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Adenocalymna ( Adenocalymma ) comosum

Yellow Trumpet Vine   Bignoniaceae
 

Yellow Trumpet Vine, Adenocalymna comosum

 
Yellow Trumpet Vine, Adenocalymna comosum

Adenocalymna ( Adenocalymma ) comosum, Bignonia comosa
Family: Bignoniaceae
Yellow Trumpet Vine
Origin: South America
vine or creeper, full sun, semi-shade, regular water, yellow/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 flowersYellow Trumpet Vine, Adenocalymna comosum 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.

Yellow Trumpet Vine is a beautiful creeper with bright yellow trumpet shaped flowers and glossy leaves. Each individual plant had a single inflorescence, which extended 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, 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 subtending bracts and the two prophylls bear groups of extrafloral nectaries (single peltate trichomes) These were foraged by large, blackish ants day and night. The yellow-coloured 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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