TROPICAL PLANT CATALOG

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Adenocalymna comosum, Bignonia comosa, Yellow Trumpet Vine

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Adenocalymna comosum, Bignonia comosa
Family: Bignoniaceae
Yellow Trumpet Vine
Origin: South America
Vine or creeperFull sunSemi-shadeRegular waterYellow/orange flowers

The North-east-Brazilian Liana. The euphilic flowers of plants in the family Bignoniaceae display a spectrum of adaptive radiations, involving different pollinator groups. Besides melittophily (adaptation to pollination by medium - to large-sized bees), which predominates, flowers are pollinated by hawkmoths and bats.

Each individual plant had a single inflorescence, which extends above the foliage, in the form of a simple, terminal, vertically orientated, many-flowered raceme on a long, bracteose peduncle. The inflorescence structure, with only one or two flowers open at a given time (in the latter case on the same node), indicates continuous flowering over at least several weeks, thus displaying a ‘steady state’ pattern . The flowers, on a stout pedicel (20 mm long), have a 5-dentate tubular calyx. The calyx, the sub-tending bracts and the two prophylls, bear groups of extra floral nectaries (single peltate trichomes). The yellow-colored corolla, measuring 7 mm in length, has a 28mm long and 4mm-wide basal tube that widens rather abruptly into a campanulate limb.


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