Seed Study - Cirsium undulatum
Cirsium undulatum - Wavy Leaf Thistle NPS Photo Species: Cirsium undulatum Seedling Identification: These seedlings look very similar to Scotch thistle (Onopordum acanthium) seedlings. However the first leaves of wavy leaf are less lobed and have very fine spines off the leaf edges. Cirsium undulatum – wavyleaf thistle Average number of good seeds per gram bulk matter: n.m. Average number of good seeds per gram cleaned: 109 (46) Commercial estimates of seeds per gram: n.a. Percent seed: n.m. Percent live: 67 Collection dates: July 20; August 16; October 6 and 20 Collection effort: 40 grams in 5 person hours Collection notes: Relatively common and easy to collect however it tends to have a lot of insect damage. Cleaning notes: Most appeared to be pure seed however a few might have been buggy or empty. |
Did You Know?
A Rocky Mountain bull elk weighs between 700 - 800 pounds. Rocky Mountain elk were introduced to the park in 1914 and 1916. More...