Saurauia papillulosa

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Saurauia papillulosa
Saurauia papillulosa.jpg
Herbarium specimen of Saurauia papillulosa. [1]
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Ericales
Family: Actinidiaceae
Genus: Saurauia
Species:
S. papillulosa
Binomial name
Saurauia papillulosa

Saurauia papillulosa is a species of flowering plant in the family Actinidiaceae. It is endemic to the Philippines where it is known as papayang. [3] [4] Elmer Drew Merrill, the American botanist who first formally described the species, named it after the distinctive abundant small bumps, or papillae, (papillōsus in Latin) [5] on the underside of its leaves. [6] [7]

Contents

Description

Saurauia papillulosa is a small tree 10–12 m (33–39 ft) in height with white flowers. Its leathery, oblong leaves are 7-14 by 2-5 centimeters with tips that come to a point. The leaf margins have fine serrations near their tips. The leaves have pale, sparsely bristled upper surfaces and pale lower surfaces with numerous distinctive small papillae. The leaves have 10 pairs of secondary veins emanating from their midribs. Its scaly petioles are 1-1.5 millimeters long. Inflorescences are organized as cymes consisting of a few flowers. The cymes are axillary positions on long peduncles. Its flowers have male and female reproductive structures. Its flowers have 5 elliptical sepals arranged in two rows. The three outer sepals are 6 by 3-4.5 millimeters and scaly. The two inner sepals are 8 by 5 millimeters. Its white corolla has 5 lobes that are fused only at their base and are 8 millimeters long with a notched tip. Its flowers have up to 20 stamens with 3 millimeters long filaments and 3 millimeter long anthers. Its flowers have 4-5 styles that are 3 millimeters long and united at last 1 millimeter of their base. [8]

Reproductive biology

The pollen of the species is shed as permanent tetrads. [9]

Habitat and distribution

It is found in wooded areas on Mount Polis in Luzon at around 1,500 m (4,900 ft) above sea level. [4]

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References

  1. ↑ "Saurauia papillulosa Merr". Tropicos. Tropicos.org. Missouri Botanical Garden. n.d. Retrieved August 20, 2023.
  2. ↑ Energy Development Corporation (EDC) (2022). "XSaurauia papillulosa". IUCN Red List of Threatened Species . 2022: e.T203178490A203235106. doi: 10.2305/IUCN.UK.2022-2.RLTS.T203178490A203235106.en . Retrieved August 20, 2023.
  3. ↑ "Saurauia papillulosa Merr". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. Retrieved December 19, 2018.
  4. 1 2 Merrill, E. D. (1922). An enumeration of Philippine flowering plants. Manila, Bureau of Printing.
  5. ↑ Stearn, William (2004). Botanical Latin. Portland, Ore. Newton Abbot: Timber Press David & Charles. ISBN   9780881926279.
  6. ↑ "Saurauia papillulosa Merr". ipni.org. International Plant Names Index. Retrieved 20 December 2018.
  7. ↑ Robbins, William J. (1958). "Elmer Drew Merrill, 1876-1956" (PDF). National Academy of Sciences Biographical Memoirs.
  8. ↑ Merrill, E.D. (1914). "Dilleniaceae Novae". The Philippine Journal of Science. 9, pt.C (Botany) (6): 517–530.
  9. ↑ Jagudilla-Bulalacao, L (1997) Pollen Flora of the Philippines, Volume 1, Taguig, Metro Manila: Department of Science and Technology, Special Projects Unit, Technology Application and Promotion Institute.
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