PL SC352 Study Guide - Quiz Guide: Portulacaceae, Amaranthus Retroflexus, Ranunculaceae
10 Apr 2018
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Prostrate: plants that form a low-growing mat on the ground: purslane + prostate pigweed. Indeterminate growth: continuously flower and set seed throughout growing season until a killing frost occurs: chickweed and redroot pigweed. Succulent: plants/parts thickened or fleshy, retains water in arid soils. Cyme: determinate inflorescence, central/terminal flowers open before peripheral flowers. Perfect flowers: male + female parts on the same flowers. Monoecious: one house male + female parts in separate flowers (imperfect), both types of flowers occur on same plant. Dioecious: two houses male + female parts in separate flowers (imperfect), both located on different plants. Family amaranthaceae amaranth family: usually annuals, alternate, petioled leaves, apetalous, 3 bracts below each flowers, soft spine at tip of leaves, can cause phytotoxicity. Small, shiny, spatulate spinach leaves, slight indent at tip underside leaves as juvenile. Stems often reddish + fleshy: stem nodes do not reroot, apetalous, monoecious, small green flowers in leaf axils, seeds: flattened shiny black seeds.
