Not Mill. 1754.]

Annual or biennial, diffuse, unpleasantly odorous herbs, with mostly pinnatifid leaves, and small whitish flowers. Pubescence of simple hairs. Silicles small, didymous, laterally compressed, sessile. Stamens often only 2 or 4. Valves of the capsule oblong or subglobose, obtuse at each end, rugose or tuberculate, indehiscent, falling away from the septum at maturity. Seeds 1 in each cell; cotyledons narrow, incumbent. [Ancient Italian name.]

About 6 species, of wide geographic distribution in warm and temperate regions. Type species: Carara Coronopus (L.) Medic.

Pod rugose, not crested, emarginate.

1.

C. didymus.

Pod coarsely wrinkled, crested, tuberculate.

2.

C. Coronopus.

1. Carara Didyma (L.) Britton. Lesser Wart-Cress

Fig. 2043

Lepidium didymum L. Mant. 92. 1767.

Senebiera didyma Pers. Syn. 2: 185. 1807.

Coronopus didymus J. E. Smith, Fl. Brit. 3: 691. 1800.

Tufted, spreading on the ground, sparingly pubescent. Stems 2'-15' long, branching; leaves deeply 1-2-pinnatifid, the lower slender-petioled, the upper sessile; flowers minute, white, racemose; pedicels slender, 1"-1 1/2" long in fruit; pod didy-mous, about 1" broad and slightly more than i" high; valves rugose, obtuse at each end and readily separating into 2 ovoid nutlets.

In waste places, Newfoundland to Florida, Missouri and Texas, west to British Columbia, California. Abundant in ballast about the northern seaports. Also throughout tropical America and widely distributed in the Old World where it is native. Summer.

1 Carara Didyma L Britton Lesser Wart Cress 3851 Carara Didyma L Britton Lesser Wart Cress 386

2. Carara Corónopus (L.) Medic. Wart Or Swine's Cress. Wartwort

Fig. 2044

Cochlcaria Coronopus L. Sp. Pl. 648. 1753.

Carara Coronopus Medic. Pflg. 1: 35. 1792.

Senebiera Coronopus Poir. in Lam. Encycl. 7: 76. 1806.

Coronopus Coronopus Karst. Deutsch. Fl. 673. 1880-83.

Tufted, spreading on the ground, succulent, glabrous and glaucous, or with a few spreading hairs. Stems 2'-15' long; leaves similar to those of the last species, generally larger, sometimes less divided; flowers similar; pedicels stout, 1" long or less; pod 2" broad and about 1 1/2" high, flattish, rounded, apiculate at the summit, marked with coarse wrinkles which form a crest around the margin; valves not distinctly separate.

In waste places and on ballast, New Brunswick to Florida and the Gulf States. Fugitive or adventive from Europe. Sometimes called buck's-horn and herb-ivy. Sow-grass. Summer.