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habit
trees
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vines / lianas
herbaceous
grass-like
ferns & allies
cactus-like / succulents
aquatic & OBL wetland species
special groups
arums
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milkweeds
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longevity
annual or biennial
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armature
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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
USDA Plants
Species Count: 2296
Acanthaceae
Acoraceae
Alismataceae
Amaranthaceae
Amaryllidaceae
Anacardiaceae
Apiaceae
Apocynaceae
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Araceae
Araliaceae
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Cactaceae
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Cistaceae
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Colchicaceae
Commelinaceae
Convolvulaceae
Cornaceae
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Cucurbitaceae
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Cyperaceae
Cystopteridaceae
Dennstaedtiaceae
Dioscoreaceae
Droseraceae
Dryopteridaceae
Elaeagnaceae
Elatinaceae
Equisetaceae
Ericaceae
Eriocaulaceae
Euphorbiaceae
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Gentianaceae
Geraniaceae
Grimmiaceae
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Haloragaceae
Hamamelidaceae
Hydrangeaceae
Hydrocharitaceae
Hypericaceae
Hypoxidaceae
Iridaceae
Isoetaceae
Juglandaceae
Juncaceae
Juncaginaceae
Lamiaceae
Lentibulariaceae
Liliaceae
Limnanthaceae
Linaceae
Linderniaceae
Lycopodiaceae
Lythraceae
Malvaceae
Marsileaceae
Martyniaceae
Melanthiaceae
Menispermaceae
Menyanthaceae
Molluginaceae
Montiaceae
Moraceae
Myricaceae
Nartheciaceae
Nelumbonaceae
Nyctaginaceae
Nymphaeaceae
Oleaceae
Onagraceae
Onocleaceae
Ophioglossaceae
Orchidaceae
Orobanchaceae
Osmundaceae
Oxalidaceae
Papaveraceae
Penthoraceae
Phrymaceae
Phytolaccaceae
Pinaceae
Plantaginaceae
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Podostemaceae
Polemoniaceae
Polygalaceae
Polygonaceae
Polypodiaceae
Pontederiaceae
Portulacaceae
Potamogetonaceae
Primulaceae
Pteridaceae
Ranunculaceae
Rhamnaceae
Rosaceae
Rubiaceae
Ruppiaceae
Rutaceae
Salicaceae
Salviniaceae
Santalaceae
Sapindaceae
Sarraceniaceae
Saxifragaceae
Scheuchzeriaceae
Schistostegaceae
Scrophulariaceae
Selaginellaceae
Smilacaceae
Solanaceae
Sphagnaceae
Staphyleaceae
Taxaceae
Thelypteridaceae
Thymelaeaceae
Tofieldiaceae
Typhaceae
Ulmaceae
Urticaceae
Verbenaceae
Viburnaceae
Violaceae
Vitaceae
Woodsiaceae
Xyridaceae
Zygophyllaceae