Sketching the Pandemic Year Week 33 Aug 9-14
Four O’Clock ( Mirabilis Jalapa) flowers true to their name bloom in the evening and spread a fragrance in the yard. As summer progresses, the plant is full of blooms. They come in different colors and even as ‘kaleidoscope wheels’ variety. We planted these in the garden because they reminded me of my childhood home in India. But I have since learned that they are native to Peru and have been naturalized in most tropical countries, Europe and Asia - it is a perennial in the tropics but grows as annuals in temperate zones.
I vaguely remembered from basic genetics class in college that they had some peculiarities regarding passing of traits.
Wikipedia helped out: “A
round 1900 Carl Correns used Mirabilis as a model organism for his studies on cytoplasmic inheritance. He used the plant’s variegated leaves to prove that certain factors outside the nucleus affected phenotype in a way not explained by Mendel’s theories. Correns proposed that leaf color in Mirabilis was passed on via a uni-parental mode of inheritance. Also when plants with dark-pink flowers are crossed with white-flowered plants, light-pink-flowered offspring are produced. This is seen as an exception to Mendel’s Law of Dominance because in this case, the dark-pink and white genes seem to be of equal strength, so neither completely dominates the other. The phenomenon is known as ‘incomplete dominance.’
FourO’Clock watercolor and ink by Meera Rao
More wonderful oddities about this flower from Wikipedia: “ Usually the flowers are yellow, pink and white, but a different combination of flowers growing on the same four o’clock plant can be found. Another interesting point is a color change phenomenon. For example, in the yellow variety, as the plant matures, it can display flowers that gradually change to a dark pink color. Similarly, white flowers can change to light violet. Despite their appearance, the flowers are not formed from petals - rather they are a pigmented modification of the calyx. Similarly, the calyx is an involucre of bracts. The flowers are funnel-shaped and pentalobed, they have no cup (replaced by bracteal leaves) but are made of Corolla…. The flowers are pollinated by long-tongued moths of the family Sphingidae, such as the Sphinx moths or hawk moths and other nocturnal pollinators attracted by the fragrance.”
The glass and ink ‘Our River’s Ancestors’ by Marvin Oliver is the featured photograph for the week in the Smithsonian Engagement Calendar2020. I had concentrated mainly on the colors when deciding what to sketch for the week. But I found a different connection while reading the explanation of the piece in the calendar: “In ‘Our River’s Ancestors’ , Marvin Oliver uses glass to evoke the rivers and salmon that have intertwined Quinault lives for millennia. The etched image is from a photograph of Native fishermen at Celilio Falls on the Columbia River. This piece is a part of ‘Ancestral Connections’ an ongoing exhibition at National Museum of American Indian in New York which explores how contemporary artists draw on aspects of their heritage to create new and compelling works of art”
