I vote for none of the above.. certainly not a Kentia (or cluster of Kentias), or cluster of Majesties... petioles sure look like a Chamaedorea species and not a Dypsis... but not like any Chamaedorea cataractarum I have ever seen. But perhaps it is truly amazingly stretched (but cat palms usually don't get that stretched even in low light). I have seen some Cat palms 6' tall, but they still don't look like that.. it is not suckering like a cat palm. Suspect some other Chamaedorea though am not coming up with a good guess right now.

M Hello anyone. Here are my experiences. I live in San Diego, California and after the wild fires destroyed my entire house, I rebuilt and re-landscaped with palm trees. After knowing nothing about those plants and some failures, I now have a palm tree "forest" in my front yard. So...king palms look magnificant in "singles"; avoid washingtonians because in a few years they will too tall to cut/trim. Avoid queen palms because they must be trimmed when they get tall. Windmill palms are trouble free but must be trimmed after they reach 15' high or so. I went to Target garden center and purchased several kentia palms (3 plants in each pot) for $19 each and took them home and very very carefully seperated them individually and planted them outside as understory palms. The first 20 months they grew slowly but didn't burn and were fine. Now the sun doesn't bother them at all and they are growing faster and faster. Kentia palms and king palms grow wonderfully and somewhat fast indoors as house plants. Have them but never over water them. Use palm fertilizer and occasionally fish fertilizer. Beautiful house plants....then move them outside when too large and acclimate them and put them into the ground in your landscaping. A good outdoor palm is the fox tail palm...it also is self -cleaning. But good house palms for fast beautiful growth are kentia, king, and cat palms.

If the soil feels dry, the problem is not overwatering. When you water, make sure that the water saturates the soil and not merely leak out the bottom. Sometimes this happens with peaty soils that have dried out excessive..., it becomes difficult to moisten the mix.

WATER AND MORE WATER! They should have been kept soaking wet from the day they were planted. It wouldn't stop some sunburn- but would have mitigated the damage. For the Howeas its going to be a slow recovery- years. The King palms are much faster..but the browned trunk worries me. That's a deep burn. I know it sounds like you watered often enough...but probably not enough or deep enough. A watering ring around those palms filled when watered and then re filled would help. You might as well cut off the dead fronds and start from there. Those are some of the best palms to grow..but the start can sometimes get off on the wrong foot in a hot summer. You might be happier to add more palms alongside now that temps will be going down so you have something nice to look at for now. It would be worth it instead of getting all frustrated waiting for those to recover. Best luck!