Fauna
Plant

Flower-of-an-hour

Hibiscus trionum

Also known as Bladder Hibiscus, Bladder Ketmia, Venice Mallow, Puarangi

Flower-of-an-hour earned its moniker from fleeting blooms that unfurl in early morning sunshine and collapse by midday. Cream to pale yellow petals showcase a dramatic deep burgundy center surrounding a prominent central stamen column. Following pollination, the calyx inflates into a distinctive paper-like bladder that protects the maturing seeds as they dry.

AnnualFloweringSun-Loving
Flower-of-an-hour reference1 / 7
(c) Tony Rebelo, some rights reserved (CC BY-SA), uploaded by Tony Rebelo · cc-by-sa
—observations
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Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Key facts
Diet & preyAutotrophic (Photosynthesis)
Predators
  • Herbivorous insects
  • Slugs and snails
  • Grazing livestock
ThreatsHerbicide application, intensive cultivation, weeding
HabitatsDisturbed soils, agricultural fields, vacant lots, roadsides
Life span1 year (Annual)
Classification
  1. OrderMalvales
  2. FamilyMalvaceae
  3. GenusHibiscus
  4. SpeciesHibiscus trionum
Range & activity
Range data is not available yet.
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Safe to observe at a normal distance.
Responsible observation
  • Morning Observation: Plan to view flowers early in the day, as petals close tightly by afternoon.
  • Examine the Pods: Check mature stems to inspect the translucent, veined bladder surrounding seed pods.
Related species
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