Drynaria sp. MD 17-69

Our collection from Vietnam of this fascinating epiphytic genus.  This was growing on a tree trunk on a small limestone ridge populated by a mix of frost-tolerant and frost-intolerant species.  The hardiness of this remains to be tested here - maybe a warm zone 8b? - but it will be planted out spring of 2024.  Excellent drainage is likely key to improved hardiness and ours is going in a tufa wall.  Spreads by creeping rhizomes and has dimorphic leaves with persistent basal fronds and fertile foliage fronds.