Clusia nitida Bittrich & F. N. Cabral

Bittrich, Volker, Cabral, Fernanda Nunes & Hopkins, Michael John Gilbert, 2013, Clusia nitida, a new species of Clusia (Clusiaceae) from the Brazilian Amazon, Phytotaxa 100 (1), pp. 36-40: 36-40

publication ID

http://doi.org/ 10.11646/phytotaxa.100.1.4

DOI

http://doi.org/10.5281/zenodo.5077804

persistent identifier

http://treatment.plazi.org/id/AF427A45-FFD4-C677-FF3E-F894C305FF63

treatment provided by

Felipe

scientific name

Clusia nitida Bittrich & F. N. Cabral
status

sp. nov.

Clusia nitida Bittrich & F. N. Cabral   , sp. nov. (sect. Phloianthera) ( Fig. 1 View FIGURE 1 & Fig. 2 View FIGURE 2 )

Diagnosis: Similar to Clusia microstemon   , but dry leaves are darker coloured and generally have a shiny surface, the latex channels are denser on the adaxial surface, the midrib is conspicuous as far as to the apex, the petal colour is different and anthers are absent on the lateral part of the disk-like androecium. The new species is also similar to Clusia myriandra   from which it differs by the leaf shape, the visibility of the latex channels on the leaves, the shorter peduncle and basal internodes in the inflorescence, the size of the fruits and the lesser number of seeds.

Type:— BRAZIL. Roraima: Caracaraí, Parque Nacional do Viruá , White-sand vegetation, 1º24’50.7”N, 60º59’16.5”W, 59 m, 15 October 2010, F.N. Cabral & V GoogleMaps   . S. Santos 298 (holotype INPA!)   .

Trees, small trees or shrubs up to 6 m tall; sometimes with prop roots. Plants dioecious, latex white or cream; young branches cylindrical or more frequently subangular, surface not rugulose, but finely sulcate or with tiny longitudinal foldings, linear colleters present in the petiole axils, deciduous with the leaves. Petiole 4.0–16.0(– 17.0) mm long, margin flat to revolute. Leaf blade coriaceous, discolorous, adaxial surface dark brown and shiny in sicco, oblong-elliptic, 40–85(–108) mm long and (18–)21–49(–53) mm wide, apex rounded, base attenuate, margin revolute; midrib prominent on the adaxial surface and conspicuous as far as the apex, secondary veins prominent on both surfaces, with (9–)12–26(–29) pairs, 1.5–4.0 mm distant from each other and at an angle of 35º–40º with the midrib, basal veins inconspicuous; latex canals concolorous on the adaxial surface or slightly darker than the blade, immersed, 0.3–0.7 mm distant from each other, flat to protruding on the abaxial surface, 0.8–1.0 mm distant from each other, forming an angle of about 25º with the midrib. Inflorescence cymose, compact, 3–9-flowered (staminate plants) or 3–7-flowered (pistillate plants), bracts and bracteoles united at the base, hemiorbicular, ca. 2 mm long, pedicels very short, ca. 2 mm long, quadrangular. Epicalyx bracts 2 (+2), united at base, sepals 4 (2+2), rarely 5 or 6 (2+3, 3+3), ± suborbicular, ca. 4–8 mm long and 4–8 mm wide. Petals 5–8, 6–13 x 6–12 mm, dark bordeaux or blood-red. Staminate flower with the androecium forming a thick, circular, flat disk, ca. 3–6 mm wide, composed of about 300 densely compact stamens, the upper surface covered by a mixture of resin and pollen during anthesis, filaments 2.3–3.0 mm long, lateral region of the disk without anthers, anther dehiscence by apical or transverse slits. Pistillate flower with 3 or 4 series of staminodes around the base of the ovary, secreting resin at the apex; staminodes linear, 1.3–2.0 mm long, truncated at the apex, without sterile anthers; stigmas 4 or 5, apical, yellowish, obtusely triangular, flat, 2.5 mm long; ovary yellow, ovules 1 or 2(–3) per locule. Immature fruit oval to hemispherical, 15–22 x 13–19 mm, usually finely longitudinally striate with latex canals; sepals, staminodes and stigmas persistent, valve endocarp not conspicuously hardened. Seeds 1 or 2(–3) per locule, 5.0–9.0 x 3.5–5.0 mm, green, aril orange.

Comparison: —The most similar species is C. microstemon Planchon & Triana (1860: 331)   , which sometimes occurs sympatrically, and with which C. nitida   has been confused. It has a wide distribution in the Amazon. The main difference between the species is the male androecium, which in C. microstemon   has anthers at the lateral side of the androecial disk, whereas C. nitida   has anthers only on its top. Other differences include the darker colour and the glossy appearance of the leaf surfaces in sicco in C. nitida   ; the androecium size, which is larger in C. microstemon   ; the flower colour, in C. microstemon   the petals are reddish to pinkish-purple in the centre and white-pink on the edge and the calyx is white-pink, while in C. nitida   the petals are dark bordeaux or blood-red and the calyx is green; C. microstemon   has 4 or 5 ovules per locule, whereas C. nitida   has only 1 or 2(–3) ovules per locule; the fruits of C. microstemon   are slightly ovoid and in C. nitida   they are generally cylindrical, and finally, C. microstemon   has a lower density of latex channels on the leaves than in C. nitida   and the midrib becomes invisible in the apical part of the leaves.

Another similar species is C. myriandra ( Bentham 1843: 368) Planchon & Triana (1860: 332)   from the Guianas, which has a very similar androecium. However, C. myriandra   has elongated and oblanceolate leaves, unlike C. nitida   , which has shorter and more rounded broader leaves; the latex channels of the leaves, which are easily visible in C. nitida   , are invisible in the strongly coriaceous leaves of C. myriandra   ; the peduncle and the basal internodes in the inflorescence are much longer in C. myriandra   , positioning the inflorescence above the foliage and C. myriandra   has more elongated and larger fruits than C. nitida   with 10 or more seeds per locule, while the fruit locules of C. nitida   have only 1 or 2(–3).

Etymology: —Latin nitidus = shiny, because the dried leaves generally have a conspicuously shiny surface, different from those of C. microstemon   , the leaf surface of which is typically dull.

Distribution and habitat: —In Brazil, Clusia nitida   is known from the North Region, in the states of Amazonas and Roraima. Apparently, it has not yet been collected outside of Brazil. It mainly occurs in whitesand vegetation and at river margins in Amazonian lowlands.

Additional specimens examined (paratypes): — BRAZIL. Amazonas: 2 km from Rio Cuieiras at km 2 below mouth of Rio Branquinho , 02°45' S, 60°47' W, 14 September 1973, G. T. Prance et al. 17912 (GH!, INPA!, K!, MO!, NY!, S!, U!, US) GoogleMaps   ; Rio Cuieiras just below mouth of Rio Branquinho , 2°45' S, 60°27' W, 25 September 1971, G. T. Prance et al. 14848 (MO, R!) GoogleMaps   ; Rio Cuieiras , 2 July 1975, A.B. Anderson 140 ( INPA!, MG!, UEC!)   ; s.loc., 27 April 1975, A.B. Anderson 177 ( INPA!, NY!, UEC!)   ; Rio Cuieiras , 9 October 1988, S. Mori & C. Gracie 19270 ( INPA!)   ; Manaus–Caracaraí km 130, 26 September 1974, G. T. Prance & F. Ehrendorfer 22749 ( INPA!)   , 26 September 1974, G. T. Prance & F. Ehrendorfer 22750 ( INPA!)   ; Manaus– Caracaraí km 131, 1°59' S, 60°16' W, 1 December 1974, A. Gentry 12961 (GH!, INPA!, MG!, MO!, NY!) GoogleMaps   ; km 140, 27 September 1973, C.C. Berg et al. P18180 View Materials ( INPA!)   ; km 125, 22 September 1977, W.A. Rodrigues & M.F. Silva 9765 ( INPA!)   ; km 115, 28 August 1977, W.A. Rodrigues 9717 ( INPA!)   ; Barcelos, margin of Rio Aracá next to mouth of Rio Jauari , 00°30' N, 63°30' W, 2 July 1985, I. Cordeiro 118 ( INPA!, NY, UEC!) GoogleMaps   ; 3 km S Central Massif of Serra Aracá , 00°49' N, 63°17' W, 18 July 1985, G. T. Prance et al. 29676 ( INPA!, NY, UEC!) GoogleMaps   ; margin of Rio Aracá near Serrinha , 00°25' N, 63°23' W, 25 July 1985, G. T. Prance et al. 29767 ( INPA!, NY, UEC!) GoogleMaps   ; foothills of Central Massif of Serra Aracá , 00°49' N, 63°20' W, 12 July 1985, G. T. Prance et al. 29502 ( INPA!, NY, UEC!) GoogleMaps   ; 5 km S Central Massif of Serra Aracá , 00°49' N, 63º17' W, 20 July 1985, G. T. Prance et al. 29699 (NY, UEC!) GoogleMaps   . Roraima: 7 km south of Equator , BR 174, 00°05' S, 60°40' W, 14 June 1985, I. Cordeiro et al. 30 ( INPA!, NY!) GoogleMaps   ; Manaus–Caracaraí km 522–524, 01°18' S, 60°35' W, 25 August 1987, C.A.C. Ferreira 9147 ( INPA!, NY, UEC!) GoogleMaps   ; Parque Nacional do Viruá , 1º16' N, 60º58´ W, 25 November 2009, F.N. Cabral et al. 5 ( INPA!, UEC!) GoogleMaps   ; Parque Nacional do Viruá , 1º29' N, 61º02´ W, 26 November 2009, F.N. Cabral et al. 23 ( INPA!, UEC!) GoogleMaps   ; Parque Nacional do Viruá , 1º29' N, 61º02´ W, 26 November 2009, F.N. Cabral et al. 26 ( INPA!, UEC!) GoogleMaps   ; Parque Nacional do Viruá , 1º28' N, 60º57´ W, 29 November 2009, F.N. Cabral et al. 49 ( INPA!, UEC!) GoogleMaps   ; Parque Nacional do Viruá , 1º26' N, 61º01´ W, 2 December 2009, F.N. Cabral et al. 82 ( INPA!, UEC!) GoogleMaps   ; Parque Nacional do Viruá , 1º23' N, 60º59´ W, 5 December 2009, F.N. Cabral et al. 123 ( INPA!, UEC!) GoogleMaps   ; Parque Nacional do Viruá , 1º16' N, 60º58´ W, 29 January 2010, F.N. Cabral et al. 197 ( INPA!, UEC!) GoogleMaps   ; Parque Nacional do Viruá , 1º14' N, 60º58´ W, 5 March 2010, N. Dávila et al. 6129 ( INPA!) GoogleMaps   .

Probably also R.L. Fróes 25319, Rio Urubú, Peixe Boi, 02°05' S, 60°05' W, 20 September 1949 (IAN!) belongs to Clusia nitida   , but the androecium of this specimen is hemispherically bulged similar as in Clusia hilariana Schlechtendal (1833: 181)   .

V

Royal British Columbia Museum - Herbarium

INPA

Instituto Nacional de Pesquisas da Amazonia

T

Tavera, Department of Geology and Geophysics

R

Departamento de Geologia, Universidad de Chile

MG

Museum of Zoology

UEC

Universidade Estadual de Campinas

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Clusiidae

Genus

Clusia