Van-royena

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Van-royena
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Ericales
Family: Sapotaceae
Subfamily: Chrysophylloideae
Genus: Van-royena
Aubrév.
Species:
V. castanosperma
Binomial name
Van-royena castanosperma
(C.T.White) Aubrév.
Synonyms[1]
  • Vanroyena alternate spelling
  • Chrysophyllum castanospermum C.T.White
  • Lucuma castanosperma (C.T.White) C.T.White & W.D.Francis
  • Pouteria castanosperma (C.T.White) Baehni

Van-royena is a genus of the plant family Sapotaceae described as a genus in 1963.[2][3]

There is only one known species, Van-royena castanosperma, which is endemic to the Cook region in northern Queensland.[1][4] It grows at altitudes of 0–1,200 metres (0–3,937 ft) above sea level,[5] in rainforests.[6]

Description[]

It is a tree that can grow up to 30 m (98 ft) tall,[6] with a stem that's bark exudates (fluid emitted by an organism through pores or a wound) quite conspicuous. The narrow, yellowish, vertical stripes in the blaze shaded bark layer is thin, about 2-3 mm.[5] It has simple leaves, that are 40–110 mm (2–4 in) long and 15–50 mm (1–2 in) wide.[6][5] The petioles (leaf stalks) and twigs produce a milky exudate.[5] It has a corolla (the collective term for the petals) is about 7–12 mm (0.28–0.47 in) long, usually glabrous (lacking surface ornamentation) on both surfaces but the margins of the lobes are minutely ciliate (has small hairs). The stamens are attached well below the throat of the flower tube. The staminodes (sterile stamen) are subulate, about 2 mm (0 in) long. The ovary is about 1.5–2.5 mm (0–0 in) in diam., densely ferruginously (ruddy or rust-colored) and villous (covered with long, soft, straight hairs). The style is about 7.5–11 mm (0–0 in) long.[5] Between October and February,[6] it produces ovoid shaped fruit (or seed capsules),[5] which are 40–72 mm (2–3 in) long and 30–40 mm (1–2 in) wide.[6][5] It has 1-3 seeds per fruit, which are 25–40 mm (1–2 in) long and 25–30 mm (1–1 in) wide.[6][5] The testa (seed coat) is thick, hard and woody. The hilum (scar on a seed coat where it separates from its stalk) is 15–35 mm (1–1 in) long and 12 mm (0 in) wide.[5]

Taxonomy[]

It has several common names including; milky plum, yellow plum, saffron boxwood and poison plum.[6][7]

Under the Nature Conservation Act 1992 (NCA) of Australia, it's status is Least concern.[7]

The genus name of Van-royena is in honour of Pieter van Royen (1923–2002), a Dutch botanist. He was an author of many papers on the flora of New Guinea.[8] The Latin specific epithet of castanosperma refers to the evergreen tree of Castanospermum (in the family Fabaceae), also from Queensland.

Both the genus and the species were first described and published in Adansonia, n.s., Vol.3 on page 329 in 1963.[4]

The genus is recognized by the United States Department of Agriculture and the Agricultural Research Service, but they do not list any known species.[9]

References[]

  1. ^ a b Kew World Checklist of Selected Plant Families
  2. ^ Aubréville, André. 1963. Adansonia: recueil périodique d'observations botanique, n.s. 3: 329
  3. ^ Tropicos, Van-royena Aubrév.
  4. ^ a b "Van-royena Aubrév. | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 3 January 2022.
  5. ^ a b c d e f g h i "Vanroyena castanosperma". apps.lucidcentral.org. Retrieved 3 January 2022.
  6. ^ a b c d e f g William Cooper and Wendy Cooper Australian Rainforest Fruits: A Field Guide (2013), p. 28, at Google Books
  7. ^ a b "Species profile—Van-royena castanosperma". apps.des.qld.gov.au. 20 October 2014. Retrieved 3 January 2022.
  8. ^ Burkhardt, Lotte (2018). Verzeichnis eponymischer Pflanzennamen – Erweiterte Edition [Index of Eponymic Plant Names – Extended Edition] (pdf) (in German). Berlin: Botanic Garden and Botanical Museum, Freie Universität Berlin. doi:10.3372/epolist2018. ISBN 978-3-946292-26-5. Retrieved 1 January 2021.
  9. ^ "Genus Van-royena Aubrév". npgsweb.ars-grin.gov. Retrieved 4 January 2022.

Other sources[]

  • Swenson, U. et al. 2007. Phylogeny, diagnostic characters, and generic limitation of Australasian Chrysophylloideae (Sapotaceae, Ericales): evidence from ITS sequence data and morphology. Cladistics 23:201-228.
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