Prickly Russian Thistle (Kali tragus). Mountain Springs Summit, Spring Mountains (September 12)

Prickly Russian Thistle (Kali tragus)

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Prickly Russian Thistle (Kali tragus). Mountain Springs Summit, Spring Mountains (September 12)
Prickly Russian Thistle (Kali tragus). Mountain Springs Summit, Spring Mountains (September 12)

Common Names: Prickly Russian Thistle, Common Saltwort, Common Russian Thistle, Leap The Field, Russian Thistle, Tumbleweed, Tumbling Thistle, Wind Witch, Windwitch
Synonyms: Kali tragus, Salsola australis, Salsola iberica, Salsola kali subsp. ruthenica, Salsola kali subsp. tenuifolia, Salsola kali subsp. tragus, Salsola pestifer, Salsola ruthenica
Family: Chenopodiaceae (Goosefoot)
Habit: annual Forb or herb
Size: up to 4 feet
Flowers: pink, white, green
Bloom: midsummer to fall
Leaves: alternate and narrow
Fruit: seed
Description: The young plant is erect, but it grows into a rounded clump of branched, tangled stems The leaves are tipped with spines that in most varieties are so sharp that the plants are best handled with gloves. On the young plant, leaves may be more than 5 cm long, succulent and more or less cylindrical; these juvenile leaves are deciduous and drop off as the plant matures. Flowers are small, pink to greenish flowers develop from the leaf axils. Each flower is subtended by 3, spine-tipped leaves. The leaves of the mature plant are persistent, leathery, broader and shorter than the young leaves (seldom more than 1 cm in length), rigid and spine-tipped. They remain on the stem till the plant dies at the end of the season. The plant becomes woody as the fruits develop. As they ripen, the plant begins to die, dries out and becomes brittle. In that state the base of the stem breaks off easily, particularly in a high wind. The plant then rolls readily before the wind and disperses its seeds as a tumbleweed. As this dead structure tumbles in the wind, it gradually degrades and falls apart, thereby spreading (possibly as many as 200,000) seeds. These seeds draw large numbers of small birds such as sparrows in the late winter and spring.

Distribution: Native to Eurasia, Russian-thistle is distributed throughout most arid and semiarid regions of the world. It is widespread throughout the United States, Canada and Mexico.
Seen: Lake Mead, Jean Dry Lake
Habitat: arid and semi arid areas

Prickly Russian Thistle (Kali tragus). Mountain Springs Summit, Spring Mountains (September 12)
Prickly Russian Thistle (Kali tragus). Mountain Springs Summit, Spring Mountains (September 12)
Prickly Russian Thistle (Kali tragus). Mountain Springs Summit, Spring Mountains (September 12)
Prickly Russian Thistle (Kali tragus). Mountain Springs Summit, Spring Mountains (September 12)
Prickly Russian Thistle with Seeds (Kali tragus). Jean Dry Lake, Nevada (February 12)
Prickly Russian Thistle with Seeds (Kali tragus). Jean Dry Lake, Nevada (February 12)
House Finch (Haemorhous mexicanus) on Prickly Russian Thistle (Kali tragus). Boulder Beach, Lake Mead, Las Vegas (February 3)
House Finch (Haemorhous mexicanus) on Prickly Russian Thistle (Kali tragus). Boulder Beach, Lake Mead, Las Vegas (February 3)
Prickly Russian Thistle with Seeds (Kali tragus). Boulder Beach, Lake Mead, Nevada (February 22)
Prickly Russian Thistle with Seeds (Kali tragus). Boulder Beach, Lake Mead, Nevada (February 22)