Tag Archives: Natural History

Food of the Gods in the Bodie Hills

How can a scrawny plant, growing in disturbed soils, with painfully sharp spines all over its fruits come to be named  for the mythical “food of the Greek gods”—Ambrosia—a name also related, apparently, to the Greek word for immortality, αθανασία (athanasia)? Carl Linnaeus himself, the “father of modern taxonomy,” bestowed the name in 1754. But why Ambrosia? I haven’t found an explanation. The authoritative Flora North America says “allusion unclear.” One might say it’s a crusty old botanist’s joke on posterity, but I won’t impugn the intentions of the great Linnaeus. The genus isn’t native to Sweden and he may have examined only a few specimens from North America (collected by others). Maybe they smelled nice, but he probably didn’t get to know the genus well enough.

Ambrosia

Ambrosia acanthicarpa, annual bur-weed or annual ragweed, grows on disturbed, sandy soils, often along roadsides, throughout much of western—especially southwestern—North America. The plants seen here were on a dirt road near the north edge of the Bodie Hills, in Lyon County, Nevada. I’ve also seen it beside Hwy 270 at Mormon Meadow and I’ve probably overlooked it at other locations. (Though you’re not likely to overlook it if you encounter it while wearing open-toed sandals.)

It’s not immediately obvious, but Ambrosia is a composite—in the sunflower family (Asteraceae). There are more than 40 species of Ambrosia in the New World, mostly in western North America. Ambrosia now includes plants formerly placed in Hymenoclea and Franseria.

Ambrosia

Despite its vicious demeanor, Ambrosia has an intriguing anatomy. The male flowers, bulging with stamens, are tightly clustered into numerous small heads, dangling along the axis of a tall raceme. The pollen shed from those anthers causes agonizing irritation of eyes and sinuses in anyone getting a face-full of the stuff. Magnified, the pollen grains look like lethal medieval weapons.

ambrosia_artem-wikipedia

While the male flowers will insult your eyes and upper respiratory system, it is the female flowers that will draw blood from your toes and fingers. Pistillate flowers are in the axils of leaves below the staminate inflorescence—the better to catch those heavily armed pollen grains. They lack corollas and are encased, usually one at a time, in a long-spined “bur.” (These spines are derived from the paleas—in Asteraceae, the usually very thin, papery, scale-like or bristle-like “chaffy bracts” at the base of each flower.)  As the fruit matures, the bur becomes very hard. The spines stiffen and become very sharp.

Ambrosia

Did you notice the tire tracks in the first photo? Above you see evidence for one of this plant’s long-range dispersal mechanisms. The mature burs attach themselves freely to automobile tires. No doubt this is one reason Ambrosia acanthicarpa is fairly common along disturbed road shoulders and many lesser-used unpaved tracks throughout the American west.


Copyright © Tim Messick 2017. All rights reserved.
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The Checklist: New 2017 Edition

I’ve made some corrections and additions to Plants of the Bodie Hills: an Annotated Checklist, based on some fieldwork and other research during 2016. CLICK HERE to visit the Downloads page. The January 2017 edition of the checklist is a 47-page, 5.1 mb PDF file. [UPDATE, January 16: A few more typos corrected. You may want to download again if you downloaded prior to 1-16-2017.]

Checklist Cover 2017

The Bodie Hills encompass about 417 square miles in northern Mono County, California, western Mineral County, Nevada, and southern-most Lyon County, Nevada. The checklist includes 679 taxa of vascular plants, of which 575 are definitely known to occur in the Bodie Hills and 104 others are considered likely to be present. The list includes 52 families of dicots, 15 families of monocots, and 8 families of vascular cryptogams.

Travertine Hot Springs

Travertine Hot Springs has extensive alkaline wet meadows and dry outcrops.

Cinnabar Canyon

Cinnabar Canyon contains pinyon-juniper woodland and an unusual wet meadow.

Bodie Mountain

Bodie Mountain supports high-altitude sagebrush scrub with lots of
cushion plants and several alpine species.

Bodie

Bodie is in the south-central Bodie Hills.

 


Copyright © Tim Messick 2017. All rights reserved.
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Why did the Sage Hen Cross the Road?

Certainly not to impress me with it’s survival skills. I was driving toward Bodie on Highway 270, west of Murphy Spring. As I rounded a bend, the bird you see here was ambling slowly, very slowly, across the road. Whether from confusion, fright, defiance, or an instinct to be still and blend in, it was in no hurry to move out of my way, despite the lack of cover.  Fortunately, there was no one behind me. I slowed to a stop and let it toddle off the road.

Around the next bend, sometime earlier that morning, another sage grouse (Centrocercus urophasianus) had not been as lucky as this one.


Copyright © Tim Messick 2015. All rights reserved.