BTW, i suggest changing the tag to longifolium x popowii. This is to avoid confusion.

The species epithet warscewiczianum is a mess and now describes the plant previously called Phrag wallisii (lighter coloured pouch) This is because the herbarium specimen used to describe the dark coloured wars. was actually a wallisii.

You may find more info somewhere via. google. This complex has confused people because of this.