What happened with this Angraecum

[BrassavolaStars]

The general consensus seems to be temperature or sun damage. While that is unfortunate, at least I do not have to be concerned about it getting worse or be concerned about a nasty fungus that could spread to other plants.

---------- Post added at 10:30 PM ---------- Previous post was at 10:28 PM ----------

Originally Posted by Roberta

My Angraecums (including A. sesquipedale) tolerate colder than 49... I only have a few little ones in the GH. (Buds not so much, but leaves are fine) That looks a lot like REALLY cold damage... could it have been hit by a direct blast from an open vent? Or a blast of heat from the heater where that particular one just happened to be in the way?

The blast from the heater is what I am thinking happened. It has malfunctioned a couple of times this season and made temps close to 95f inside. Not only did this dry out my plants but it also incurred a multi-thousand dollar energy charge for that month . This plant was in fact in the path of the heater.

My thermometer says that the coldest it got in the greenhouse has been 50f where this particular plant was. That said, I have another temperature gauge in the colder section of the greenhouse that allegedly got down to 41f in some sections. I think I damaged some phals and others that way.