Castilleja minor

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Castilleja minor is a species of flowering plant in the family Orobanchaceae known as thread-torch paintbrush or seep paintbrush. It is native to western North America from British Columbia to California and eastward to the Rocky Mountain states.

Description

Castilleja minor is annual plant that typically grows Script error: No such module "convert". tall, but occasionally may reach as much as Script error: No such module "convert".. It may have a short taproot or small fibrous root system.[1] The stems are usually without branches and sparsely covered in loose, pilose hairs, ones that are long and straight. Each plant will have either just a few stems or one alone.[2] Sometimes the hairs are shaggy and this characteristic is associated with Castilleja minor var. minor.[1]

The leaves of thread-torch paintbrush vary widely in size, from as short as 2 centimeters or as long as 10 cm,[1] and are just 2–5 millimeters wide near the base.[2] They also vary widely in color from purple to green and may have a little or a significant gray cast. They may be linear, narrow like a blade of grass, or lanceolate, shaped like a spear point with the widest part below the midpoint of the leaf.[1] The leaves have a soft texture and are not divided into lobes.[1][2]

The inflorescence is narrow,[3] 5–40 centimeters long and just 1–4 cm wide.[1] The flowers are also, long, narrow, and threadlike.[4]

Taxonomy

Castilleja minor was first scientifically described by Asa Gray as a variety of Castilleja affinis as Castilleja affinis var. minor in 1859. In 1876 he published a revision of his previous classification, changing it to a species with its present name.[5]

Castilleja minor has four accepted varieties.[5] Template:Species list

Names

In English it is known by the common names of thread-torch paintbrush,[4] seep paintbrush,[1] or annual paintbrush.[6] In the early 1900s it was also known as small-flowered painted-cup.[7]

References

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