''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 California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

and southern

Oregon Oregon () is a U.S. state, state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington (state), Washington, while the Snake River delineates much of it ...

, United States, and it is also known from

Sierra Valley Sierra Valley is a large mountain valley located west of the crest of California's Sierra Nevada mountain range in Plumas and Sierra Counties, north of Interstate 80. Geography An intermontaine valley at approximately elevation, Sierra Valle ...

to the southeast of that range.

Description

It grows in open and wooded habitat. It is a hairy perennial herb up to about 60 centimeters tall. Most of the leaves are located around the base of the plant, reaching up to 22 centimeters long. Leaves higher on the stem are shorter and narrower. The hairy

inflorescence An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed o ...

is an open array of branches, each a coiling panicle of white-throated blue flowers. The fruit is a cluster of prickly nutlets. It blooms between the months of June and July. It has a stiff pubescence. There are usually 1 to 3 stems, and rarely more stems. The stems are either strigose or densely sericeous. The basal leaves tips are sharply

acute Acute may refer to: Science and technology * Acute angle ** Acute triangle ** Acute, a leaf shape in the glossary of leaf morphology * Acute (medicine), a disease that it is of short duration and of recent onset. ** Acute toxicity, the adverse eff ...

. The cauline leaves tips are either acute or acuminate. The total number of chromosomes in diploid cells in H. setosa is 48. It can be distinguished from H. diffusa by H. setosa's cauline leaves, which tend to be smaller and have more hair than H. diffusa's cauline leaves.

References

External links

Jepson Manual TreatmentPhoto gallery
setosa Flora of California Flora of Oregon {{Boraginoideae-stub