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Project Name Data (Last Modified On 11/27/2012)

Flora Data (Last Modified On 11/27/2012)
PlaceOfPublication Sp. P1. 375. 1753.
Synonym Parkinsonia Thornberi M. E. Jones, Contr. West. Bot. 12:12. 1908, fide I. M. Johnston.
Description Xerophytic shrubs or small trees to several m. tall, the branchlets subglabrous, more or less flexuous and gnarled. Leaves multifoliolate, twice compound as de- scribed for the genus; petiole and rachis modified into a spine 5-15 mm. long, bearing from the upper side 1-3 pairs of pinnae; pinnae multifoliolate, the rachis linear, 2-3 din. long and 1-2 mm. wide, flattened, green; ultimate leaflets about 25 pairs, linear-oblong, 2-8 mm. long and up to 2 mm. wide, often caducous. Racemes up to 2 dm. long, subglabrous; bracts lanceolate, about 1 mm. long; pedicels slender, 1-2 cm. long in age. Flowers yellow; calyx-tube turbinate, scarcely 2 mm. long; calyx-lobes ovate-lanceolate, 6-7 mm. long and about 3 mm. wide, subglabrous; petals 5, about 13 mm. long, the blade suborbicular. about 8 mm. long, claw pubescent at base, about 5 mm. long; stamens 8-9 mm. long, pubescent basally; ovary linear-oblong, about 4 mm. long, hispid; style linear, about equalling the stamens, glabrous; stigma terminal, minute. Legume linear, up to about 15 cm. long, nodose by constriction between the seeds, glabrous, striate-nerved; seeds about 1 cm. long.
Habit shrub tree
Distribution Found escaped or planted in the Americas from southern United States to Argentina and West Indies; from uncertain (American: Mexican?) origin
Note The species has been reported from Panama, although no specimens collected there have yet come to our attention.
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