Awkward Botanical Sketches #5: Leaves of Yellowstone Edition

Earlier this month, I met up with Eric LoPresti and others at Yellowstone National Park to help take a census of Abronia ammophila, a rare plant endemic to the park and commonly referred to as Yellowstone sand verbena. Abronia (a.k.a. the sand-verbenas) is a small genus of plants in the family Nyctaginaceae that is native to western North America. Several species in the genus have fairly limited distributions, and as the common name implies, members of this genus generally occur in sandy soils. A. ammophila is no exception. A report written by Jennifer Whipple and published in 2002 described it as “restricted to stabilized sandy sites that lie primarily just above the maximum splash zone along the shoreline of [Yellowstone Lake].” Despite the large size of the lake, A. ammophila is not widespread. Most individuals are found along the north shore of the lake, and even there it has been declining. According to Whipple’s report, “Yellowstone sand verbena has been extirpated from a significant portion of its original range along the shoreline of the lake due largely to human influences.”

Like other sand verbenas, A. ammophila has sticky leaves to which sand particles easily adhere, a phenomenon known as psammophory and an act that may help in defense against herbivory. The plant grows prostrate across the sand and produces attractive, small, white, trumpet-shaped flowers in groups of up to 20 that open wide when light levels are low, such as in the evening and in times of heavy cloud cover. The flowers are self-fertile, but insects may also play a role in pollination. It is imperative that questions surrounding its pollination biology, seed dispersal, and other factors regarding its life history are answered in order to halt any further decline of the species and ensure its survival for generations to come.

While in Yellowstone, I enjoyed looking at the all plants, several of which were new to me. I decided to sketch a few of the leaves that I found common around our campsite. I was particularly interested in discolored, diseased, drought-stressed, and chewed-on leaves, since they are more interesting to sketch and color. While I was at it, I attempted to draw a Yellowstone sand verbena seedling as well.

wild strawberry (Fragaria sp.)
Richardson’s geranium (Geranium richardsonii)
lodgepole pine (Pinus contorta)
veiny dock (Rumex venosus)
cinquefoil (Potentilla sp.)
seedling of Yellowstone sand verbena (Abronia ammophila)

More Awkward Botanical Sketches

Awkward Botanical Sketches #1

At the beginning of the year I unveiled my plan to share some of my sketches with you as I learn how to draw. This is to make up for not writing quite as many posts so that I can spend time working on some other projects. It also serves as a great motivator to actually draw, which isn’t something I do very often. Turns out that if you want to get better at something, you actually have to do it.

To help me in my quest, I collected a few books. Some are instructional and others simply feature inspirational artwork. I’ve included links to a few of these books with my drawings below. If you have any books you would like to recommend, particularly a book that has helped you learn to draw, please let me know in the comment section below.

And now on to my dumb drawings…

My first drawing in Drawing Nature by Jill Bliss

Drawing of a hibiscus flower with help fromĀ Illustration School: Let’s Draw Plants and Small Creatures by Sachiko Umoto

A sketch inspired by Carcassonne: Over Hill and Dale

Sketch of an old tree inspired by a drawing in Clare Walker Leslie’s book, Drawn to Nature

Sketch of agave in bloom inspired by an image on the back of some guy’s shirt at Treefort Music Fest

Sketch of a tiny tuft of grass I was trying to identify. It’s still a bit of a mystery.