Bob, Gib and others, do you remember in the early 80's when that green was surrounded by pampasgrass? I was playing there with a good friend who hit it into the pampas left of the green, it lodged about 3 1/2 feet above the ground. He says, "I can hit it!" Four baseball swings later the ball is never to be seen again, buried in the base. He walks off the green in disgust saying, "If I was the superintendent here the first thing I would do is get rid of every last piece of that stuff!" (he actually used words that are unprintable here).
What do you know, 2 years later he gets the job! Calls me up for a round the first week. When we get to four green, after removing the flowers, he's got 3 men with weedeaters fitted with blades cutting it down to the dirt. Pamapas is flying everywhere, he turned to me and gave me a sly smile. True story.
As an aside, pamapasgrass is the number one weed problem in California. Each feathery flower can have 100,000 seeds, most mature plants have have up to 10 flower stalks, potentially 1,000,000 new plants from each parent!
Ice plant is a close 2nd. At the Fort Ord base they use the "burrito method" of removal. Several people start on one side and roll up the mat just like a burrito! Very difficult to control chemically because of the waxy surface. It is also dirty, collecting in it's fingers anything that passes by. Cups, papers, etc.