Marah macrocarpa

Wild cucumber is the first annual growth to appear with the winter rains, and it’s still going strong now, five months later, with fresh vines, flowers, and maturing fruit all festooning whatever they can scramble over. I cut a fruit open to see how the seeds are going; they are still very soft. When the fruit ripens, it will explode and spray the large, hard seeds out in all directions.

Marah macrocarpa has an unusual germination method. The initial shoot emerges from the seed and grows downward into the earth. This shoot then splits, one part swelling to form a tuber, while the second part grows back to the surface and becomes the vine. The large, hard tuberous root can reach several meters in length and weigh in excess of 100 kilograms, leading to one of the plant’s common names, manroot.

Eriodictyon crassifolium

Yerba santa (“holy herb”) is a hairy perennial shrub that‘s found in chaparral and coastal sage scrub, most often at higher elevations. The very aromatic leaves are lance-ovate to oval, 5 to 15 cm (2 to 6 inches) long, with a scalloped margin. Soft woolly hairs grow on both sides. In traditional medicine, it has been used to treat respiratory infections. I don’t often hike in the highest parts of the Santa Monica Mountains, so it was a treat to get up there and encounter this plant growing in profusion along the trail yesterday.

Charmlee

Our sixth nature journal club meetup was our biggest and (arguably) best yet! Certainly our best lunch spread—we are totally rocking the picnic buffet. Seventeen of us enjoyed perfect winter weather (70° and sunny) at charming Charmlee Wilderness Park in western Malibu. Such a joy.

Backbone #6

Easy section this time, in one of my favourite parts of Malibu Creek State Park. It was fun to see thousands of acorns sprouting on the forest floor, even knowing that only the slimmest fraction of them will grow into trees.

Schizophyllum

The widespread Schizophyllum genus contains six wood-rotting species. Schizophyllum mycelium only needs to generate one set of fruiting bodies per year. Unlike some mushroom species, split gill fungi have the ability to dry out and rehydrate, allowing them to open and close numerous times throughout a growing season. This is an excellent adaptation for climates with sporadic rainfall, and surely contributes to their success.