NAZ Flora: A Photographic, Annotated Catalog of Northern Arizona Vascular Plants. Photo shows Lomatium foeniculaceum var. macdougalii (MacDougal's Biscuitroot). Click here to return to home page.

Asclepias subverticillata

Poison Milkweed; Horsetail Milkweed

A member of the Asclepiadaceae, the Milkweed Family

Inflorescence detail of Asclepias subverticillata, with ants, Grand Canyon National Park.

Inflorescence detail, with ants.
Grand Canyon National Park: At edge of parking lot at
Backcountry Information Center, South Rim.

7 July 2002.

 

Habit of Asclepias subverticillata, Flagstaff.

Habit, in bloom.
Flagstaff: Along Gemini Drive in front of
U.S. Geological Survey offices, near Buffalo Park.

10 July 2002.

 

Fruiting stems of Asclepias subverticillata, Grand Canyon.

Fruiting stems.
Grand Canyon National Park: Grand Canyon Village, near El Tovar bus stop.

25 August 2002.

 

Seeds dispersing from pods of Asclepias subverticillata, Grand Canyon.

Dispersing seeds.
Different plant, same location as prior image.

25 August 2002.


Photographs copyright © Lee Dittmann

This page last updated 26 May 2008.

Northern Arizona Flora
Ferns and Fern Allies Gymnosperms Angiosperms: Dicots Angiosperms: Monocots
Introduction Contributors Glossary References
A work in progress published by Mindbird Maps & Books.
You can help support the development and maintenance of NAZ Flora by purchases from www.mindbird.com, the Mindbird Maps & Books retail website.
See the selection of hand lenses, field guides and floras, maps, waterproof notebooks and much more of interest to the nature lover or biological sciences professional.