Hackelia (stickseeds) is a genus of plants in the borage family, Boraginaceae. It includes 54 species found in North America, western South America, temperate Eurasia, and Australia. 12 species are native to California.Calflora Database: Hackelia species index in California. Calflora. Retrieved 17 June 2023.
The genus was named after Josef Hackel, a Czech botanist. The common name, stickseed, refers to the tendency of the barbed nutlets to stick to animal fur.
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 torva – Australia 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 Canada
References
External links USDA Plants Profile Calflora Database: Hackelia species index in California Jepson Manual eFlora (TJM2) treatment of Hackelia in California