tarweed

Several million years ago, a California tarweed seed traveled 2,000 miles across the Pacific to Hawaii.

In particular, yellowflower tarweed Holocarpha virgata co-occurred in 95% of survey plots, annual agoseris Agoseris heterophylla in 82%, and bigflower agoseris Agoseris grandiflora in 79%.

We are now conducting studies comparing the belowground growth and development of stinkwort with two other common grassland annual species: yellow starthistle and virgate tarweed (Holocarpha virgata [A.

Bitterbrush communities occurred on the sandy soils of the northern portion of the study area and were dominated by antelope bitterbrush with an understory of annual grasses (primarily cheatgrass) and forbs including western wallflower (Erysimum occidentale) and cluster tarweed (Madia glomerata).

The fires roasted nutritious Tarweed seeds, a fire-resistant plant similar to the sunflower, as well as grasshoppers and caterpillars.

I think my mentor, Jasper (the person I worked for), wanted to show me what it was like to not only jig sacks but also to do it in almost the worst itch wheat there was (only Tarweed would surpass the agony).

honey samples from different flora sources and geographical locations were supplied by the National Honey Board: Tarweed, Blackberry, Cottonseed, Buckwheat and Rabbitbush.

Botanists believe that silverswords (Argyroxiphium sandwicense macrocephalum) evolved here over millions of years from the wind-borne seeds of the tarweed, a California native with sunflower-like blooms.

For example, last year researchers reported genetic evidence that the silversword - a dramatic Hawaiian plant with gray-green, saber-like leaves - evolved from the homely california tarweed, probably borne to Hawaii tens of thousands of years ago as a seed in the features or gut of a bird (SN:4/27/91, p.264).