Dorstenia luamensis

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This page is derived from the original publication listed below, whose author(s) should always be credited. Further contributors may edit and improve the content of this page and, consequently, need to be credited as well (see page history). Any assessment of factual correctness requires a careful review of the original article as well as of subsequent contributions. If you are uncertain whether your planned contribution is correct or not, we suggest that you use the associated discussion page instead of editing the page directly. This page should be cited as follows (rationale): Leal M (2014) Dorstenia luamensis (Moraceae), a new species from eastern Democratic Republic of Congo. PhytoKeys (42) : 49–55, doi. Versioned wiki page: 2014-10-24, version 65138, https://species-id.net/w/index.php?title=Dorstenia_luamensis&oldid=65138 , contributors (alphabetical order): Pensoft Publishers. Citation formats to copy and paste BibTeX: @article{Leal2014PhytoKeys, author = {Leal, Miguel E.}, journal = {PhytoKeys}, publisher = {Pensoft Publishers}, title = {Dorstenia luamensis (Moraceae), a new species from eastern Democratic Republic of Congo}, year = {2014}, volume = {}, issue = {42}, pages = {49--55}, doi = {10.3897/phytokeys.42.7604}, url = {http://phytokeys.pensoft.net/articles.php?id=4190}, note = {Versioned wiki page: 2014-10-24, version 65138, https://species-id.net/w/index.php?title=Dorstenia_luamensis&oldid=65138 , contributors (alphabetical order): Pensoft Publishers.} } RIS/ Endnote: TY - JOUR T1 - Dorstenia luamensis (Moraceae), a new species from eastern Democratic Republic of Congo A1 - Leal M Y1 - 2014 JF - PhytoKeys JA - VL - IS - 42 UR - http://dx.doi.org/10.3897/phytokeys.42.7604 SP - 49 EP - 55 PB - Pensoft Publishers M1 - Versioned wiki page: 2014-10-24, version 65138, https://species-id.net/w/index.php?title=Dorstenia_luamensis&oldid=65138 , contributors (alphabetical order): Pensoft Publishers. M3 - doi:10.3897/phytokeys.42.7604 Wikipedia/ Citizendium: <ref name="Leal2014PhytoKeys">{{Citation | author = Leal M | title = Dorstenia luamensis (Moraceae), a new species from eastern Democratic Republic of Congo | journal = PhytoKeys | year = 2014 | volume = | issue = 42 | pages = 49--55 | pmid = | publisher = Pensoft Publishers | doi = 10.3897/phytokeys.42.7604 | url = http://phytokeys.pensoft.net/articles.php?id=4190 | pmc = | accessdate = 2025-03-31 }} Versioned wiki page: 2014-10-24, version 65138, https://species-id.net/w/index.php?title=Dorstenia_luamensis&oldid=65138 , contributors (alphabetical order): Pensoft Publishers.</ref> See also the citation download page at the journal.

Taxonavigation

Ordo: Rosales
Familia: Moraceae
Genus: Dorstenia

Name

Dorstenia luamensis M. E. Leal sp. nov. – Wikispecies link – Pensoft Profile

Diagnosis

Haec species notabilis ab omnibus Dorstenia speciebus differt ob filicinu lithophitu habitu novu familae

Type

The Democratic Republic of Congo, Katanga Province, Tumbwe Sector, Luama Wildlife Reserve, M.E. Leal 2551 (holo LWI, iso BR), S5°14,526', E 28° 52,215', 1176m, 31 October 2012.

Description

Lithophytes 10–17 cm long with a tuber 0.5 cm; stems aerial, hanging, glabrous; internodes 2.5–3 cm long; no white latex or translucent exudate. Stipules absent or deciduous without scars. Leaves distichous; blade narrowly subfalcate 5–7 × 1–1.4 cm, membranaceous, apex micrunate, base cunate, adaxial side glabrous and subspiculate, abaxial side white and glabrous; margins entire; petiole 1–2 mm long; venation brochidodromous; 5–7 pairs of secondary veins; tertiary veins scalariform. Receptacle elliptic to round, 3–4 mm in diameter, patelliform; margin greenish with triangular lobes (1 mm) and subspathulate appendages, 2–3 mm long; peduncle 1 mm long, glabrous. Staminate and pistilate flowers (7 to 8) tightly packed in receptacle: perianth short lobed, whit apex minutely 2–3 lobed, glabrous; stigma 0.1 mm long. Drupes and seeds are unknown.

Distinction from other species

This new species can be distinguished from any other Dorstenia species by its fernlike habit, hanging from vertical rock faces and the absence of latex.
The new species is added to the existing key of Berg and Hijman (1999) the “key to succulent and semi-succulent species of the Old World”

Distinction from other species — M. Leal

1		Stems succulent and thick, internodes short; leaves subrosulate    section Acauloma
1	’	Stems (semi-)succulent, or herbaceous, internodes long; leaves spaced, sometimes crowded at stem apices    section Kosaria, 2
2		Plants stem hanging
3		Plant lithophyte, multiple appendages    Dorstenia luamensis
3	’	Plant epiphyte, one appendage    Dorstenia astyanactis
2	’	Plants stem erect to ascending
4		Plants annual, without a rhizome or a tuber    Dorstenia annua
4	’	Plants perennial, with rhizome or a tuber
5		Petiole relatively short, (0-)0.1–0.2(-0.5) cm long    Dorstenia benguellensis
5	’	Petiole relatively long (0.2-)0.5–2.5(-3) cm long    other species of section Kosaria

Phenology

The specimens were collected in late October.

Ecology

Dorstenia luamensis M.E.Leal inhabits moist and shady vertical rock faces close to small waterfalls in forest within a riverine forest-open woodland-savanna mosaic.

Distribution and conservation status

The species is distributed in small populations within the type locality, and according to these demographic characteristics it merits the conservation status of endangered (EN).

Etymology

The epithet luamensis refers the Luama Wildlife Reserve which is drained by the Luama River.

Original Description

• Leal, M; 2014: Dorstenia luamensis (Moraceae), a new species from eastern Democratic Republic of Congo PhytoKeys, (42): 49-55. doi

Images

Figure 1. Dorstenia luamensis M.E. Leal A habit B receptacle.  Figure 2. A population of Dorstenia luamensis M.E.Leal on a vertical rock face (photo: M.E. Leal 2012).