Species
54 species are currently accepted: * '' Hackelia amethystina'' - amethyst stickseed – California * '' Hackelia andicola'' – Peru * '' Hackelia bella'' - greater showy stickseed – northwestern California and southwestern Oregon * '' Hackelia besseyi'' - Bessey's stickseed – Arizona, Colorado, New Mexico and Texas * '' Hackelia bhutanica'' – eastern Nepal to northwestern Arunachal Pradesh * '' Hackelia brachytuba'' – Nepal to central China * '' Hackelia brevicula'' - Poison Canyon stickseed – eastern California * '' Hackelia californica'' - California stickseed – northern California and west-central Oregon * '' Hackelia ciliata'' - British Columbia, Idaho, and Washington * '' Hackelia cinerea'' - gray stickseed – Washington, Idaho, and Montana * '' Hackelia cronquistii'' - Cronquist's stickseed – Oregon and Idaho * '' Hackelia cusickii'' - Cusick's stickseed – Oregon, northern California, and northwestern Nevada * '' Hackelia davisii'' – Idaho * '' Hackelia deflexa'' – northern Eurasia and northern North America * '' Hackelia difformis'' – south-central China and Tibet * '' Hackelia diffusa'' - Spreading stickseed – British Columbia, Washington, Oregon * '' Hackelia floribunda'' - manyflower stickseed – western and central Canada and United States * '' Hackelia gracilenta'' – Colorado * '' Hackelia heliocarpa'' – Mexico (Chihuahua) * '' Hackelia hendersonii'' – Washington, Oregon, and Montana * '' Hackelia hintoniorum'' – Mexico (Oaxaca) * '' Hackelia hirsuta'' – New Mexico * '' Hackelia hispida'' - showy stickseed – Washington, Oregon, Idaho * '' Hackelia ibapensis'' – Utah * '' Hackelia latifolia'' – eastern Australia and Tasmania * '' Hackelia leonotis'' – northeastern and central Mexico * '' Hackelia macrophylla'' – northern Pakistan and western Himalaya * '' Hackelia meeboldii'' – western Himalaya * '' Hackelia mexicana'' – Mexico to Venezuela and Peru * '' Hackelia micrantha'' - Jessica sticktight – western Canada and United States * '' Hackelia mundula'' - pink stickseed – southwestern Oregon to central California * '' Hackelia murgabica'' – Tajikistan * '' Hackelia nervosa'' - Sierra stickseed – California and northwestern Nevada * '' Hackelia obtusifolia'' – Bhutan * '' Hackelia ophiobia'' – southeastern Oregon, southwestern Idaho, and northern Nevada * '' Hackelia parviflora'' – Peru (Junín) * '' Hackelia patens'' - spotted stickseed – west-central United States * '' Hackelia pinetorum'' – Arizona, New Mexico, Texas, and northern Mexico * '' Hackelia popovii'' – Tajikistan * '' Hackelia rattanii'' – Mexico (Baja California) * '' Hackelia revoluta'' – Colombia to northwestern Argentina * '' Hackelia sessilifructa'' – Xinjiang * '' Hackelia setosa'' - bristly stickseed – northern California and southwestern Oregon * '' Hackelia sharsmithii'' - Sharsmith's stickseed – central California and central Nevada * '' Hackelia skutchii'' – Guatemala and Costa Rica * '' Hackelia stewartii'' – northern Pakistan and western Himalaya * '' Hackelia stricta'' – southwestern Mexico to Veracruz * '' Hackelia suaveolens'' – eastern and southern Australia and Tasmania * '' Hackelia taylorii'' – Washington * '' Hackelia uncinata'' – northeastern Pakistan to Himalaya and southern China * '' Hackelia ursina'' – southeastern Arizona, southwestern New Mexico, and northern Mexico (Sonora) * '' Hackelia velutina'' - velvet stickseed – north-central and central California and northwestern Nevada * '' Hackelia venusta'' - lesser showy stickseed – central Washington * '' Hackelia virginiana'' - beggar's lice – central and eastern United States and eastern CanadaReferences
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