Daviesia nudiflora
In Kensington bushland
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. nudiflora
Binomial name
Daviesia nudiflora

Daviesia nudiflora is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a bushy shrub with sharply pointed, egg-shaped to elliptic or oblong phyllodes, and yellow-orange flowers with reddish-brown markings.

Description

Daviesia nudiflora is a bushy shrub that typically grows to a height of up to 0.3–2.5 m (1 ft 0 in – 8 ft 2 in) and has more or less angular or ridged branchlets. Its phyllodes are sharply pointed, egg-shaped to elliptic or oblong, 4–50 mm (0.16–1.97 in) long, 2–18 mm (0.079–0.709 in) wide, but sometimes scale-like and 1–4 mm (0.039–0.157 in) long near the base of the plant. The flowers are arranged singly or in pairs in the axils on a peduncle 0.5–2 mm (0.020–0.079 in) long, the pedicel 2–7 mm (0.079–0.276 in) long with bracts at the base of the peduncle. The sepals are 3.0–4.5 mm (0.12–0.18 in) long and joined at the base, the two upper lobes joined for most of their length and the lower three broadly triangular and about 1 mm (0.039 in) long. The standard petal is egg-shaped or elliptic, about 7–12 mm (0.28–0.47 in) long and 7–11 mm (0.28–0.43 in) wide, and yellow-orange with a red to brown base. The wings are 7–10 mm (0.28–0.39 in) long and red, and the keel is 6–10 mm (0.24–0.39 in) long and red. Flowering occurs from May to September and the fruit is a slightly flattened triangular pod 10–14 mm (0.39–0.55 in) long.[2][3][4]

Taxonomy

Daviesia nudiflora was first formally described in 1844 by Carl Meissner in Lehmann's Plantae Preissianae from specimens collected near Lake Monger in 1839.[5][6] The specific epithet (nudiflora) means "naked-flowered".[7]

In 1995, Michael Crisp described four subspecies and the names are accepted by the Australian Plant Census:

  • Daviesia nudiflora subsp. amplectens Crisp[8] has its phyllodes evenly distributed along the branchlets, spreading at 60-90°, with a heart-shaped, stem-clasping base, and a pod 7–9 mm (0.28–0.35 in) broad;[2][9]
  • Daviesia nudiflora subsp. drummondii (Meisn.) Crisp[10] has its phyllodes evenly distributed along the branchlets, ascending at 0–30°, with a tapering base, and a pod 5–6 mm (0.20–0.24 in) broad;[2][11]
  • Daviesia nudiflora subsp. hirtella Crisp[12] has its phyllodes crowded near the tips of the branchles, spreading at 30–90°, but scale-like near the base of the plant, the edges of the phyllodes often with bristly hairs;[2][13]
  • Daviesia nudiflora Meisn. subsp. nudiflora[14] is entirely glabrous and has its phyllodes crowded near the tips of the branchles, spreading at 30–90°, but scale-like near the base of the plant.[2][15]

Distribution and habitat

This daviesia grows in mallee-heath with a shrubby understorey, and is widespread in the northern half of the wheatbelt, from near Kalbarri to near Lake Grace with disjunct populations near Bunbury and Southern Cross. Subspecies amplectens is restricted to the area from near Cadoux to near Dowerin, subsp. drummondii between Ballidu, York and Corrigin. Subspecies hirtella is found between Kalbarri, Regans Ford and Corrigin, and subsp. nudiflora has about the same distribution as the species, in the Avon Wheatbelt, Coolgardie, Geraldton Sandplains, Jarrah Forest, Mallee and Swan Coastal Plain biogeographic regions of south-western Western Australia.[2][3][9][11][13][15]

Conservation status

Daviesia nudiflora is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions,[3] but subsp. drummondii is listed as "Priority Three",[11] meaning that it is poorly known and known from only a few locations but is not under imminent threat, and subsp. amplectens as "Priority One",[9] meaning that it is known from only one or a few locations that are potentially at risk.[16]

References

  1. ↑ "Daviesia nudiflora". Australian Plant Census. Retrieved 28 February 2022.
  2. 1 2 3 4 5 6 Crisp, Michael D.; Cayzer, Lindy; Chandler, Gregory T.; Cook, Lyn G. (2017). "A monograph of Daviesia (Mirbelieae, Faboideae, Fabaceae)". Phytotaxa. 300 (1): 94–99. doi:10.11646/phytotaxa.300.1.1.
  3. 1 2 3 "Daviesia nudiflora". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  4. ↑ Barrett, R. & Tay, E.P. (2016) Perth Plants A Field Guide to the Bushland and Coastal Flora of Kings Park and Bold Park (2nd ed.) p.88, CSIRO Publishing, Clayton VIC ISBN 9781486306046
  5. ↑ "Daviesia nudiflora". APNI. Retrieved 27 February 2022.
  6. ↑ Meisner, C.D.F. in Lehmann, J.G.C. (ed.) (1844) Leguminosae. Plantae Preissianae 1(1): 53.
  7. ↑ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 262. ISBN 9780958034180.
  8. ↑ "Daviesia nudiflora subsp. amplectens". Australian Plant Census. Retrieved 28 February 2022.
  9. 1 2 3 "Daviesia nudiflora subsp. amplectens". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  10. ↑ "Daviesia nudiflora subsp. drummondii". Australian Plant Census. Retrieved 28 February 2022.
  11. 1 2 3 "Daviesia nudiflora subsp. drummondii". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  12. ↑ "Daviesia nudiflora subsp. hirtella". Australian Plant Census. Retrieved 28 February 2022.
  13. 1 2 "Daviesia nudiflora subsp. hirtella". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  14. ↑ "Daviesia nudiflora subsp. nudiflora". Australian Plant Census. Retrieved 28 February 2022.
  15. 1 2 "Daviesia nudiflora subsp. nudiflora". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  16. ↑ "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 28 February 2022.
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