Typhonium praetermissum

Typhonium praetermissum
Typhonium praetermissu, NT Herbarium
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Order:	Alismatales
Family:	Araceae
Genus:	Typhonium
Species:	T. praetermissum
Binomial name
Typhonium praetermissum A.Hay, 1997 [1]
Synonyms[2]
Lazarum praetermissum

Typhonium praetermissum is a species of plant in the arum family that is endemic to the Northern Territory of Australia.[3] In 2022, Hay and others resurrected the genus, Lazarum, and renamed the species as Lazarum praetermissum[4] (a name accepted by Plants of the World Online).[5]

Description

Flower of the Typhonium praetermissum, NT Herbarium

The species is a geophytic, perennial herb, which resprouts annually from a corm. The leaves vary from oval in shape to deeply divided, up to 4.5 cm long, on a stalk up to 5.5 cm long. The flower is enclosed in a brown and maroon spathe 4 cm long. The small fruits appear in November and December.[3]

Distribution and habitat

The species occurs in the tropical Top End of the Northern Territory, with a range limited to the vicinity of Darwin and the Litchfield shire including Middle Arm, Virginia, Karama, Noonamah, the Palmerston escarpment and Mandorah.[6] Many sub-populations are under increasing pressure from development and weed incursion.[7]

It is found mainly in open woodland habitats with red-brown clay or lateritic soils,[3] typically in Eucalyptus miniata woodland on well drained soils, and on the margins of plateaus.[7]

Conservation status

NT Flora lists the species as "vulnerable".[8]

References

1. Hay, A (1997). "Two new species and a new combination in Australian Typhonium (Araceae Tribe Areae)". Edinburgh Journal of Botany. 54 (3): 329–336. doi:10.1017/S0960428600004157.
2. "Typhonium praetermissum A.Hay | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 2024-01-12.
3. John Westaway & Ian Cowie (2012). "Typhonium praetermissum" (PDF). Threatened Species of the Northern Territory. Northern Territory Government. Retrieved 3 October 2021.
4. Hay, A., Barrett, M. D., Hetterscheid, W. L. A., & E2, R. N. B. (2022). "New combinations in resurrected Lazarum A. Hay (Araceae–Areae)". Aroideana. 45: 133–137.
5. "Lazarum praetermissum (A.Hay) M.D.Barrett, A.Hay & Hett. | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 2024-01-12.
6. Holmes, Jarrad; Bisa, Deborah; Hill, Audrey; Crase, Beth (May 2005). A Guide to Threatened, Near Threatened and Data Deficient Plants in the Litchfield Shire of the Northern Territory. Ultimo, Australia: WWF-Australia. p. 6. ISBN 1-87594185-1.
7. "Threatened Species of the Greater Darwin Region - Typhonium praetermissum" (PDF). Northern Territory Government. July 2016. Retrieved 12 January 2023.
8. "NT Flora factsheet: Typhonium praetermissum". efloraNT.gov.au. Retrieved 12 January 2024.