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Laburnocytisus 'Adamii'

By Irishkate  
Laburnocytisus 'Adamii' (also known as Adam's laburnum or broom laburnum) is a horticultural curiosity; a small tree which is a graft-chimaera between two species, a laburnum, Laburnum anagyroides, and a broom, Chamaecytisus purpureus (syn. Cytisus purpureus), which bears some shoots typical of the one species, some of the other, and some which are a peculiar mixture of both "parents". +Laburnocytisus 'Adamii' is a legume, a member of the pea family Faboideae (or Papilionaceae, formerly Leguminosae). The plus sign (+) indicates its unusual origin. The plant can also be described by the formula Chamaecytisus purpureus + Laburnum anagyroides. (It has also been known as +Laburnocytisus adamii, as if it were one species, but strictly speaking it is not one species but two.) Only one cultivar, 'Adamii', is known to have arisen from this graft. Contents [hide] 1 Appearance 2 Origin 3 Structure 4 Other graft-chimaeras 5 References 6 External links Appearance[edit] Most of the tree's branches resemble the laburnum in their foliage, which has three leaflets (3-palmate) and 36 cm long, yet also with dense clusters of broom-like shoots, also with three leaflets, but only 1 cm long and a darker green. It flowers in late spring or early summer; some branches have long (2030 cm) racemes of yellow laburnum flowers, while others produce dense clusters of purple broom flowers. Remarkably, most branches will also produce coppery-pink flowers on short (815 cm) racemes, which are midway between the two "parents"; the leaves on these shoots are also intermediate. In older specimens, the proportion of broom and mixed tissues tends to decline, and the laburnum to predominate. The tree grows to a height of 7 m (rarely 8 m) and is hardy to USDA plant hardiness zone 5 in northern Europe. It requires moderately fertile, moist but well-drained soil and should be grown in a sunny position to flower well. Origin[edit] The plant originated in the nursery of M. Adam near Paris in 1825, probably as an accident;[1] Chamaecytisus purpureus is normally a low-growing plant, and grafting it onto a straight trunk of a related species would be expected to create an attractive, semi-weeping standard. In theory, other +Laburnocytisus could be developed in the same way but using different "parents". Structure[edit] A graft-chimaera is not a true hybrid but a mixture of cells, each with the genotype of one of its "parents"; it is a chimaera, created by grafting, in which the tissue of one plant grows within an outer envelope of the second plant. In the case of +Laburnocytisus 'Adamii', laburnum forms the core, surrounded by the broom.[1] Such plants are often called "graft hybrids", but as they are not true hybrids the use of this term is now discouraged.

My first attempt at a link - thank you Richard!
Taken at the Botanic Gardens in Glasgow.
My thanks also to Graham (digital-boi) for calling into Botanic gardens to find the name of this amazing 'graft-chimera'.
Many thanks to everybody for vs and cs and advice re 'Just a Leaf' yesterday.

Tags: Scotland Glasgow Flowers and plants Botanic gardens Horticulture Laburnocytisus Adamii Hybridandgraft

Voters: jovanovic, gonzalito, buxton and 42 more

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Comments


17 Jul 2013 4:00AM
That's pretty cool to have two trees in one. Good shot.......Sandy

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PaulLiley 7 2 13 United Kingdom
17 Jul 2013 5:18AM
Interesting write up and nice capture. paul
CarolG Plus
9 195 18 Greece
17 Jul 2013 5:36AM
A lovely image, Kate, and what a fascinating tree, a most unusual graft. Very well captured. Carol
andylea 7 37 1 United Kingdom
17 Jul 2013 7:44AM
wonderful comp kate brilliant colours and detail belting write up too a cracker nice one Wink
andy
17 Jul 2013 7:47AM
A beautiful image, Kate and a very interesting and informative description!

Richard
17 Jul 2013 7:51AM
Beautiful Kate. We have an avenue of white Laburnum near us. I love it.

Harriet
widtink 4 406 2 Scotland
17 Jul 2013 8:00AM
Two trees in a wanner lol . Nice write up Kate .

Rod
canonfan 6 7 United Kingdom
17 Jul 2013 8:17AM
Beautiful image accompanied by a very informative description Kate. I hope you are well
Jim
Nikonuser1 Plus
3 27 10 United Kingdom
17 Jul 2013 8:44AM
Great write up Kate, nice imageSmile

Cliff
rayme330 4 17 1 United Kingdom
17 Jul 2013 8:56AM
An interesting and well captured image and write-up, Kate. Grin

Ray
WhiteRose1 Plus
6 1.6k 148 England
17 Jul 2013 9:12AM
Fascinating stuff, Kate.

Dave
NDODS Plus
5 4.9k 125 United Kingdom
17 Jul 2013 9:26AM
An extremely interesting and informative pre-narrative supported by a beautifully composed and crafted image Kate

Regards Nathan GrinGrinGrin
Joline Plus
10 27 53 United States
17 Jul 2013 11:06AM
How very interesting, and the write up is so informative.
I do like the way this is juxtaposed with the building in the background....very, very nice.
What lovely blossoms. Well done Kate.
WesternRed.
a super shot and a great narrative,first class.

billy
nonur Plus
7 17 10 Turkey
17 Jul 2013 1:40PM
What an amazing write up, thank you for the time and trouble taken. Great compo, so beautiful against the blurred greenhouse, Kate.
boov Plus
3 2 United Kingdom
17 Jul 2013 2:10PM
Brilliant.....
Fefe Plus
4 23 31 United Kingdom
17 Jul 2013 2:20PM
Lovely!
Diane
LynneJoyce Plus
8 20 99 United Kingdom
17 Jul 2013 3:15PM
I love the way that this curious cultivar stands in front of the Pro glasshouse - very apt.
marktc 5 85 14 United Kingdom
17 Jul 2013 7:26PM
I really like this image Kate, very well captured,
annettep38 Plus
5 218 39 Costa Rica
19 Jul 2013 12:06AM
excellent contrast with the OOF glasshouse. what an interesting plant, very fascinating!
19 Jul 2013 11:35AM
I thought for a moment you had been trespassing yet again but then realised this was your original transgression TongueWink fine colours against the backdrop of the Kibble Palace Kate

Graham

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