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(Last Modified On 11/12/2012)
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(Last Modified On 11/12/2012)
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Family
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CRUCIFERAE
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Contributor
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REED C. ROLLINS
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Description
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Annual, biennial, or perennial herbs; leaves without stipules, alternate, simple or compound, entire to variously lobed or dentate; inflorescence racemose, ebracteate, or the lower flowers subtended by leaf-like bracts; flowers perfect, regular; sepals 4, free, alternating with petals, non-saccate or the outer pair slightly saccate; petals 4, free; stamens usually 6 in two whorls, outer stamens 2, unpaired, usually shorter than paired inner 4; ovary superior, 2-celled with the cells separated by a replum, or rarely 1-celled; style 1, stigma 2-lobed to entire; fruit a silique, dehiscent or rarely indehiscent.
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Note
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The Cruciferae are distributed primarily in the temperate latitudes of both hemispheres. The family is sparsely represented in strictly tropical areas. Panama has but few genera and species. Some weedy members of the family not now known from Panama are to be expected in or near cities or agricultural areas.
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Key
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a. Siliques linear, many times longer than broad, 1 cm. or more in length. b. Siliques dehiscent by valves which open the fruit nearly its entire length. c. Leaves compound; replum margins thickened - ,,-,,,,,-,,,,-,,,,,,,,1. CARDAMINE cc. Leaves simple; replum margins not thickened, d. Petals white, minute, less than 5 mm. long - - .-,,-,,,,-,,2. ROMANSCHULZIA dd. Petals yellow, conspicuous, more than 5 mm. long -,,,,, 3. BRASSICA bb. Siliques without linear valves, jointed and disarticulating near middle -,--------------------------------,--.,--,,,--.,,4. CAKILE aa. Siliques short, usually not-more than 3 times longer than broad, less than 6 mm. long. b. Siliques terete, not notched at apex- - ,...., 5. RORIPPA bb. Siliques strongly flattened at right angles to the narrow replum, notched at apex- -------------------------------------------------6. LEPIDIUM
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