Sabicea floribunda var. paucinervis Wernham,

Lachenaud, Olivier, Zemagho, Lise & Sonké, Bonaventure, 2020, A synopsis of the Sabicea floribunda group (Rubiaceae) from Central Africa, including three new species, Candollea 75 (1), pp. 115-143 : 130-132

publication ID

https://doi.org/ 10.15553/c2020v751a12

DOI

https://doi.org/10.5281/zenodo.6343134

persistent identifier

https://treatment.plazi.org/id/5F1C9F17-8C1D-4E04-425E-F24487255049

treatment provided by

Carolina

scientific name

Sabicea floribunda var. paucinervis Wernham,
status

 

3d. Sabicea floribunda var. paucinervis Wernham, Monogr. Sabicea: 73. 1914 ( Fig. 7B View Fig ).

Lectotypus (designated here): CAMEROON. Reg. South: Gross-Batanga, 3.XII.1890, imm.fr., Dinklage 743 ( P [ P 03793520]!; isolectotype: WAG [ WAG 0034480]!). Syntypus: CAMEROON. Reg. South: Kribi, 24.X.1891, buds, Dinklage 1391 ( P [ P 03793519]!, WAG [ WAG 0034479]!).

Distribution, ecology and phenology. – This variety occurs in southern Cameroon from Kribi to Campo, in Equatorial Guinea ( Rio Muni) and in Gabon, where it is found mostly in the northwest (Crystal Mts) with one record further south in the Chaillu massif ( Fig. 8 View Fig ). Its range locally overlaps with that of var. floribunda in Gabon and Equatorial Guinea. It grows in secondary forest regrowth, often along roads, 0–540 m in elevation.

Flowers have been recorded from March to May and October to December; fruits in August-September and from November to March.

Conservation status. – The extent of occurrence ( EOO) of S. floribunda var. paucinervis is calculated to be 21,218 km ², a little above the limit for “Vulnerable” status under subcriterion B 1. Its area of occupancy ( AOO) is estimated to be 80 km ², which falls within the limit for “Endangered” status under subcriterion B 2, but is certainly an underestimation given the low collecting density in most of its range. The taxon occurs in Atlantic Central Africa ( Cameroon, Gabon and Equatorial Guinea) and is known from 21 specimens. It is found in secondary forest habitats where it appears to be locally common, and given its ecology there is no evidence of a particular threat; consequently, it is here assessed as “Least Concern” [LC] using the IUCN Red List Categories and Criteria ( IUCN, 2012).

Notes. – This taxon differs from other varieties by its leaves with fewer secondary veins (8–13 pairs only) and the generally sparser indumentum of its vegetative parts – the stems being glabrous or nearly so, and the leaves glabrous except on veins. Its original description is based on two syntypes, Dinklage 743 and Dinklage 1391 ( B), both of which were presumably destroyed in the Second World War but have extant duplicates in P and WAG. The P sheet of Dinklage 743, which is the most complete, is chosen here as lectotype.

Additional material studied. – CAMEROON. Reg. South: Kribi-Campo, 35 km S de Kribi, 4. I.1983, imm. fr., van der Zon 1983 ( WAG); 3 km S of Kribi, Grand Batanga road, 25.X.1968, fl., Bos 3134 ( BR, K, P, WAG, YA); 5 km S of Kribi, Grand Batanga road, 26.II.1969, fr., Bos 4005 ( BR, P, WAG, YA); near Eboundja I, km 20 road Kribi-Campo, 4. I.1983, imm.fr., de Kruif 1020 ( WAG, YA); Ebundja 2, village along road from Kribi to Campo, 17.III.2007, buds, Dessein 1640 ( BR, P); 45 km on the road from Kribi to Campo, 3.XII.1974, fl., J. J. F. E. de Wilde 7784 A ( BR, WAG); 10 km ENE Ebodje, soit 40 km S Kribi, 7.XII.1979, fl., Letouzey 15322 ( BR, P, YA); Campo Ma’an National Park, 12.II.2012, fr., Sonké 5915 ( BR, MO, YA); Campo-Ma’an area, Massif des Mamelles, Along the path to Mamelles highlands, 23.IV.2001, buds, Tchouto Mbatchou et al. 3223 ( WAG); Dipikar, road to centre of Island, 7.V.2001, fl., van Andel et al. 3421 ( WAG); Campo Ma’an National Park, road Kribi-Ebodje Along small logger’s road, c. 2.7 km from Lolabé village, 4.VIII.2001, fr., van Andel et al. 3827 ( WAG).

EQUATORIAL GUINEA. Litoral: Bata-Monson-Dibolo, Estrada kms 54–55, 15.X.1991, fl., Carvalho 4887 ( BR, WAG); Bata-Mari, Estrada kms 62–63, 15.XI.1991, imm.fr., Carvalho 4949 ( WAG). Centro-Sur: 4 km N de Mitong, 12.XII.2003, buds, Sonké 3136 ( BR, BRLU, K).

GABON. Estuaire: 89 km along the road Libreville-Assok, Mts de Cristal, 14.VIII.1978, imm.fr., F. J. Breteler & J. J. F. E. de Wilde 7 ( BR, LBV, WAG); Crystal Mountains, 3 km NE of Kinguélé, 11.IX.1994, fr., F. J. Breteler et al. 12808 ( LBV, WAG); km 10 Tchimbélé-Kinguélé, 11.II.1986, fr., Breyne 5102 ( BR, LBV); Crystal Mountains, 8 km on the road Tchimbélé to Kinguélé (= 74 km on SEEG road), 15.XI.2004, fl. & fr., Wieringa et al. 5440 ( BR, K, LBV, WAG). Ngounié: Chantier Leroy, rte à 13 km de Masika vers Yeno sur rte Mouila-Yeno, 12.II.1988, imm.fr., A. M. Louis 2733 ( LBV, WAG). WoleuNtem: Tchimbélé, 0.5 km S of dam, 19.III.1990, fr., Wieringa 720 ( BR, LBV, WAG).

P

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

WAG

Wageningen University

E

Royal Botanic Garden Edinburgh

R

Departamento de Geologia, Universidad de Chile

S

Department of Botany, Swedish Museum of Natural History

A

Harvard University - Arnold Arboretum

B

Botanischer Garten und Botanisches Museum Berlin-Dahlem, Zentraleinrichtung der Freien Universitaet

F

Field Museum of Natural History, Botany Department

N

Nanjing University

J

University of the Witwatersrand

I

"Alexandru Ioan Cuza" University

BR

Embrapa Agrobiology Diazothrophic Microbial Culture Collection

K

Royal Botanic Gardens

MO

Missouri Botanical Garden

BRLU

Université Libre de Bruxelles

LBV

CENAREST

M

Botanische Staatssammlung München

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Gentianales

Family

Rubiaceae

Genus

Sabicea