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.
Hackelia virginiana, a biennial plant, is commonly known as beggar's lice, sticktight or stickseed. However, the common names beggar's lice and stick-tight are also used for very different plants, such as Desmodium species that are also known as "tick-trefoil".
Comarum palustre, known by the common names purple marshlocks, swamp cinquefoil and marsh cinquefoil, is a common waterside shrub. It has a circumboreal distribution, occurring throughout North America, Europe, and Asia, particularly the northern regions. It is most commonly found on lake shores, marshy riversides and stream margins, often partly submerged with foliage floating. It is a parent of some Fragaria–Comarum hybrids, ornamental plants produced by crossing with strawberries.
Hackelia bella is a species of flowering plant in the borage family known by the common name greater showy stickseed.
Hackelia californica is a species of flowering plant in the borage family known by the common name California stickseed.
Hackelia micrantha is a species of flowering plant in the borage family known by the common names Jessica sticktight and Jessica's stickseed.
Hackelia nervosa is a species of flowering plant in the borage family known by the common name Sierra stickseed. It is native to the mountains of California, especially the Sierra Nevada and its foothills, in areas with some moisture up to near treeline. Its range may extend into Nevada.
Hackelia velutina is a species of flowering plant in the borage family known by the common name velvet stickseed.
Sambucus racemosa is a species of elderberry known by the common names red elderberry and red-berried elder.
Hackelia amethystina is a species of flowering plant in the borage family known by the common name amethyst stickseed.
Hackelia brevicula is a species of flowering plant in the borage family known by the common name Poison Canyon stickseed.
Hackelia cusickii is a species of flowering plant in the borage family known by the common name Cusick's stickseed.
Hackelia setosa is a species of flowering plant in the borage family known by the common name bristly stickseed. It is native to the Klamath Mountains of northern California and southern Oregon, United States, and it is also known from Sierra Valley to the southeast of that range.
Lappula squarrosa is a species of flowering plant in the borage family known by several common names, including European stickseed, bur forget-me-not, bluebur, and bristly sheepbur. It is native to Europe and Asia, where it is common, and it is an introduced species in much of North America and Africa. It is well known as a noxious weed where it is naturalized and also in many parts of its native range. This is an annual herb producing an erect stem often with sprays of many long, bending branches, its form varying in different regions and climates. The plant may approach a meter in height. The stems are lined with linear to oval leaves up to 5 centimeters long and coated in whitish hairs, and the herbage emits a scent generally considered unpleasant. The inflorescence is a long, leafy raceme of tiny flowers near the ends of the branches. Each flower is 2 to 4 millimeters wide with five light blue corolla lobes. White-flowered plants are occasionally seen. The fruit is a cluster of four nutlets which are coated in hooked prickles. The seeds are dispersed when the prickles get caught on animal coats and human clothing, and when they are moved by wind.
Madia glomerata is a species of flowering plant in the family Asteraceae known by the common name mountain tarweed.
Phacelia linearis, the linear-leaved phacelia or threadleaf phacelia, is a species of phacelia.
Senecio sylvaticus is a species of flowering plant in the aster family. It is variously known as the woodland ragwort, heath groundsel, or mountain common groundsel. It is native to Eurasia, and it can be found in other places, including western and eastern sections of North America, as an introduced species and an occasional roadside weed. It grows best in cool, wet areas. It is an annual herb producing a single erect stem up to 80 centimeters tall from a taproot. It is coated in short, curly hairs. The toothed, deeply lobed leaves are up to 12 centimeters long and borne on petioles. They are evenly distributed along the stem. The inflorescence is a wide, spreading array of many flower heads, each lined with green- or black-tipped phyllaries. The heads contain yellow disc florets and most have very tiny yellow ray florets as well.
Thelypodium milleflorum is a species of flowering plant in the mustard family known by the common names manyflower thelypody and many-flowered thelypodium. It is native to western North America, particularly the Great Basin and surrounding plateau, desert, and foothill habitat, where it grows in sagebrush and scrub.
Hackelia cronquistii is a species of flowering plant in the borage family known by the common name Cronquist's stickseed.
Hackelia deflexa is a vascular flowering plant in the borage family known by the common names, northern stickseed, nodding stickseed, and American stickseed
