Rytidosperma unarede

Rytidosperma unarede
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Embryophytes
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Clade: Commelinids
Order: Poales
Family: Poaceae
Genus: Rytidosperma
Species:
R. unarede
Binomial name
Rytidosperma unarede
(Raoul) Connor & Edgar (1979)[1]
Synonyms
  • Danthonia unarede Raoul (1844)[1]

Rytidosperma unarede is a vascular plant in the family Poaceae (the grass family). The specific epithet is the Māori name unarede recorded by Raoul when the plant was first described in 1844.[1]

Description

It is an slender perennial tufted grass, growing to about 45 cm in height. The leaf blade grows up to 40 in length and 3.5 mm wide, or is tightly inrolled. The panicle is erect, slightly branched, 5–10 cm long and 1–2.3 cm wide.[1]

Distribution and habitat

The grass is native to New Zealand. It is also a rare inhabitant of Australia's subtropical Lord Howe Island in the Tasman Sea.[1] On Lord Howe it is recorded as growing in goat dung-affected soil on dry basalt.[2]

Ecology

The rust fungus Uromyces danthoniae, a species found that grows parasitically on the leaves of several Rytidosperma species in New Zealand and Australia, infects Rytidosperma unarede. It forms dense clusters of orange-brown aecidia on both surfaces of the leaf.[3]

It is also a host of Sphaerodothella danthoniae, a sac fungus that produces black, shiny leaf spots that occasionally coalesce into straight to irregular lines in the leaf surface of several species of Rytidosperma.[4][5]

References

  1. ^ a b c d e " Rytidosperma unarede ". Flora of Australia Online: Data derived from Flora of Australia Volume 49 (1994). Australian Biological Resources Study (ABRS). Retrieved 2014-02-03.
  2. ^ Green, P.S. (2012). " Rytidosperma unarede ". PlantNET: New South Wales Flora Online. Royal Botanic Garden: Sydney. Retrieved 2014-02-03.
  3. ^ McKenzie, E. H. C.; Latch, G. C. M. (July 1980). "Occurrence of Uromyces danthoniae and U. macnabbii , and additions to the graminicolous rust fungi of New Zealand". New Zealand Journal of Agricultural Research. 23 (3): 393–397. Bibcode:1980NZJAR..23..393M. doi:10.1080/00288233.1980.10425373. ISSN 0028-8233.
  4. ^ "Walker, J.; Francis, S.M. 1977: Sphaerodothis danthoniae (McAlp.) comb. nov. Transactions of the British Mycological Society 69(1): 151-152. - Biota of NZ". biotanz.landcareresearch.co.nz. Archived from the original on 2026-03-15. Retrieved 2026-06-28.
  5. ^ Pearce (2001). "Two new genera in the Phyllachoraceae: Sphaerodothella to accommodate Sphaerodothis danthoniae, and Parberya gen. nov".


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