Figure 172c - Nymphoides aquatica (digital photographs taken by Nathan Howell; illustration from Britton and Brown 1913) Leaf (abaxial surface
Figure 104c - Alternanthera philoxeroides (digital photographs taken by Nathan Howell [habi...
Figure 173c - Morella cerifera (digital photographs taken by Nathan Howell; illustration fr...
Figure 92c - Sacciolepis striata (digital photographs taken by Nathan Howell; illustration ...
Figure 172d - Nymphoides aquatica (digital photographs taken by Nathan Howell; illustration...
Figure 172a - Nymphoides aquatica (digital photographs taken by Nathan Howell; illustration...
Figure 177d - Nyssa aquatica (digital photographs taken by Nathan Howell [leaves, fruits] a...
Figure 177e - Nyssa aquatica (digital photographs taken by Nathan Howell [leaves, fruits] a...
Figure 178e - Nyssa biflora (digital photographs taken by Nathan Howell [leaves, fruits] an...
Figure 156d - Persea palustris (digital photographs taken by Nathan Howell; illustration fr...
Figure 118c - Euthamia caroliniana (digital photographs taken by Nathan Howell [capitulesce...
Figure 176d - Nymphaea odorata var. odorata (digital photographs taken by Nathan Howell; il...
Figure 118d - Euthamia caroliniana (digital photographs taken by Nathan Howell [capitulesce...
Figure 210d - Hydrocotyle verticillata (digital photographs taken by Alexander Krings) ...
Figure 210c - Hydrocotyle verticillata (digital photographs taken by Alexander Krings) ...
Figure 162c - Utricularia subulata (digital photographs taken by Nathan Howell [habit, flow...
Figure 104c - Alternanthera philoxeroides (digital photographs taken by Nathan Howell [habi...
Figure 173c - Morella cerifera (digital photographs taken by Nathan Howell; illustration fr...
Figure 92c - Sacciolepis striata (digital photographs taken by Nathan Howell; illustration ...
Figure 172d - Nymphoides aquatica (digital photographs taken by Nathan Howell; illustration...
Figure 172a - Nymphoides aquatica (digital photographs taken by Nathan Howell; illustration...
Figure 177d - Nyssa aquatica (digital photographs taken by Nathan Howell [leaves, fruits] a...
Figure 177e - Nyssa aquatica (digital photographs taken by Nathan Howell [leaves, fruits] a...
Figure 178e - Nyssa biflora (digital photographs taken by Nathan Howell [leaves, fruits] an...
Figure 156d - Persea palustris (digital photographs taken by Nathan Howell; illustration fr...
Figure 118c - Euthamia caroliniana (digital photographs taken by Nathan Howell [capitulesce...
Figure 176d - Nymphaea odorata var. odorata (digital photographs taken by Nathan Howell; il...
Figure 118d - Euthamia caroliniana (digital photographs taken by Nathan Howell [capitulesce...
Figure 210d - Hydrocotyle verticillata (digital photographs taken by Alexander Krings) ...
Figure 210c - Hydrocotyle verticillata (digital photographs taken by Alexander Krings) ...
Figure 162c - Utricularia subulata (digital photographs taken by Nathan Howell [habit, flow...
Figure 104c - Alternanthera philoxeroides (digital photographs taken by Nathan Howell [habi...
Figure 173c - Morella cerifera (digital photographs taken by Nathan Howell; illustration fr...
Figure 92c - Sacciolepis striata (digital photographs taken by Nathan Howell; illustration ...