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  Arachnothryx leucophylla Planchon
  Family Name : Rubiaceae

  Synonyms : Rondeletia dubia, Rondeletia yucatanensis, Rondeletia elongata, Bouvardia discolor, Rondeletia leptodictya, Arachnothryx yucatanensis, Arachnothryx leptodictya, Arachnothryx elongata, Hedyotis leucophylla, Rondeletia leucophylla

  Common Names : Bush Pentas, Panama Rose, Rondeletia

 
Bush Pentas,Panama Rose,Rondeletia
  • Record Info
    • Featured in '1001 Garden Plants in Singapore' Book (2ed) :
      True
  • Life Stage & Characteristics
    • Plant Division :
      Angiosperms (Flowering Seed Plants) (Dicotyledon)
      Plant Growth Form :
      Shrub
      Lifespan (in Singapore) :
      Perennial
      Mode of Nutrition :
      Autotrophic
      Maximum Height :
      1.5 m to 6 m
  • Biogeography
    • Native Distribution :
      Mexico to Panama
      Native Habitat :
      Terrestrial
      Preferred Climate Zone :
      Tropical
      Local Conservation Status :
      Exotic
  • Description & Ethnobotany
    • Plant Morphology :
      Growth Form: Woody evergreen shrub with a round shape, typically growing up to 1 - 3 m tall in cultivation but can reach 6 m in the wild.
      Foliage: Opposite leaves are lanceolate to narrowly ovate (10 - 12 cm long, 2 cm wide). Leaves are sessile (the leaf blade is attached to the stem without an intervening stalk). The upper leaf surface is dark green and hairless, while the lower side is whitish and pubescent (covered in short, white hairs). A forked flap of tissue known as a stipule occurs between the pair of leaves found at each point along the stem.
      Stems: Woody stem has dark brown, shallowly fissured bark. Young stem is tomentose (covered in soft, short hairs). 
      Flowers: Salverform flowers are tubular with 4 bright pink lobes arranged in the shape of a cross (2 cm long, 1 cm wide). They are arranged in rounded clusters known as cymose inflorescences (5 cm wide). Flowers are most fragrant after sunset.
      Fruits: Fruits are small, dry and indehiscent, contain many seeds. They are whitish and covered in soft hairs.
      Cultivation :
      This species will flower best in full sun or light shade, because deep shade will inhibit flowering and result in leggy plants. Individuals should be spaced 3 - 3.5 m apart. Mulch the plants with compost to prevent the soil from drying out or the roots from overheating. Feed plants with a fertilizer rich in phosphorous to promote flowering. Avoid using nitrogen rich fertilizers, because they encourage development of leaves rather than flowers. Try not to prune this species frequently, because flowers are produced from the new growth.
      Etymology :
      The specific epithet "leucophylla" is Latin for white leaf ("leuco" meaning white and "phylla" meaning leaf). The name may be a reference to the pubescent leaves which have short, white hairs.
      Ethnobotanical Uses :
      None
  • Landscaping Features
    • Landscaping :
      This species is planted as an ornamental shrub because of its fragrant, rounded clusters of small, pink flowers. Since its fragrance is strongest after dusk, it would be compatible with other flowering shrubs that are most fragrant during the day, It is ideal for butterfly gardens as a nectar plant. Plant it in the back to avoid obscuring smaller species.
      Desirable Plant Features :
      Ornamental Flowers, Fragrant (Flowers: Day, Dawn / Dusk)
      Plant & Rootzone Preference/Tolerance :
      Moist Soils, Well-Drained Soils, Fertile Loamy Soils
      Landscape Uses :
      Parks & Gardens, Small Gardens, Flowerbed / Border
      Thematic Landscaping :
      Naturalistic Garden, Wildflower Garden, Butterfly Garden
  • Fauna, Pollination & Dispersal
    • Associated Fauna :
      Butterfly Food Plant, Bee-Attracting
      Pollination Method(s) :
      Biotic (Fauna) (Insects (Butterfly, Moth); Insects (Bee))
      Seed / Spore Dispersal :
      Abiotic (Wind)
  • Plant Care & Propagation
    • Light Preference :
      Full Sun, Semi-Shade
      Water Preference :
      Moderate Water
      Maintenance Requirements :
      Moderate
      Propagation Method :
      Stem Cutting
  • Foliar
    • Foliage Retention :
      Evergreen
      Mature Foliage Colour(s) :
      Green
      Mature Foliage Texture(s) :
      Smooth
      Foliar Modification :
      Stipule
      Foliar Type :
      Simple / Unifoliate
      Foliar Arrangement Along Stem :
      Opposite
      Foliar Shape(s) :
      Non-Palm Foliage (Lanceolate)
      Foliar Venation :
      Pinnate / Net
      Foliar Margin :
      Entire
      Foliar Apex / Tip :
      Caudate
      Foliar Base :
      Acute
      Typical Foliar Area :
      Notophyll ( 20.25cm2 - 45 cm2 )
      Leaf Area Index (LAI) * for Green Plot Ratio :
      4.5 (Shrub & Groundcover - Dicot)
  • Floral (Angiosperm)
    • Flower & Plant Sexuality :
      Bisexual Flowers
      Flower Colour(s) :
      Pink
      Flower Grouping :
      Cluster / Inflorescence
      Flower Location :
      Axillary
      Flower Symmetry :
      Radial
      Individual Flower Shape :
      Salverform
      Ovary Position :
      Inferior / Epipgynous
      Flowering Habit :
      Polycarpic
  • Fruit, Seed & Spore
    • Mature Fruit Colour(s) [Angiosperms & Gymnosperms] :
      White
      Fruit Classification :
      Simple Fruit
      Fruit Type :
      Indehiscent Dry Fruit
      Seed Quantity per Fruit :
      Numerous (>20)

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