Boronia tolerans

Boronia tolerans is a plant in the citrus family, Rutaceae and is endemic to a small area in the Northern Territory in Australia. It is an erect shrub with many branches, pinnate leaves and white, four-petalled flowers. It is only known from Nitmiluk National Park.

Boronia tolerans
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Sapindales
Family: Rutaceae
Genus: Boronia
Species:
B. tolerans
Binomial name
Boronia tolerans
Occurrence data from Australasian Virtual Herbarium

Description

Boronia tolerans is an erect, much branched shrub that grows to a height of about 50 cm (20 in). The leaves are arranged in opposite pairs, pinnate, sessile with mostly five or seven leaflets and 7–50 mm (0.28–1.97 in) long and 8–17 mm (0.31–0.67 in) wide in outline. The end leaflet is linear to narrow elliptic, 8–25 mm (0.31–0.98 in) long, 1–2.5 mm (0.039–0.098 in) wide and the side leaflets are 5–16 mm (0.20–0.63 in) long, 1–2 mm (0.039–0.079 in) wide. The flowers are arranged singly in leaf axils on a pedicel 1–2 mm (0.039–0.079 in) long. The sepals and petals are white, the four sepals triangular to egg-shaped, 4–5 mm (0.16–0.20 in) long and about 1.5 mm (0.059 in) wide but increase in size as the fruit develops. The four petals are 3.5–5 mm (0.14–0.20 in) long but increase in size as the fruit develops. There are eight stamens and the style is glabrous. Flowering occurs from March to June.[2][3][4]

Taxonomy and naming

Boronia tolerans was first formally described in 1997 by Marco F. Duretto who published the description in the journal Nuytsia.[5] The specific epithet (tolerans) is derived from Latin tolerans, meaning "tolerant", referring to "the great mental hardship suffered by Dr Greg Howell on the day this species was collected in the field."[3]

Distribution and habitat

This boronia grows in woodland on the top of the plateau in the Nitmiluk National Park.[4][3]

Conservation status

Boronia tolerans is classified as "near threatened" under the Territory Parks and Wildlife Conservation Act 2000 (TPWCA).[4]

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References
  1. "Boronia tolerans". Australian Plant Census. Retrieved 10 May 2019.
  2. Duretto, Marco F.; Wilson, Paul G.; Ladiges, Pauline Y. "Boronia tolerans". Flora of Australia. Australian Biological Resources Study, Department of the Environment and Energy, Canberra. Retrieved 12 May 2019.
  3. Duretto, Marco F. (1997). "Taxonomic notes on Boronia species of north-western Australia, including a revision of the Boronia lanuginosa group (Boronia section Valvatae:Rutaceae)". Nuytsia. 11 (3): 326–328. Retrieved 12 May 2019.
  4. "Boronia tolerans". Northern Territory Government. Retrieved 12 May 2019.
  5. "Boronia tolerans". APNI. Retrieved 12 May 2019.
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