Do plants get cancer? The answer is, ‘Yes’, if cancer is defined as dysregulated cell growth, but typically plant cancer is different than in animals. Plant cells have a rigid cell wall that limits metastatic spreading of cancer cells through the plant. Instead, the tumor grows as a single mass called a gall. Also, most plant tumors/galls are caused by a viral infection that disrupts the normal expression of genes. Here is an example that I found in my garden. I think this is an onion bulb where the new shoot has developed as a tumor of abnormal stem/leaf cells.
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Daffodils (Narcissus sp.) are classics of spring but not so common outdoors in San Diego gardens because of our warmer climate. Many years ago, I planted the bulb from a (supermarket) potted gift bouquet into my garden. Each year if it flowers (like this year) I know it has been cooler and wetter than normal. Most years only the leaves emerge without a flower.
Quintessential ToadstoolQuintessential Toadstool
Amanita muscaria. I think this is the prototype for the Disney-esque toadstool seen in cartoons and movies. Ibotenic acid and muscimol are the moderately toxic neurotoxins from this fungi.
Chaparral Monkey FlowerChaparral Monkey Flower
I bet there are many so called “monkey flowers” around the world and despite the absence of monkeys in southern California this is our bush monkey flower, Diplacus aurantiacus. It is perhaps our most common and distinctive flowering plant in the coastal chaparral. Photo courtesy of S. Castellana.