Holding bin (plant) field index
This field is meant to represent the best ID complex when a plant ID spans multiple taxa. (IE: you know the plant is one of two or three species in a genus, but don't want to identify it only to genus, grouping it with many others). As with my other similar journal entries, i will gradually fill this journal entry with possible entries and links, until iNat has functionality to search and query from existing values.
Caulophyllum thalctroides/gigantea - they intergrade and aren't good species but somehow got split. Anyone surprised?
Lonicera morrowii/tatarica
Parthenocissus quinquefolia/inserta - can't really tell these two apart without tendril cups, or at least I can't.
Pinus ponderosa/jeffreyi - without cones these are difficult/impossible to tell apart in parts of California
Solidago altissima/canadensis - may want to add gigantea too, is the glaucous stem visible all of the growing season?
Polypodium virginianum/appalachianum
Carex vesicariae group - there are several Carex groups between genus and species that haven't been added to iNat, for now I am adding this one which I use often, in the future we may wish to add them more formally to the taxonomy.
Toxicodendron radicans/rydbergii
http://www.inaturalist.org/observation_fields/7184
(see also, for spiders: http://www.inaturalist.org/journal/arachnojoe/11424-about-the-field-holding-bin-spider)