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 Euphobia obesa : male or female plant?

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cactimay



Number of posts : 37
Location : Victoria
Registration date : 2014-05-17

PostSubject: Euphobia obesa : male or female plant?   Sun May 18, 2014 5:03 pm

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Had this 10 inch tall Euphobia obesa for many years . Are the flowers male or female? Thanks.
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Eck



Number of posts : 96
Location : VIC
Registration date : 2012-12-04

PostSubject: Re: Euphobia obesa : male or female plant?   Sun May 18, 2014 6:10 pm

cactimay wrote:

Had this 10 inch tall Euphobia obesa for many years . Are the flowers male or female? Thanks.

I was researching this just recently.  Checkout the drawings in this Cactiguide topic:
"Is this Euphorbia obesa a male?"
http://cactiguide.com/forum/viewtopic.php?t=2150

Essentially, the flower on the male plant bears the pollen.  If it doesn't, it's a female.
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Cereoid

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Number of posts : 137
Location : Sydney
Registration date : 2013-04-04

PostSubject: Re: Euphobia obesa : male or female plant?   Sun May 18, 2014 7:14 pm

The cyathium of Euphorbia spp. is a specialised inflorescence with the outward appearance of a single flower. It actually contains multiple individual unisexual flowers, a ring of male flowers on the periphery and one female flower in the centre. In dioecious euphorbias only one sex of flower in the cyathia become fertile. In the case of your plant (a male), the male flowers around the periphery are mature and the female flower in the centre is reduced and unreceptive. In a female plant the female flower is visible (and the male flowers are reduced) and the style protrudes from the centre of the cyathium.
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