:
Unknown arum
«
on:
March 08, 2010, 09:33:48 AM »
Hi,
Can anybody identify this arum? As I'm in the Southern Hemisphere it's an autumn bloomer. It's about 45 cm tall and the leaves are strongly arrow-shaped. There's no appreciable scent.
Thanks Anita
«
Last Edit: March 08, 2010, 09:43:26 AM by anita
»
Logged
Dry Gardener (rainfall not wine). Adelaide, South Australia. Max temp 45C min -1C
Pascal B
Guest
Re: Unknown arum
«
Reply #1 on:
March 08, 2010, 11:10:34 AM »
Anita, your Arum is either Arum concinnatum or Arum hygrophilum. Given the yellow appendix and more "open" and broad spathe I would
not
opt for Arum concinnatum as the most likely ID. Concinnatum has the classic arrow shaped leaves, hygrophilum has the unusual habit of having the lateral sides of the leaf spread more outwards and curl against eachother at the base of the leaf.
«
Last Edit: March 08, 2010, 06:39:17 PM by Maggi Young
»
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Oron Peri
Middle Eastern Correspondent for the Forum
Hero Member
Posts: 1500
Country:
Living in the Galilee Region, min. temp. 5c max 40
Re: Unknown arum
«
Reply #2 on:
March 08, 2010, 05:18:17 PM »
Anita
It is Arum hygrophilum.
Pascal, A. concinnatum has a yellow spadix, and generally it set flowers by the end of its growth season when leaves start to dry out.
Also the shape of the spathe is quite different.
Logged
Tivon, in the lower Galilee, north Israel.
200m.
Pascal B
Guest
Re: Unknown arum
«
Reply #3 on:
March 08, 2010, 05:53:10 PM »
Oops......, I meant one thing and said the other, forgetting the "not" after the "would"....
I better leave multitasking to people who can...
Oron, I agree with you but just one note though, although concinnatum in general has a yellow appendix, it is very variable (in contrast to hygrophilum) and does occur with purple appendices plus has forms with the same purple edge of the spathe blade. I have grown this species in the past and it also does flower at the middle or end of its growing season, dependant on the growing conditions.
«
Last Edit: March 08, 2010, 06:15:31 PM by Pascal B
»
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Oron Peri
Middle Eastern Correspondent for the Forum
Hero Member
Posts: 1500
Country:
Living in the Galilee Region, min. temp. 5c max 40
Re: Unknown arum
«
Reply #4 on:
March 08, 2010, 06:30:12 PM »
Pascal thank you for the information,
seen only yellow and orangy colored spadix in the wild in some of the Greek Islands,
often with the spathe's purplish edges as you describe.
I think drying out the leaves before flowering has a reason, because in some of the arums the many large leaves block insects from accessing the flowers, other species lower down the leaves while blooming such as the case of Arum dioscoridis.
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Tivon, in the lower Galilee, north Israel.
200m.
Ezeiza
Hero Member
Posts: 1061
Re: Unknown arum
«
Reply #5 on:
March 08, 2010, 07:00:29 PM »
Oron, that is fascinating.
Logged
Alberto Castillo, in south America, near buenos Aires, Argentina.
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Unknown arum
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