Cattleya leopoldii

The second and third inflorescenses on my big leopoldii are now open and emitting a wonderful spicy fragrance on the patio.

Cattleya leopoldii alba

First blooming of a seedling I acquired about 2 years ago with one open flower and another on the way.  I like it and am hoping for more and better shaped flowers next year.

Another confused Cattleya

A month ago I posted on a confused C. purpurata.  Here we have another confused Cattleya, this time, C. trianae.  A while back I acquired two bareroot C. trianae from S. America.  They're just trying to get established right now.  Here is one of them, and I have to admit this surprised me.  Out of a dried sheath a single bud is emerging.  In this hemisphere this species almost always blooms in January.  It is clearly on southern hemisphere schedule.  I pinched off this bud after taking the photo.  There is no way I am going to allow this plant to use its meager resources to produce a flower.  Hopefully losing the flower will initiate a cycle of vegetative/root growth.

 

Cattleya walkeriana

My C. walkeriana started a new growth about a month ago.  The (very thick) roots started growing about a week ago, at which time I mounted it.  I was going to mount it on cork, but I decided to mount it on a piece of crepe myrtle instead.  It is tied to the mount with cotton twine and is sitting in an empty clay pot.  Once it attaches I will remove the twine.

Cattleya gaskelliana alba

I got this plant about 2.5 years ago - this is the sheath on a maturing new growth.  According to Chadwick's article on this plant, the growth will bloom immediately upon completing maturation. 

Bloom or die, Oncidium sphacelatum!

I've had this plant for about three or four years.  It was blooming when I received it, but hasn't bloomed since.  It's growing like crazy, just not blooming.  It also takes up a lot of space.  I decided to change conditions by exposing it to lots more light.  It spends part of the day in full sun - no shade cloth.  The leaves have turned a much lighter shade of green, with a couple of leaves even turning yellow.  We'll see what happens.  This is one of those situations where research on culture recommendation yields conflicting results.  At Jay Pfhal's site the symbols indicate part shade, while the Bakers  recommend that "Light should be as bright as possible short of burning the foliage..."

We shall see.

Anthocyanin

Anthocyanin is a plant pigment.  It is responsible for the purple flower color that is the most common among the so-called "unifoliate" Cattleya species (e.g., labiata, trianae, mossiae).  Besides its function in flowers, anthocyanin is produced and functions in other plant tissues including leaves and roots.  The result of this phenomenon is that Cattleyas that have unusually dark purple flowers also have more red pigment produced in other tissue types.  Here is an example of that.  This picture shows two views of a Cattleya labiata seedling I've been growing for about two years.  This plant is the rubra type, which has darker flowers.  The red pigmentation in the leaves is quite intense, especially on the undersides.  Plants that are alba or semi-alba often have leaves of a paler green compared to the typical form.