''Streptanthus hyacinthoides'' is a species of flowering plant in the

mustard family Brassicaceae () or (the older) Cruciferae () is a medium-sized and economically important family of flowering plants commonly known as the mustards, the crucifers, or the cabbage family. Most are herbaceous plants, while some are shrubs. The le ...

known by the common name smooth jewelflower. It is found in Texas, Arkansas, Oklahoma, Louisiana and Nebraska, occurring in prairies, grasslands, and roadsides. The

specific name Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * Specific name (botany), the two-part (bino ...

''hyacinthoides'' is Greek, referring to the resemblance of the species to the genus ''

Hyacinthus ''Hyacinthus'' is a small genus of bulbous, spring-blooming perennials. They are fragrant flowering plants in the family Asparagaceae, subfamily Scilloideae and are commonly called hyacinths (). The genus is native to the area of the eastern M ...

'', and the common name "smooth jewelflower" refers to the glabrous stems of the plant.

Description

''Streptanthus hyacinthoides'' is an annual herb, growing as high as . The

sessile Sessility, or sessile, may refer to: * Sessility (motility), organisms which are not able to move about * Sessility (botany), flowers or leaves that grow directly from the stem or peduncle of a plant * Sessility (medicine), tumors and polyps that ...

or nearly sessile leaves are

linear Linearity is the property of a mathematical relationship (''function'') that can be graphically represented as a straight line. Linearity is closely related to '' proportionality''. Examples in physics include rectilinear motion, the linear r ...

lanceolate The following is a list of terms which are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (a single leaf blade or lamina) or compound (with several leaflets). The edge of the leaf may be regular o ...

. The leaves are typically cauline and measure long to wide. The actinomorphic flowers are clustered in crowded

raceme A raceme ( or ) or racemoid is an unbranched, indeterminate type of inflorescence bearing flowers having short floral stalks along the shoots that bear the flowers. The oldest flowers grow close to the base and new flowers are produced as the s ...

s. The flowers are wide with long

pedicel Pedicle or pedicel may refer to: Human anatomy *Pedicle of vertebral arch, the segment between the transverse process and the vertebral body, and is often used as a radiographic marker and entry point in vertebroplasty and kyphoplasty procedures ...

s. The

sepal A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 The term ''sepalum'' was coined b ...

s are purple and the four petals of each flower are purple or white with purple veins. The ovoid seeds are about long and wide.

References

Streptanthus Plants described in 1836 {{Brassicales-stub