Chilean Rabbitsfoot Grass: Polypogon australis - This may have just been a collection from Wilhelm Suksdorf's garden.
Annual Beardgrass, Annual Rabbitsfoot Grass, Annual Rabbit's-foot Grass, Rabbitfoot Grass: Polypogon monspeliensis (Synonym: Alopecurus monspeliensis)
Beardless Rabbitsfoot Grass, Water Bentfrass: Polypogon viridis (Synonyms: Agrostis semiverticillata, Agrostis verticillata, Agrostis viridis, Polypogon semiverticillatus)