Sub-topics include water plantain, grass, palm, duckweed, spiderwort, pineapple, lily, orchid, walnut, beech, elm, mulberry, mistletoe, buckwheat, purslane, waterlily, magnolia, custard-apple, barberry, mustard, pitcher-plant, sundew, plane-tree, rose, legume, oxalis, geranium, spurge, sumac, stafftree, maple, horse chestnut, grape, maple, garcina, violet, loasa, cactus, mangrove, evening primrose, carrot, olive, dogwood, milkweed, morning glory, phlox, vervain (verbena), mint, potato, figwort, bignonia, acanthus, honeysuckle, gourd lobelia, unused and extra composites, algae, and various unsorted slides and slides labeled "To be placed."