Parthenium hysterophorus, Capitulum from above. Family Asteraceae, Subclass Asteridae. Origin: Native
Melampodium cinereum, Infructescence. Family Asteraceae, Subclass Asteridae. Origin: Native
Symphyotrichum ericoides, Capitula. Family Asteraceae, Subclass Asteridae. Origin: Native
Silphium radula, long-section. Family Asteraceae, Subclass Asteridae. Origin: Native
Parthenium hysterophorus, Capitulum from side. Family Asteraceae, Subclass Asteridae. Origin: Native
Parthenium hysterophorus, Plant in flower. Family Asteraceae, Subclass Asteridae. Origin: Native
Parthenium argentatum, whole plant. Family Asteraceae, Subclass Asteridae. Origin: Native
Parthenium argentatum, heads. Family Asteraceae, Subclass Asteridae. Origin: Native
Pycnanthemum sp., whole plant. Family Lamiaceae, Subclass Asteridae. Origin: Native
Helenium autumnale , Infructescence. Family Asteraceae, Subclass Asteridae. Origin: Native
Xanthium strumarium, whole plant. Family Asteraceae, Subclass Asteridae. Origin: Native
Hymenoxys grandiflora?, whole plant. Family Asteraceae, Subclass Asteridae. Origin: Native
Helenium flexuosum, Capitulum. Family Asteraceae, Subclass Asteridae. Origin: Native
Symphyotrichum subulatum, Capitula at anthesis; (Aster subulatus) . Family Asteraceae, Subclass Ast...
Silphium radula, whole plant. Family Asteraceae, Subclass Asteridae. Origin: Native
Heterotheca subaxillaris, whole plant. Family Asteraceae, Subclass Asteridae. Origin: Native
Melampodium cinereum, Infructescence. Family Asteraceae, Subclass Asteridae. Origin: Native
Symphyotrichum ericoides, Capitula. Family Asteraceae, Subclass Asteridae. Origin: Native
Silphium radula, long-section. Family Asteraceae, Subclass Asteridae. Origin: Native
Parthenium hysterophorus, Capitulum from side. Family Asteraceae, Subclass Asteridae. Origin: Native
Parthenium hysterophorus, Plant in flower. Family Asteraceae, Subclass Asteridae. Origin: Native
Parthenium argentatum, whole plant. Family Asteraceae, Subclass Asteridae. Origin: Native
Parthenium argentatum, heads. Family Asteraceae, Subclass Asteridae. Origin: Native
Pycnanthemum sp., whole plant. Family Lamiaceae, Subclass Asteridae. Origin: Native
Helenium autumnale , Infructescence. Family Asteraceae, Subclass Asteridae. Origin: Native
Xanthium strumarium, whole plant. Family Asteraceae, Subclass Asteridae. Origin: Native
Hymenoxys grandiflora?, whole plant. Family Asteraceae, Subclass Asteridae. Origin: Native
Helenium flexuosum, Capitulum. Family Asteraceae, Subclass Asteridae. Origin: Native
Symphyotrichum subulatum, Capitula at anthesis; (Aster subulatus) . Family Asteraceae, Subclass Ast...
Silphium radula, whole plant. Family Asteraceae, Subclass Asteridae. Origin: Native
Heterotheca subaxillaris, whole plant. Family Asteraceae, Subclass Asteridae. Origin: Native
Melampodium cinereum, Infructescence. Family Asteraceae, Subclass Asteridae. Origin: Native
Symphyotrichum ericoides, Capitula. Family Asteraceae, Subclass Asteridae. Origin: Native
Silphium radula, long-section. Family Asteraceae, Subclass Asteridae. Origin: Native