Thursday, April 1, 2021

Biarum zelebourii flowering for us for the first time

Biarum zelebourii flowering

This is a distant relative of the Calla Lily. It is found in Syria - this one came, in a roundabout fashion, from seeds collected outside Qalaat Majm in 1991. We purchased a tuber from a grower in the UK last year (their listing for the species is here). I am unable to find a single photo of this species on the web, so decided to put up at least one photo!


Biarum zelebourii

Biarum consists of about 21 currently recognized species. They grow around the Mediterranean and into the Middle East, none of them like snow or freezing temperatures, and all are dormant over the long, dry summer months.

Most species bloom in the Fall, with a few odd ones deciding to flower in the Spring after the leaves have died down.

I've been interested in Biarum for about 30 years, and have grown them before only to discover squirrels seem to delight in digging these up and eating them. Last year our son, BD, was looking through a catalog of unusual bulbs with me and fell in love with another species, Biarum davisii, immediately. He decided to do things to collect enough money so he could have his very own. Unfortunately, we ordered a bit too late and they were sold out. Thus began a quest across three continents via the internet, it having been 2020, to find and acquire his first Biarum.

We finally had success in Greece, where many of the species are native. A note about buying plants outside the USA - you will want to take a minute to apply for an import permit with the USDA so customs doesn't just take your plant. Use the PPQ Form 587 to apply for your permit. Expect it to take about two weeks to issue, and there are more rules that have to be followed (a phytosanitary certificate is needed, for example). Then you can safely bring in your plants from overseas.

One of the really neat things about these plants is how they are pollinated - they emit heat (there are "warm blooded" plants!?!) and trap flies (they smell like rotting things, much like their larger kin, the Amorphophallus or Titan Arums). Unlike them, the smell is very localized. The spadix (the large "tongue" emerging from the flower) appears to be something insects can crawl into the flower on. Once there, they encounter obstacles that force them past pollen bearing structures and the female parts of the flower, in some species trapping the bugs until the next morning.

For comparison, here is our Amorphophallus konjac finishing flowering (about four feet tall) alongside our son's Biarum zelebourii in bud:

Amorphophallus konjac flower and Biarum zelebourii flower for scale comparison

We grow these in our standard "desert bulb" soil mix (1 part coir fiber by volume, 1 part pearlite by volume, 1 part agricultural grade pumice by volume, and some slow release organic bulb food, and generally some garnet sand) in deep but small pots (the pot for the Biarum in the above photos is 3" wide and 7" tall).