Most gardeners are familiar with arums, but few know Engler’s arum…aka: Englerarum hypnosum, a genus first recognized in 2013. This horticultural oddity was kicked out of several better known aroid genera (Colocasia and Alocasia) due to its odd genetics (anastomosing laticifers and colocasioid venation). The lone species of Englerarum can be found in forests from Southwest China to Southeast Thailand, where it grows as a lithophyte (lives on rocks) on karst limestone, spreading by rhizomes to form large colonies. It has been surprisingly winter hardy for us, surviving upper single digits F, when growing in typical garden soils, where it reaches 5′ in height with 30″ long leaves. Here is our patch at JLBG this summer.
For two decades, we’ve grown the amazing Chinese jack-in-the-pulpit, Arisaema saxatile with its delightful lemon-fragranced flowers. The most frustrating part was its slow offsetting nature, which meant we rarely had any to share.
Eighteen months ago, we dug our main clump and moved most of it from a well-shaded site to a location that would get a couple of hours of afternoon sun. To our surprise, it loved the new site, where this summer, it produced two large seed heads which will be harvested shortly. This is the first sign of seed in 20 years, so hopefully in a few years, we have some good numbers to share.
The foliage of Amorphophallus konjac ‘Gordon’s Gold’ is truly superb in the gardens, looking like a forest of small golden palm trees. This is a great discovery from California plantsman, Dave Gordon.
This year, one of our plants had a leaf chimera mutation so that half of the leaf mutated to green, while the other half remained yellow. Most likely, this is a one year occurence.
Just flowering at JLBG is our largest clone of the hardy aroid, Dracunculus vulgaris, that we named ‘Supersize’. This one produced a massive 30″ inflorescence. A typical length is 15-20″. We’d be curious is anyone has grown one any larger. As you can imagine, it was quite a feast for the pollinating flies.
Flowering in the garden now are the amazing and very rare white-flowered Dracunculus vulgaris. This wild and crazy aroid, which typically has a red/purple inflorescence, hails from the Mediterranean region, centered around Greece and Turkey. The late aroid guru Alan Galloway worked extensively to breed these, and since we now hold his collections, we wanted to share the wonder of his work. It is our hope that tissue culture will be able to make these amazing color forms available one day.
The holiest of arums, Arum palestinum is in full flower at JLBG. We don’t grow many Palestinian natives, but this one has thrived since 1993. How’s that for a traffic stopper?