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Plant
habit
trees
shrubs
vines / lianas
herbaceous
ferns & allies
grass-like
cactus-like / succulents
aquatic & OBL wetland species
special groups
arums
composites
legumes
milkweeds
mints
orchids
spurges
dicots
monocots
longevity
annual or biennial
perennial
armature
unarmed
armed
leaves/twigs aromatic when crushed
without marked odor
clearly odiferous
Leaves
arrangement/phyllotaxy
basal
alternate
opposite
whorled
fascicled/clustered along stem
blade division
all simple
deeply lobed or divided
some or all fully compound
Flower
ovaries/pistils per flower
1
2-5
more than 5
Fruit or Cone
fruit consistency at maturity
dry/leathery
fleshy
Larry Allain, USGS
Species Count: 508
Acanthaceae
Adoxaceae
Alismataceae
Altingiaceae
Amaranthaceae
Amaryllidaceae
Anacardiaceae
Annonaceae
Apiaceae
Apocynaceae
Aquifoliaceae
Araceae
Araliaceae
Arecaceae
Asparagaceae
Aspleniaceae
Asteraceae
Berberidaceae
Betulaceae
Bignoniaceae
Boraginaceae
Brassicaceae
Bromeliaceae
Campanulaceae
Cannabaceae
Caprifoliaceae
Caryophyllaceae
Celastraceae
Cistaceae
Commelinaceae
Convolvulaceae
Cornaceae
Cucurbitaceae
Cupressaceae
Cyperaceae
Dennstaedtiaceae
Droseraceae
Dryopteridaceae
Ebenaceae
Ericaceae
Euphorbiaceae
Fabaceae
Fagaceae
Gentianaceae
Geraniaceae
Hydrocharitaceae
Hydroleaceae
Hypericaceae
Iridaceae
Juglandaceae
Juncaceae
Lamiaceae
Lauraceae
Linaceae
Lythraceae
Malvaceae
Melastomataceae
Meliaceae
Menispermaceae
Molluginaceae
Montiaceae
Moraceae
Myricaceae
Nelumbonaceae
Nymphaeaceae
Oleaceae
Onagraceae
Onocleaceae
Ophioglossaceae
Orchidaceae
Orobanchaceae
Oxalidaceae
Passifloraceae
Penthoraceae
Phytolaccaceae
Pinaceae
Plantaginaceae
Platanaceae
Poaceae
Polemoniaceae
Polygalaceae
Polygonaceae
Polypodiaceae
Pontederiaceae
Primulaceae
Ranunculaceae
Rhamnaceae
Rosaceae
Rubiaceae
Rutaceae
Salicaceae
Salviniaceae
Santalaceae
Sapindaceae
Sapotaceae
Saururaceae
Scrophulariaceae
Smilacaceae
Solanaceae
Styracaceae
Symplocaceae
Tetrachondraceae
Typhaceae
Ulmaceae
Urticaceae
Verbenaceae
Violaceae
Vitaceae
Woodsiaceae