Riverside Hybrids

 

P. alata, P. x decaisneana, P. phoenicea and P. quadrangularis are often easily confused. See below and also see comparisons here.


Image © 2010 Stephen Gray

Name Mature foliage Flower Ripe fruit
P. alata - quite like P. quadrangularis but smaller flowers. A very variable species. 2-4 petiole glands per stem. Stipules 1-2cm long by 0.3-1cm wide. Single lobed ovate leaves. Flowers 10-12cm wide with neat corona filaments. Sepals and petals red inside & green out. Fruit ovoid, 10-15cm long by 5-10cm wide, bright orange or yellow when ripe.

 




Image © 2012 Martine Sanchez

Name Mature foliage Flower Ripe fruit
P. x decaisneana - (P. alata x P. quadrangularis) often mislabelled and sold as P. quadrangularis. There are probably a number of clones of this cross. 4 glands on 90% of the stems. Stipules 15mm long by 6mm wide. Large ovate leaves. Heavy flowers 10-13cm, corona filaments a bit scruffy at the end compared with alata. Sepals and petals red inside & sepals green out & petals red out. Fruit egg shaped up to 18cm long, dull orange when ripe.

 




Image © 2012 João Franco

Name Mature foliage Flower Ripe fruit
P. phoenicea. A great selection of it by Patrick Worley, P. phoenicea 'Ruby Glow' is widely available in cultivation. Often incorrectly known as P. alata 'Ruby Glow'. 2 bright yellow petiole glands near the leaf make ID easy. Stipules 10-12mm long by 3-4mm wide. Large ovate leaves. Flowers 11-13cm. Petals brick red outside & rich purple inside. Neat corona filaments. Sepals shorter than petals. Fruit large ovate, up to 13cm long & 8cm diameter, yellow when ripe.

 






Image © 2012 Marcel Böhrer Stuttgart Botanical Gardens.

Name Mature foliage Flower Ripe fruit
P. quadrangularis 6 glands on 90% of the leaf stems. Stipules 2-3.5cm long by 1-2cm wide. Large ovate leaves. Flowers 8-12cm. Very scruffy corona filaments, sepals a little paler than petals inside. Fruit quadrangular (four sided), 20-30 cm long by 10-20 cm wide, pale yellow-green when ripe.