Marno
Daviesia divaricata in the Kensington Bushland Reserve
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Subfamily: Faboideae
Genus: Daviesia
Species:
D. divaricata
Binomial name
Daviesia divaricata
Occurrence data from AVH
Synonyms[1]

Daviesia pedunculata Benth.

Daviesia divaricata, commonly known as marno,[2] is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a low, spreading or erect and bushy shrub with phyllodes reduced to small, triangular scales, and orange and maroon flowers.

Description

Daviesia divaricata is a low, spreading or erect and bushy shrub that typically grows to a height of 0.3–3 m (1 ft 0 in – 9 ft 10 in) and is mostly glabrous. Its phyllodes are reduced to keeled, triangular scales about 1 mm (0.039 in) long. The flowers are arranged in groups of up to six in leaf axils on a peduncle 1–3 mm (0.039–0.118 in) long, the rachis up to 3 mm (0.12 in), each flower on a pedicel 2–4.5 mm (0.079–0.177 in) long with bracts about 1 mm (0.039 in) long. The sepals are 4.0–4.5 mm (0.16–0.18 in) long and have five ribs, the lobes varying with subspecies. The standard petal is egg-shaped, 6.5–8.5 mm (0.26–0.33 in) long, 8–10 mm (0.31–0.39 in) wide and deep orange with a maroon base and a deeply notched tip. The wings are 5–7 mm (0.20–0.28 in) long and maroon, and the keel is 5–6 mm (0.20–0.24 in) long and maroon. Flowering occurs from May to early November and the fruit is a triangular pod 11–16 mm (0.43–0.63 in) long.[2][3]

Taxonomy

Daviesia divaricata was first formally described in 1837 by botanist George Bentham in Stephan Endlicher's Enumeratio plantarum quas in Novae Hollandiae ora austro-occidentali ad fluvium Cygnorum et in sinu Regis Georgii collegit Carolus Liber Baro de Hügel.[4][5] The specific epithet (divaricata) means "widely spreading".[6]

In 2017, Michael Crisp and Gregory T. Chandler described two subspecies in Phytotaxa, and the names are accepted by the Australian Plant Census:

  • Daviesia divaricata Benth. subsp. divaricata[7] has the upper two sepals joined, forming a lip about 0.25–0.5 mm (0.0098–0.0197 in) long and the lower lobes triangular;[3][8]
  • Daviesia divaricata subsp. lanulosa Crisp & G.Chandler[9] has sepal lobes about 0.75 mm (0.030 in) long with woolly hairs inside.[3][10]

Distribution and habitat

Marno grows on sand, over both limestone and laterite in near-coastal sandplains and dunes from near the Hutt River to near Busselton. Subspecies lanulosa replaces the autonym in the north and occurs from near Walkaway to the Murchison River.[2][3][8][10]

Conservation status

Both subspecies of Daviesia divaricata are classified as "not threatened" by the Western Australian Government Department of Biodiversity, Conservation and Attractions.[8][10]

References

  1. 1 2 "Daviesia divaricata". Australian Plant Census. Retrieved 14 December 2021.
  2. 1 2 3 "FloraBase: Daviesia divaricata". Western Australian Herbarium, Biodiversity and Conservation Science, Department of Biodiversity, Conservation and Attractions. Retrieved 30 May 2018.
  3. 1 2 3 4 Crisp, Michael D.; Cayzer, Lindy; Chandler, Gregory T.; Cook, Lyn G. (2017). "A monograph of Daviesia (Mirbelieae, Faboideae, Fabaceae)". Phytotaxa. 300 (1): 50–52. doi:10.11646/phytotaxa.300.1.1.
  4. ↑ "Daviesia divaricata". APNI. Retrieved 14 December 2021.
  5. ↑ Bentham, George (1837). Endlicher, Stefan F.L.; Fenzl, Eduard; Bentham, George; Schott, Heinrich W. (eds.). Enumeratio plantarum quas in Novae Hollandiae ora austro-occidentali ad fluvium Cygnorum et in sinu Regis Georgii collegit Carolus Liber Baro de Hüge. p. 31. Retrieved 19 October 2021.
  6. ↑ Stearn, William T. (2004). Botanical Latin. Oregon: Timber Press. p. 401. ISBN 9780881926279.
  7. ↑ "Daviesia divaricata subsp. divaricata". Australian Plant Census. Retrieved 14 December 2021.
  8. 1 2 3 "Daviesia divaricata subsp. divaricata". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  9. ↑ "Daviesia divaricata subsp. lanulosa". Australian Plant Census. Retrieved 14 December 2021.
  10. 1 2 3 "Daviesia divaricata subsp. lanulosa". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
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