Zantedeschia aethiopica is found in usually seasonally damp places in a wide range of the winter rainfall area. Known as Arum lilies or Calla lilies in different parts of the world, they are a popular cut flower which can be fragrant. This species has naturalized along the Northern California coast and is found in many places, including abandoned homesteads, blooming in spring. Photos by Mary Sue Ittner show some of the naturalized plants including a clump at Salt Point State Park.
'Child's Perfection' (syn. 'Childsiana') is a dwarf selection of Zantedeschia aethiopica that grows to about 18 inches (0.5 m) tall in moist soil and partial shade. The arachnids on the flowers in the second photo are Opiliones, commonly called harvestmen or daddy-long-legs. Photos taken May 2007 by Jay Yourch.
'Green Goddess' is a variety with green tipped leaves. Photo from Janos Agoston.
'White Giant' is a huge selection of Zantedeschia aethiopica with spotted foliage up to about 48 inches (1.2 m) tall and flower spikes up to 72 inches (1.8 m) tall. Photos taken June 2009 by Jay Yourch.
Plants exhibit guttation. Guttation (from the latin gutta - speck, spot or drop) is the production of water droplets from plant leaves. The time lapse video by David Pilling shows a leaf tip of Zantedeschia aethiopica for about six hours (one frame every 50 seconds) after the plant was put in a pot of water.
Photographs by David Pilling. The first two show the roots; it is easy to remove a section and grow a new plant. The last photo shows developing flowers.
The next two photos show the base of the spadix; the white objects are female flowers (the genus is monoecious with separate male and female flowers). The white material near the top of the spadix is pollen which emerges from the male flowers and forms strings; the last photograph is about 0.5 mm wide. As the pollen is removed more appears to replace it. The pollen photos are of the same flower as the first two photos but a week later, showing how the spadix color changes.
When pollinated each of the female flowers will produce a seed pod; their development can be seen in the photographs. What looks like a large white petal is a bract (modified leaf), as the seeds develop it partially dies back and wraps around the seeds protecting them as captured in the second photo. The last two photos show the seed head ripening; the coin is around an inch in diameter.
Photos of seed pods, a seed pod and the seed it contained, and washed seed; all on a 10 mm grid. Fifty seed pods were produced from the seed head shown above. Photograph four shows how the seeds are packed in a seed pod.
Some of the seeds in the first three photographs above were put in a zip seal bag with moist kitchen paper on the 8th October 2012, kept at room temperature 65-70 °F and started to germinate on the 6th November; the final photo shows the seedlings in a 2" square pot on the 4th December.
Almost all the photos in this section are of the same flower stem, they cover a period from the first of June until the seeds were ripe at the start of October.
The time it takes to get a flowering plant from seed varies, with a sufficiently vigorous seedling in ideal conditions it is possible in as little as six months; other specimens may take a few years. A factor is if the plants can be kept growing through the winter; foliage is very sensitive to frost and will easily be killed, the roots can also be killed by frost.