Nitella myriotricha A.Braun ex Kütz.

Casanova, Michelle T. & Karol, Kenneth G., 2023, Charophytes of Australia’s Northern Territory - II. Tribe Nitelleae, Australian Systematic Botany 36 (4), pp. 322-353 : 340-343

publication ID

https://doi.org/ 10.1071/SB22029

DOI

https://doi.org/10.5281/zenodo.11148856

persistent identifier

https://treatment.plazi.org/id/A70387E4-943B-2756-7D74-2FE74932FD13

treatment provided by

Felipe

scientific name

Nitella myriotricha A.Braun ex Kütz.
status

 

Nitella myriotricha A.Braun ex Kütz. Tab. Phycol. 7: 15, pl. 39. (1857)

Type: Prope McIvor, 1852?, F. v. Mueller 819 (holo: MEL!; iso: MEL!) .

Dioecious. Plants elongate, fine and flabellate with thick mucus on the upper whorls; up to 210 mm high ( Fig. 11 a View Fig ). Axes 800–950 µm in diameter; internodes 28–60 mm long; branchlets up to 30 mm long. Fertile branchlets contracted and covered in mucus ( Fig. 11 e View Fig ); 5 or 6 in a whorl, usually 3× but up to 4×furcate. Primary segments 1–2 mm long, furcate into 5–7 secondary segments up to 500 µm long; these again furcate into 4 or 5 tertiary segments ~500 µm long; these again furcate into 2–5 quaternary segments (dactyls), each 2 cells long and 500–1500 µm long. The end-cells are elongate (200–300 µm long) and briefly apiculate. Sterile branchlets 6 in a whorl, 3 or 4×furcate, to 30 mm long; primary segments approximately half the branchlet length, up to 15 mm long and 200 µm wide; secondary segments 5 or 6, 2–3 mm long and 100 µm wide; tertiary segments 2–4 to 2–3 mm long and 20 µm wide; quaternary segments 1–4, up to 2 mm long and 15 µm wide; quinary segments (where present) 3–5, up to 3 mm long and 10 µm wide ( Fig. 11 c View Fig ). Sterile dactyls 3 or 4 cells long ( Fig. 11 b View Fig ); end-cells variable but generally elongate and apiculate ( Fig. 11 d View Fig ). Gametangia at all furcations. Oosporangia up to 310 µm long; coronula ~20 µm high, upper row of cells similar to lower row of cells ( Fig. 11 e View Fig ). Oospores dark brown, 210–280 µm long, 190–210 µm wide with 7 or 8 striae with smooth flanges 10–30 µm high ( Fig. 11 f View Fig ), uniting into a crest at the apex of the oospore. Ornamentation of a smooth reticulum, the ridges sometimes developing small papillae. The specimen illustrated appears to have an incomplete reticulum ( Fig. 11 g View Fig ). Basal-cell impressions rectangular and triangular ( Fig. 11 h View Fig ). Antheridia not known. Chromosome numbers not known.

Distribution

Rivers and streams from Victoria to Queensland. This is the first record from the Northern Territory.

Specimens examined

NORTHERN TERRITORY: Parkin Road , 6 May 2010, P. Dostine 59DW73-2 ( MEL); Billabong next to the Darwin River , 4 May 2011, J. Schult t842 ( MEL) .

F

Field Museum of Natural History, Botany Department

MEL

Museo Entomologico de Leon

P

Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants

J

University of the Witwatersrand

Kingdom

Plantae

Phylum

Charophyta

Class

Charophyceae

Order

Charales

Family

Characeae

Genus

Nitella

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