Fiorella fernanda mazine



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Revista Brasil. Bot., V.33, n.2, p.285-290, abr.-jun. 2010

Three new species of Eugenia sect. Racemosae (Myrtaceae) from the 

cerrados of the state of Mato Grosso, Brazil

FIORELLA FERNANDA MAZINE

1,3

 e VINICIUS CASTRO SOUZA



2

(received: May 03, 2007; accepted: March 29, 2010)



ABSTRACT – (Three new species of Eugenia sect. Racemosae (Myrtaceae) from the cerrados of the state of Mato Grosso, 

Brazil). Three new species of Eugenia sect. Racemosae (Myrtaceae) from cerrado vegetation of central region in Brazil are 

described and illustrated. They are: Eugenia hatschbachii Mazine, Eugenia mattogrossensis Mazine and Eugenia glabrescens 

Mazine. Data on the geographic distribution and habitat are given for the new taxa.

Key words - Brazil, Eugenia, Myrtaceae, taxonomy

RESUMO – (Três espécies novas de Eugenia sect. Racemosae (Myrtaceae) dos cerrados do Estado do Mato Grosso, Brasil). 

Três espécies novas de Eugenia sect. Racemosae (Myrtaceae) dos cerrados da região central do Brasil são descritas e ilustradas. 

São elas: Eugenia hatschbachii Mazine, Eugenia mattogrossensis Mazine e Eugenia glabrescens Mazine. São fornecidos dados 

de distribuição geográfi ca e hábitat de cada um dos táxons.

Palavras-chave - Brasil, Eugenia, Myrtaceae, taxonomia

1. 


Universidade Federal de São Carlos, câmpus Sorocaba, Rodovia 

João Leme dos Santos, km 110, SP-264, 18052-780 Sorocaba, SP, 

Brazil.

2. 


Universidade de São Paulo, Escola Superior de Agricultura “Luiz 

de Queiroz”, Departamento de Ciências Biológicas, Caixa Postal 9, 

13418-900 Piracicaba, SP, Brazil.

3. 


Corresponding author: fi orella@ufscar.br

Introduction

As referred by Holst (2002), Eugenia  is one of 

the neotropical genera of Myrtaceae most in need of 

study, as Myrcia is. Because of their large sizes, no one 

has attempted to treat them as a whole since the major 

publications of Berg (1856, 1857, 1858a, 1858b, 1859, 

1860, 1861).

The largest of the New World Myrtaceae genera, 



Eugenia L. is currently estimated to contain 500 (Holst et 

al. 2003) to 2,000 species (Sanchez-Vindas et al. 2001), 

distributed from South of Mexico, Cuba, the Antilles to 

Uruguay and Argentina, with a small number of species 

(ca. 60) in Africa (Merwe et al. 2005).

The species of Eugenia have been classifi ed by Berg 

(1856) into sections based on infl orescence morphology. 

According to Mazine (2006), Eugenia sect. Racemosae 

O. Berg is a phylogenetically consistent group, diagnosed 

by its fl owers exclusively in racemes and/or panicles, 

with a distinctive axis bearing the fl owers along with 

a proportion pedicel × internode of 2×1 ratio or less. 

During the preparation of a monograph of the Brazilian 

species of Eugenia sect. Racemosae O. Berg, several new 

species were found. Descriptions of three new species 

of  Eugenia  sect.  Racemosae  from the cerrado region 

of central Brazil are presented here. Distribution data, 

illustrations as well as comments on all species are also 

presented.



Results and discussion

Eugenia hatschbachii Mazine, sp. nov. Type: BRAZIL. 

M

ATO



 G

ROSSO


: Barra do Bugres, fazenda Ochsenfeld, 23-

X-1995, G. Hatschbach, A.V. Pott & E. Barbosa 63773 

(holotype MBM).

Figure 1


Racemi multifl ori, rhachidi glabra, hypanthio glabro, 

bracteae  fl orales  caducae.  Ab  Eugenia  glabrescenti 

Mazine alabastro c. 2 mm diam. (nec 3-3.5 mm) et 

pedicelo 1-2.5 mm (nec 5-9 mm) differt.

Tree ca. 5 m; branches glabrous. Leaf blade oblong-

lanceolate, 6-8.5 cm long, 1.6-2.3 cm wide, chartaceous, 

glabrous on the upper surface, glabrous to subglabrous 

on the lower surface, hairs simple; apex acute-acuminate; 

base acute; midvein sulcate on the upper surface; lateral 

veins slightly prominent, marginal vein ca. 1.5 mm from 

the margin; glandular dots slightly prominent on the 

upper surface; petiole 4-6 mm long. Raceme with 6-10 

pairs of fl owers, axillary or extra-axillary, peduncled 

to subsessile, peduncle 0-2 mm long; rachis 2-3 cm 

long, glabrous. Flower bud ca. 2 mm diam.; fl oral 

bracts deciduousca. 1 mm long; pedicel 1-2.5 mm, 

glabrous; bracteoles ca. 0.5 mm, persistent, free (not 

connate on the base), apex acute, glabrous with margin 

ciliate; sepals ca. 1 mm long, apex acute, glabrous, 

ciliate, persistent; petals 2-5 mm long, orbicular, apex 


286

 

F. F. Mazine & V. C. Souza: New species of Eugenia sect. Racemosae



Figure 1. Eugenia hatschbachii Mazine. a. Flowering branch. b. Detail of the infl orescence with a pair of fl ower buds. c. Flower, 

side view. d. Medial section of ovary. (Hatschbach 63773).

a

b

c



d

1 cm


1 mm

1 mm


2 mm

 

Revista Brasil. Bot., V.33, n.2, p.285-290, abr.-jun. 2010 

287

rounded; fi laments ca. 2 mm long, glabrous; hypanthium 



glabrous, surface smooth, style ca. 2 mm long, glabrous. 

Fruit not observed.

Etymology – the specifi c epithet honors Dr. Gerdt 

Hatschbach, Brazilian botanist who collected the type.

Known only from the type collection (cerrado of the 

region of Barra do Bugres in the State of Mato Grosso, 

Brazil), Eugenia hatschbachii is morphologically related 

to the group of species characterized by deciduous 

fl oral bracts, group where Eugenia aeruginea DC. 

and  E. brownsbergii Amsh., for example, are also 

circunscribed.  Eugenia hatschbachii has plurifl orous 

infl orescences, with glabrous rachis and fl owers with 

glabrous hypanthium. The fl owers are very small, the 

fl oral bud is ca. 2 mm in diameter, which can be used to 

distinguish it of Eugenia glabrescens (also described in 

this paper), in addition to the very short pedicel.



Eugenia mattogrossensis Mazine,  sp. nov. Type: 

BRAZIL. M

ATO

 G

ROSSO



: Cláudia, perímetro urbano, 

09-XI-1996, G. Árbocz 3167-A (holotype ESA).

Figure 2

Frutex vel suffrutex, fl ores dispositi in racemis 

axillaribus et apicalibus, vel in paniculis racemorum, 

rhachis racemi et hypanthium dense puberulum (velveto 

simile), bracteae fl orales ca. 3 mm longae, alabastra 

4-5 mm diam., globosa, pedicelli 2.5-3.5 mm longi. Ab 

Eugenia polystachya Mazine bracteis fl oralibus caducis 



differt.

Figure 2. Eugenia mattogrossensis Mazine. a. Flowering branch. b. Flower, side view. c. Flower bud, side view. d. Medial 

section of ovary. (Árbocz et al. 3167-A).

a

b



c

d

1 cm



2 mm

2 mm


1 mm

288

 

F. F. Mazine & V. C. Souza: New species of Eugenia sect. Racemosae



Figure 3. Eugenia glabrescens Mazine. a. Flowering branch. b. Flower bud, side view. c. Flower, side view. d. Medial section 

of ovary. (Prance & Silva 59428).

a

b

c



d

1 cm


1 mm

1 mm


0,5 mm

 

Revista Brasil. Bot., V.33, n.2, p.285-290, abr.-jun. 2010 

289

Subshrub to shrub 0.7-1.8 m; branches puberulous. 



Leaf blade elliptic, 12.5-16.8 cm long, 5.1-8 cm wide, 

chartaceous, subglabrous to puberulous on both surfaces, 

hairs simple; apex acuminate; base acute or obtuse-rounded; 

midvein sulcate on the upper surface; lateral veins fl at to 

slightly prominent, marginal vein 3-4 mm from the margin; 

glandular dots indistinct or prominent; petiole 5-7 mm long. 

Racemes and/or panicle of racemes, with 7-15 pairs of 

fl owers, axillary, peduncled or sessile, peduncle 0-7 mm 

long; rachis 5-11.4 cm long, densely puberulous, hairs 

whitish. Flower bud 4-5 mm diam.; fl oral bracts deciduous 

at the fl oral  bud,  ca. 3 mm long; pedicel 2.5-3.5 mm, 

densely puberulous; bracteoles ca. 1 mm long, connate 

on the basis, apex obtuse or rounded, sparsely puberulous, 

margin ciliate, persistent; sepals ca. 2 mm long, apex 

rounded, sparsely puberulous, margin ciliate, persistent; 

petals 3-5 mm long, apex rounded; fi laments 4-5 mm long, 

glabrous; hypanthium densely puberulous, smooth, style 

ca. 10 mm long, glabrous. Fruit not observed.

Paratypes: BRASIL. M

ATO

 G

ROSSO



: Cuiabá, Chapada 

dos Guimarães, margem do rio Coxipozinho, perto da 

rodovia, 15°30’ S 55°45’ W, 21-X-1985, J. Pirani 1343 

(K, MG, SPF). Cristianópolis, rodovia MT 339, 18 km 

de Cristianópolis para Tangará da Serra, 25-X-1995, G. 

Hatschbach, A.V. Pott & E. Barbosa 63883 (MBM).

Eugenia mattogrossensis is a shrub from Mato 

Grosso state, with fl owers that can be arranged in simple 

racemes or panicles of racemes. The indumentum of 

the rachis and hypanthium of this species is densely 

puberulous and similar to velvet, its racemes are long, 

always axillary and on the top of the branches. It has 

also very short pedicels and large, globose fl ower buds. 

The fl oral bracts are large and early deciduous, falling 

before anthesis.

Eugenia glabrescens Mazine, sp. nov. Type: BRAZIL. 

Mato Grosso: Serra do Roncador, road Nova Xavantina 

to Barra do Garças, 55 km north of Barra do Garças, 

15-X-1964, G.T. Prance & N.T. Silva 59428 (holotype 

RB, isotypes F, K, UB).

Figure 3


Folia glabra ad subglabra, racemi axibus tenuibus 

et  fi liformibus, hypanthium subglabrum. Eugeniae 

egensis DC. affi nis, sed racemis rachidi 2.5-4.5 cm longa 



(nec brevi, rachidi 0,2-1,5 cm longa), bracteis fl oralibus 

caducis (nec persistentibus) distincta.

Tree ca. 6 m, branches densely pubescent. Leaf blade 

elliptic-lanceolate, 8.7-11 cm long, 2.3-2.8 cm wide, 

chartaceous, glabrous to subglabrous on both surfaces, 

hairs simple and dibrachiate, apex acuminate, base acute, 

midvein sulcate, subglabrous to very sparsely pubescent 

in both surfaces, lateral veins proeminent, marginal vein 

ca. 1.5 mm from the margin; glandular dots indistinct on 

the upper surface; petiole 5-7 mm long. Raceme with 7-

11 pairs of fl owers, axillary or extra-axillary, subsessile, 

peduncle 1-3 mm long, rachis 2.5-4.5 cm long, sparse to 

densely pubescent, hairs whitish. Flower bud 3-3.5 mm 

diam.,  fl oral bracts deciduous, 1.5 mm long, pedicel 

5-9 mm long, sparse to densely pubescent, bracteoles 

ca. 1 mm long, free (not connate on the base), apex acute, 

subglabrous, ciliate, persistent, sepals ca. 1 mm long, apex 

acute or rounded, subglabrous, ciliate, persistent; petals 

ca. 4 mm long, orbicular, apex obtuse-rounded; fi laments 

3-4 mm long, subglabrous; hypanthium subglabrous, style 

3-4 mm long, subglabrous. Fruit not observed.

Eugenia glabrescens is known only from the type 

collection (Serra do Roncador, Mato Grosso State). The 

leaves and fl owers with a subglabrous hypanthium of 

Eugenia glabrescens are similar to those of Eugenia 

egensis  DC., from Central America to Northeastern 

Argentina (Govaerts et al. 2008). However, E. egensis 

is not part of Eugenia  sect.  Racemosae.  Furthermore, 

Eugenia glabrescens has deciduous bracts, while the 

bracts of E. egensis are persistent. The racemes of Eugenia 



glabrescens are longer and have delicate, fi liform axis.

Acknowledgments – The authors express sincere appreciation 

to the following individuals: Maria Alice Rezende, for her 

care in preparing the plates here presented; the reviewers, 

for the helpful comments and valuable suggestions; Marcos 

Sobral and Eve Lucas for the discussions about the species; 

Cássio van den Berg, for correcting the Latin diagnoses. 

Fapesp, IAPT and KLARF are gratefully acknowledged for 

providing support during the development of the activities in 

Piracicaba-SP and at the Royal Botanic Gardens Kew.



References

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BERG, O. 1857. Myrtaceae. In Flora brasiliensis (C.F.P. 

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BERG, O. 1858a. Revisio Myrtacearum Americae. Linnaea 

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BERG, O. 1858b. Myrtaceae. In Flora brasiliensis (C.F.P. 

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F. F. Mazine & V. C. Souza: New species of Eugenia sect. Racemosae



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