My new dendrobium came with two very nice-looking canes about ten inches tall, and a newer one, also healthy, which is about three inches so far. But then it has this other cane, only about an inch tall so I'm assuming its newer, with only two small leaves which are yellowed and closed. Today one of those leaves fell off when I touched it.

I'm wondering if anyone can tell what is wrong with this plant, and what if anything I might do for it. Since it is in bloom, I'm assuming i should wait to repot.

The tag says D.?URANA MAX #2, where '?' Represents a letter that's mostly rubbed off so I can't tell what it is. Could be a D, B, R, or P.

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