Two questions....

costaricafincaNovember 13, 2007

First one, is what name is this Rex begonia?

Second question is, what is this 'bud/knub on the leaf and is this unusual? I have never seen one before.

Thank you for reporting this comment. Undo
hcmcdole(z7)

Well, I don't know the name of the rex but the bud/knob on top of the leaf is the formation of new plantlets (at least that is what most of mine do when I propagate from a leaf cutting). Typically you see them after the leaf is severed and rooted. Maybe with your climate it doesn't matter.

    Bookmark   November 13, 2007 at 1:32PM
Thank you for reporting this comment. Undo
costaricafinca

When I propagate a leaf, I get a 'miniature plant, not a 'flower/knub' like this.

The 'bud' is prickley, not soft and doesn't resemble the small bloom that is produced.This photo shows it from the side.

The small 'bloom'

    Bookmark   November 13, 2007 at 2:28PM
Thank you for reporting this comment. Undo
hcmcdole(z7)

Your photo did not come through.

Here is what I see mine do if it helps you any.

These were all started in water.

Taliensis which was from last winter. I potted the leaf up after roots formed in water. It is showing little leaflets in this picture.

'Purple Curl' which I started 4 weeks ago.

'Emerald Star' just starting the "budding/knobbing" for lack of a better name for the bumps.

I don't know the name of this beonia (but it is a beauty when full grown) showing it has got some good size plantlets after several weeks.

Finally 'Peace' which has developed leaves after 6 to 7 weeks.

    Bookmark   November 13, 2007 at 3:30PM
Thank you for reporting this comment. Undo
alenka(6)

Oh, how interesting! When I rooted begonia leaves, plantlets would come up from the soil, from the end of the petiole. And in your pictures, hcmcdole, you have them come up from the base of the leaf itself! How cool! Is this something particular to rexes? I only ever rooted rhizomatous begonias... Do you do anything to the base of the leaf (say, do you scratch it, or something like that?) to get the plantlets to grow from there? Do you set the leaf so that its base is touching the soil/water? This is very interesting, thanks for posting the pictures!

    Bookmark   November 25, 2007 at 5:57PM
Thank you for reporting this comment. Undo
hcmcdole(z7)

Rexes are more likely to sprout from the petiole/blade union than other rhizomatous begonias but the first picture was of B. taliensis which is not a rex. Rexes will also sprout from the soil as well as the center of the leaf.

Here is another taliensis with budding on the leaf and sprouts coming up in the soil.

Here is B. 'Comtesse de Montesquieu' exhibiting the same behavior as most rexes. Note the leaflet coming up from the soil on the bottom edge of the mother leaf. All the other leaflets are at the union.

Finally here is B. 'Emerald Star'. Is it a rex or something else? The leaves are similar to B. 'Benitochiba'.

I should mention that B. soli-mutata does exactly the same thing - buds at the leaf union and from the soil.

    Bookmark   November 25, 2007 at 8:35PM
Thank you for reporting this comment. Undo
alenka(6)

Thanks for the explanation and more pics! This is very cool :)

    Bookmark   November 25, 2007 at 10:07PM
Sign Up to comment
More Discussions
My Special Angel
I posted this in the house plants forum but thought...
Jessie Tyler
Breaking dormancy
All my B. grandis tubers are showing their 'eyes' as...
woebegonia
Winter Feeding of Rex Begonias
I am losing a couple of my Rex Begonias and wonder...
neuf
Begonia started from seed BUT no tuber grown???
I started a couple of tuber Begonias from seed this...
started_with_bean
started rhizome cutting...leaves shriveled
hello,i have a b.northern lights that has been sliding...
woollady
Sponsored Products
Hillsboro Two-Line Estate Lawn Address Plaque
Home Decorators Collection
Milford Bronze Two-Light 15-Inch Convertible Pendant with Clear Glass
$139.90 | Bellacor
George Kovacs | P1602 Table Lamp
$240.00 | YLighting
Adjustable Ornament Keeper
$109.50 | FRONTGATE
Desk Lamps: Wall Street 16 in. Brushed Steel Desk Lamp 32305BS
$99.00 | Home Depot
Geo Compact TV Credenza
Overstock.com
American Drew Antigua Splat Back Dining Side Chairs - Set of 2 - ADL4351
$550.00 | Hayneedle
Box Square Frost Diffuser Wall or Ceiling Light
Lightology
© 2015 Houzz Inc. Houzz® The new way to design your home™