Cleavers is a weak-stemmed, native annual with very small white flowers. Every Summer I gather Cleavers for our rabbits who consume it with great enthusiasm.
After flowering, a double seed appears:
This closeup shows how the seeds are able to attach themselves to passers-by:
Coralroots are members of the Orchid family and are unusual in that they get their nutrients from decaying organic material. This particular specimen was mowed down by the County road department two days after I took the picture.
Update:
On 4-3-15 while walking through a dense stand of old Doug Firs I came upon this group of 4 Coralroots that had not opened yet.