Bidens aristosa

Leaves 5-, 7-, and 9-parted.

Seeds ripen uniformily in the center of head and are easily brushed into a collecting bag.

Information is for genus Bidens: Animals that eat its seeds: Wood duck, Purple finch. Animals that eat its foliage: Cottontail rabbit (Martin et al. 1951) Charles Robertson, 1928: (Bees collect pollen or suck nectar; beetles usually feed on pollen & are non-pollinating; some Syrphid flies feed on pollen & are non-pollinating, while others suck nectar; other insects suck nectar; observations are from Robertson) Bees (long-tongued) Apidae (Apinae): Apis mellifera; Apidae (Bombini): Bombus auricomus, Bombus fraternus, Bombus griseocallis fq, Bombus impatiens fq, Bombus pensylvanica fq, Psithyrus variabilis; Anthophoridae (Ceratinini): Ceratina dupla dupla; Anthophoridae (Epeolini): Epeolus autumnalis, Epeolus bifasciatus, Epeolus coreopsis, Epeolus pusillus fq, Triepeolus concavus, Triepeolus cressonii cressonii fq, Triepeolus donatus, Triepeolus lunatus concolor, Triepeolus lunatus lunatus, Triepeolus pectoralis, Triepeolus remigatus; Anthophoridae (Eucerini): Melissodes agilis fq, Melissodes bimaculata bimaculata, Melissodes boltoniae fq, Melissodes dentiventris, Melissodes nivea, Melissodes rustica, Melissodes trinodis fq, Svastra atripes atripes, Svastra obliqua obliqua; Anthophoridae (Nomadini): Nomada vicina vicina, Nomada vincta; Megachilidae (Coelioxini): Coelioxys octodentata, Coelioxys sayi; Megachilidae (Megachilini): Megachile brevis brevis fq, Megachile mendica, Megachile petulans; Megachilidae (Trypetini): Heriades leavitti, Heriades variolosa variolosa Bees (short-tongued) Halictidae (Dufoureinae): Dufourea marginatus; Halictidae (Halictinae): Agapostemon sericea, Agapostemon virescens, Augochlora purus, Augochloropsis metallica metallica, Halictus ligatus, Lasioglossum coriaceus, Lasioglossum pruinosus; Colletidae (Colletinae): Colletes compactus fq, Colletes eulophi, Colletes simulans armata; Andrenidae (Andreninae): Andrena accepta, Andrena aliciae, Andrena helianthi; Andrenidae (Panurginae): Calliopsis andreniformis, Calliopsis coloradensis, Heterosarus compositarum, Heterosarus labrosiformis labrosiformis, Heterosarus rudbeckiae fq, Heterosarus solidaginis, Perdita octomaculatus fq, Pseudopanurgus rugosus Wasps Sphecidae (Bembicinae): Bembix americana, Bembix nubilipennis, Bicyrtes quadrifasciata, Bicyrtes ventralis, Pseudoplisus divisus; Sphecidae (Philanthinae): Cerceris prominens, Eucerceris fulvipes; Sphecidae (Sphecinae): Ammophila nigricans, Eremnophila aureonotata, Sceliphron caementaria; Vespidae: Vespula germanica; Vespidae (Eumeninae): Ancistrocerus adiabatus, Stenodynerus histrionalis; Tiphiidae: Myzinum quinquecincta; Scoliidae: Scolia bicincta; Ichneumonidae: Ceratogastra ornata, Exetastes suaveolens fq; Braconidae: Agathis longipalpus Flies Syrphidae: Eristalis dimidiatus fq, Eristalis stipator, Eristalis transversus, Eupeodes americanus fp np, Milesia virginiensis, Orthonevra nitida fp np, Palpada vinetorum, Toxomerus politus fp np; Bombyliidae: Exoprosopa decora, Exoprosopa fasciata fq, Exoprosopa fascipennis fq, Lepidophora lepidocera, Poeciloanthrax alcyon, Sparnopolius confusus fq, Systropus macer, Toxophora amphitea; Conopidae: Physocephala texana, Robertsonomyia palpalis, Zodion fulvifrons; Tachinidae: Acroglossa hesperidarum, Archytas aterrima, Cylindromyia euchenor, Estheria abdominalis, Leskiomima secunda, Periscepsia laevigata, Plagiomima spinosula fq, Scotiptera parvicornis fq, Tachinomyia panaetius fq; Sarcophagidae: Sphixapata trilineata; Calliphoridae: Cochliomyia macellaria, Lucilia caesar, Lucilia sericata; Anthomyiidae: Delia platura, Leucophora siphonina Butterflies Nymphalidae: Danaus plexippes, Limenitis archippus, Limenitis arthemis astyanax, Phyciodes tharos, Speyeria cybele, Vanessa cardui fq; Pieridae: Colias philodice, Nathalis iole, Pieris rapae; Papilionidae: Battus philenor, Papilio polyxenes asterias Skippers Hesperiidae: Epargyreus clarus, Erynnis juvenalis, Polites themistocles Moths Noctuidae: Helicoverpa zea Beetles Cantharidae: Chauliognathus pennsylvanicus fq sn; Chrysomelidae: Calligrapha bidenticola, Diabrotica undecimpunctata; Curculionidae (Rhynchophorinae): Rhodobaenus tredecimpunctatus; Meloidae: Epicauta cinereus, Epicauta pensylvanica Plant Bugs Pentatomidae: Euschistus variolaria

Members of this genus are called "fourchette" by south Louisiana Acadians (Holmes 1990). The common name beggars-ticks comes from its seeds that readily attach themselves to clothes by two barbed awns. The barbed awns on the seeds of some Bidens species are said to work their way into the hides of fur bearing animals reducing the value of their pelts. This species is found in marshes, meadows, and ditches.

Marshes, meadows, and ditches.