Thursday, March 11, 2010

Oncidium varicosum

Oncidium varicosum - Flower photo by Richard LindbergThis Oncidium varicosum is an example of why I need to keep better notes than I do. I don't have a specific memory of when and where I got it, and my earliest note says "repotted" and is dated July 2008. It bloomed last year because I took the flower picture.

Oncidium varicosum - Plant photo by Richard LindbergOncidium varicosum grows in Brazil, Bolivia and Paraguay. It is cool to hot growing and blooms in summer and fall with many yellow flowers on spikes up to 5 feet long.

Even potted in rock the plant will get too heavy on one side to be stable as soon as the next pseudobulb develops. To fix that I am going to set the whole thing in a clay pot rather than re-pot.

It bloomed in the Napa greenhouse but it is in the Sonoma greenhouse in the display window. The spike is only moderate length, nowhere near the "up to 5 feet" that the literature suggests. Still, it is a respectable display of flowers. After blooming I may leave it in Sonoma as the cleanup of the Napa greenhouse continues.


  1. Nice. Looks like a serious climber and a good candidate for mounting.

  2. Mounting might be the thing to do with it. I am adding more space for mounts and it could be quite an effective display if I orient it properly as spikes grow.

  3. One of the plants we rescued from Sydney has just bloomed and thanks to your pictures I can now "somewhat" identify it as an oncidium varicosum. I found it underneath the King orchid and mixed with garden trash that was destined for the bin. Four years of utter neglect didn't kill it! Six months after repotting and it has put out heaps of new growth and a beautiful flower display.

  4. It is always good to know what is in one's collection. It helps us figure out how to care for it.

    I'm glad I was able to help.

  5. These are easily mounted and like to be.