Definition of "sourgrass" []

• Sorrel (noun)
• A species of crabgrass, Digitaria insularis (noun)

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• "It's easy to talk about courage when you're sitting at the table, sharing a bottle of sourgrass ale with your husband; it's something else again when you find yourself the target of an armored hovercraft loaded with enough rockets to take out a small town."
• "Raising his hand, he brought his people to a halt, then crouched low and peered through the sourgrass."
• "At first he didn't see anything -- sourgrass as high as his chest, spider bush snarled along the edge of the water, a few trees in the background -- and then something moved, and he saw a boid looking straight at him."