Callitriche brachycarpa Hegelmaier (1868:115)

Lansdown, Richard V., 2022, The genus Callitriche (Plantaginaceae, Callitricheae) in Australasia and Oceania, Phytotaxa 547 (3), pp. 243-284 : 249-250

publication ID

https://doi.org/ 10.11646/phytotaxa.547.3.3

DOI

https://doi.org/10.5281/zenodo.6577597

persistent identifier

https://treatment.plazi.org/id/5773DE60-FF87-FF95-FF7E-FB5BFBECF816

treatment provided by

Plazi

scientific name

Callitriche brachycarpa Hegelmaier (1868:115)
status

 

3. Callitriche brachycarpa Hegelmaier (1868:115) View in CoL .

Type: AUSTRALIA. VICTORIA. tributary of the Plenty towards Mt Disappointment , 6 February 1853, F. Mueller s.n. (Lectotype [designated by Bean 2007: 547] STU 83916; Isolectotypes: MEL 50295 & 50296) .

Description: —Stem and leaf scales present. Leaf bases connate. Lingulate leaves unknown, expanded submerged or floating leaves unknown; leaves of terrestrial plants obovate, 1.6–7.0 mm long × 0.7–5.0 mm wide, 3-nerved, sometimes with free veins from the midrib, as well as free and looped veins from the outer nerves. ♂ ♀ flowers usually in the same axil. Bracts linear, hyaline, caducous, 0.3–0.5 mm long. Styles persistent, erect, 1.2–1.5 mm long. Filament erect, 0.5–2.5 mm long; anthers 0.2–0.3 mm long × 0.2–0.3 mm wide, possibly trilocular; pollen yellow. Fruit not strumose, subsessile, wider than high, light brown to blackish when mature, 0.6–1.0 mm long × 0.8–1.3 mm wide, narrowly winged throughout.

Illustrations: — Figures 4 View FIGURE 4 (a–b) and 4A(a–b) in Mason (1959). Fig. 1c View FIGURE 1 .

Recognition: — C. brachycarpa can be distinguished from other Callitriche species in the region by the combination of the small, unwinged, sessile fruit which is blackish when ripe, and ± isodiametric or wider than high and not umbonate, together with most leaf axils containing both ♀ and ♂ flowers.

Distribution: —Native. Callitriche brachycarpa is endemic to Australia, where it occurs throughout the western lowlands and on King Island in Tasmania ( Fig. 3 View FIGURE 3 ). It is also known from six locations across Victoria State; three on the Otway Coast and three in the Port Phillip area ( Curtis and Morris 1975, Parks Victoria 2000, Aston 1973). It formerly occurred at a site subject to inundation on the northern outskirts of Melbourne ( Jeanes 1999, Bean 2007, Threatened Species Section 2012) but has apparently been lost from this site.

Habitats and Ecology: — Callitriche brachycarpa occurs in creeks and rivers or in damp hollows ( Bean 2007), often in or near wet forest, but also in moist areas of dry sclerophyll forest and riparian scrub. It has been recorded with a range of Eucalyptus L’Hér. (1788: 18) and Olearia species, as well as species such as Acacia dealbata Link (1822: 445) , Atherosperma moschatum Labill. (1806: 74) and Nothofagus cunninghamii Oerst. (1873: 355) . There is no information available on the elevation range of C. brachycarpa .

Notes: —H.D. Schotsman took extensive notes which accompany the specimen HO 34457 suggesting that the anther of this species is trilocular. However, this requires confirmation based on fresh material.

Conservation Status: — Callitriche brachycarpa is very poorly-known throughout its range, with no recent data on the conservation status of populations. It is therefore classed as Data Deficient.

Additional material studied:— AUSTRALIA: TASMANIA. s.d., s.coll. s.n. ( NSW 33820); Gippsland, February 1877 , F. von Mueller 250 ( NSW 33821); Nr. Martin, 1881 , F. von Mueller s.n. (G); Picton River December 1903 , L. Rodway s.n. ( HO 72958 , HO 8145 ); Kindred, January 1910 , L. Rodway 250 ( HO 72956 , HO 8147 ); Forth River , December 1911 , L. Rodway s.n. ( HO 34457 , HO 72959 ); Fisherman’s Varna Bay , 25 January 1984 , A. M. Buchanan 2773 ( HO 83798 ); Jackeys Creek , 2 March 1986 , A. Moscal 12540 ( HO 403083) .

NSW

Royal Botanic Gardens, National Herbarium of New South Wales

HO

Tasmanian Museum and Art Gallery

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