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Science 25 July 1975:
Vol. 189. no. 4199, pp. 289 - 291
DOI: 10.1126/science.189.4199.289
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Articles

Nectar: Its Production and Functions in Trumpet Creeper

Thomas S. Elias 1 and Hellen Gelband 1

1 Cary Arboretum, New York Botanical Garden, Millbrook, New York 12545

Studies of the trumpet creeper, Campsis radicans (L.) Seem. (Bignoniaceae), reveal five distinct nectary systems, a phenomenon never before reported among temperate zone plants. Ant activity, centered around the four extrafloral systems, clearly demonstrates the ant-guard symbiosis usually associated only with tropical or subtropical species. Floral nectar, an attractant for hummingbird and bumblebee pollinators, differs chemically from the ant-attracting nectar produced extraflorally.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)