Campsis spp. Lour. (Bignoniaceae) are commonly known as trumpet vines or trumpetcreepers. The genus contains only two species, C. radicans (L.) Seem. and C. grandiflora K. Schum., and their interspecific hybrid, C. ×tagliabuana (Vis.) Rehder (Huxley et al., 1992). Campsis radicans is native throughout eastern North America and is often seen growing along fencerows, utility lines, and embankments. It is an aggressive woody vine (reaching up to 12 m) that frequently sprouts from the base (Anderson, 1933; Uva et al., 1997). The showy trumpet-shaped flowers form on current year’s growth from mid-June through October. Flower colors of different cultivars include yellow, orange, and red. Campsis grandiflora is also a rapid grower with larger and more open funnel-shaped flowers than C. radicans, which typically has apricot/orange flowers. Campsis ×tagliabuana has intermediate characteristics between the two parental species. Although C. radicans is widely adaptable with a long bloom period and showy display of flowers, it can seed prolifically, grows quickly, and is considered weedy in many areas. The highly infertile, C. ×tagliabuana ‘Chastity’ was developed to minimize the reseeding potential of Campsis while maintaining the desirable landscape characteristics. The average number of seedlings per pollinated flower, an overall measure of female fecundity, was reduced from 119.3 for C. radicans to only 0.008 for ‘Chastity’, a reduction in fertility of 99.993%.
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