Dendrobium species

I'm hoping someone knows what this is. The flowers look like a white form of D leucocyanum and the plant looks like D petiolatum. The flowers are about 1/2" (1.25 cm) and the pseudobulb plus leaf is 2" (5cm) tall. The inflorescence can emerge from the top or side of the pseudobulb, no fragrance.

 

Peter, the flowers are definitely similar, but the plant is really different, not only in size but also the shape of the psbs. Thanks for the suggestion and links. Co-incidentally the specimen plant was in the exhibit I did with 3 friends last year at POE, I don't remember for sure, but it was either Judy Carney or Cindy Hill (who told me today that you care coming to the Bay Area).

 

Ron Parsons has looked at it several times and doesn't know what it is. He isn't impressed with it, but I like it.

 

Peter, the flowers are very different from D petiolatum. I have two somewhat different forms of petiolatum, but only have images of one of them which I am posting here.

I rarely go to the Oakland meetings, but I am considering coming down to hear your talk. It is a bit of a drive for hybrids (nothing personal, you understand).

 

Thank you all for looking. Any recommendations on a taxonomist I could ask?

 

Piotr, Thank you very much. You came up with two I didn't know. I feel very comfortable with Dendrobium constrictum ID. The flowers are very similar. From the images, mine might have a slightly wider dorsal sepal, but maybe not. The plant however does look the same.

The D rupestre looks different in both flower and foliage, but much closer than most of what I've looked at. Definitely something some thing I would like to grow.

 

Thank you Linda, and please thank Mikael for his input. I hope at some point he will be interested in posting on OI. He has helped me with identification of a couple of plants and I'm sure we have a lot of the same interests in orchids.