Burke: Raphanus raphanistrum

	Raphanus raphanistrum
	jointed charlock, wild radish
Habit	Annual or biennial herb from a small taproot, sparsely pubescent with stiff, pungent hairs, the stems 3-8 dm. tall, freely-branched above.
Leaves	Basal leaves lyrate-pinnatifid, 6-20 cm. long; cauline leaves alternate, several, reduced, all petiolate.
Flowers	Inflorescence of large, often compound, bractless racemes; pedicles ascending, 1-2.5 cm. long; sepals 4, the outer pair saccate at the base; petals 4, usually yellow, often purple tinged or veined, clawed, obovate, 15-20 mm. long; stamens 6.
Fruits	Siliques terete, 4.5-6 cm. long and 3-6 mm. broad, 2-segmented, the lower segment short, not seed-bearing, the upper segment 1-celled, constricted between the seeds, tapering to a beak-like tip 1-2 cm. long.

	Raphanus raphanistrum
Flowering time	May-October
Habitat	Roadsides, fields, ditches, wastelots, and other distrubed, open areas at low elevations.
Distribution	Occurring in scattered locations chiefly west of the Cascades crest in Washington; Alaska to California, east to the Atlantic Coast. [WildflowerSearch map] [BONAP county map]
Origin	Introduced, probably from the Mediterranean region
Conservation status	Not of concern
Sibling taxa	R. sativus
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Raphanus raphanistrum

jointed charlock, wild radish

Habit

Annual or biennial herb from a small taproot, sparsely pubescent with stiff, pungent hairs, the stems 3-8 dm. tall, freely-branched above.

Leaves

Basal leaves lyrate-pinnatifid, 6-20 cm. long;

cauline leaves alternate, several, reduced, all petiolate.

Flowers

Inflorescence of large, often compound, bractless racemes; pedicles ascending, 1-2.5 cm. long;

sepals 4, the outer pair saccate at the base;

petals 4, usually yellow, often purple tinged or veined, clawed, obovate, 15-20 mm. long;

stamens 6.

Fruits

Siliques terete, 4.5-6 cm. long and 3-6 mm. broad, 2-segmented, the lower segment short, not seed-bearing, the upper segment 1-celled, constricted between the seeds, tapering to a beak-like tip 1-2 cm. long.