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Achillea millefolium (Yarrow)
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Adenostema fasciculatum (Chamise)
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Adenostema sparsifolium (Red shanks)
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Agoseris grandiflora (Mountain dandelion)
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Allium haematochiton (Red-skinned onion)
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Allium peninsulare (Peninsular onion)
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Ambrosia psilostachya (Western ragweed)
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Amsinckia menziesii (Fiddleneck)
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Anagallis arvensis* (Scarlet pimpernel)
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Anthemis cotula* (Mayweed)
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Anthriscus caucalis (Bur-chervil)
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Antirrhinum coulterianum (White snapdragon)
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Antirrhinum kelloggii (Twining snapdragon)
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Antirrhinum multiflorum (Rose snapdragon)
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Antirrhinum nuttallianum (Violet snapdragon)
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Apiastrum angustifolium (Wild celery)
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Arctostaphylos glandulosa (Eastwood manzanita)
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Arctostaphylos glauca (Bigberry manzanita)
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Argemone munita (Prickly poppy)
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Artemisia californica (California sagebrush)
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Artemisia douglasiana (Mugwort)
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Asclepias californica (California milkweed)
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Astragalus trichopodus (Southern California locoweed)
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