Mangrove Flora Species

Mangroves are various kinds of plants that grows in saline costal sediment habitat in the tropics and subtropics.  A narrower definition refers only for the mangrove family of the plants, the Rhizophoraceae.  More specifically, mangroves are just for mangrove trees of the genus Rhizophora.

Mangroves form a distinct characteristic saline woodland or shrubland habitat, called mangrove swamp, mangrove forest, mangrove or mangal.  It dominates 3 quarters of tropical costlines. 

A total of about 110 species are considered mangroves, of different opinions.  Tomlinson ( 1986 ) identified 54 species ; Duke ( 1992 ) identified 69 species.  Categorization is usually based on the plants’ adaptation to low oxygen, high salinity, poor nutrient and offspring survival mechanism.

Tomlinson, in his book The Botany of Mangoves, published by the Press Syndicate of University of Cambridge in 1986, categorized mangal species into 3 groups : major elements, minor elements, and mangal associates.

Major elements are recognized by Tomlison, as ‘strict or true mangroves’, because they posses all or most of the following features :

1. complete fidelity to the mangrove environment : that is, they occur only in mangal and do not extend into terrestrial communities

2. a major role in the structure of the community and the ability to form pure stands

3. morphological specialization that adapts them to their environment; the most abvious are aerial roots, associated with gas exchange, and vivipary of the embryo, whose functional significance is not clear

4. some physiological mechanism for salt exclusion so that they can grow in sea water; they frequently visibly excrete salt

5. taxonomic isolation from terrestrial relatives.  Strict mangroves are separated from their relatives at least at the generic level and often at the subfamily or family level.  For minor mangrove, the isolation is mostly at the generic level.

Family	Genus	number of species	Species
Avicenniaceae	Avicennia	8	A. alba, A. balanophora, A. bicolor, A. eucalyptifolia, A. germinans, A. lanata, A. marina, A. officinalis,A. schaueriana, A. africana
Combretaceae	Laguncularia	1	L. racemosa
	Lumnitzera	2	L. littorea , L. racemosa,  L. x rosea ( L. racemosa x L. littorea )
Arecaceae	Nypa	1	N. fruticens
Rhisophoraceae	Bruguiera	6	B. cylindrica, B. exaristata,  B. parviflora, B. hainesii, B. sexangula, B. gymnorhiza
	Ceriops	2	C. decandra, C. tagal
	Kandelia	1	K. candel
	Rhizophora	8	R. apiculata, R. mangle, R. mucronata, R. racemosa, R. samoensis, R. stylosa,R x lamarckii ( R. apiculata x R. stylosa ), R. x annamalayana ( R. apiculata x R. mucronata ), R. x selala ( R. stylosa x R samoensis ),  R x harrisonii ( R. mangal x R. stylosa )
Lythraceae	Sonneratia	5	S. alba, S. apetala, S. caseolaris, S. griffithii, S. lanceloata, S. ovata, S. x gulngai ( S. alba x S. caseolaris )

 The minor species are distinguished by their inability to form a conspicuous element of the vegetation.  They may occupy peripheral habitats and only rarely form pure communities.

Family	Genus	number of species	Species
Bombacaceae	Camptostemon	2	C. philippinensis, C. schultzii
Eupohrbiaceae	Excoecaria	2	E. agallocha, E. indica
Lythraceae	Pemphis	1	P. acidula, P. madagascariensis
Meliaceae	Xylocarpus	2	X. granatum, X. mekongensis, X. moluccensis
Myrsinaceae	Aegiceras	2	A. corniculatum, A. floridum
Myrtaceae	Osbornia	1	O. octodonta
Pellicieraceae	Pelliciera	1	P. rhixophoreae
Plumbaginaceae	Aegialitis	2	A. annulata, A. roundifolia
Pteridaceae	Acrostichum	3	A. aureum, A. danaeifolium, A. speciosum
Rubiaceae	Scyphiphora	1	S. hyrdophyllacea
Sterculiaceae	Heritiera	3	H. fomes, H. globosa, H. littoralis

Mangoves associates are less distinctive.  They may be herbaceous or subwoody,  dispersed by sea currents, grass or rushes or sedges, ferns, etc.   Gymnosperms and conifers are likely to be excluded in the group.

Family	Genus	Species
Acanthaceae	Acanthus	A. ilicifolius, A. ebracteatus, A. volubilis
	Bravaisia
Apocynaceae	Cerbera	C. manghas
Asteraceae	Phoenix	P. paludosa
Bignoniaceae	Dolichandrone	D. spathacea
Boranginaceae	Cordia	C. subcordata
Celastraceae	Cassine	C. viburnifolia
Combretaceae	Conocarpus	C. erectus
Cyperaceae	Fimbristylis	F. ferruginea
Eupohrbiaceae	Excoecaria	E. agallocha
Fabaceae	Cynometra	C. iripa, C. ramiflora
goodeniaceae	Scaevola	S. sericea
Lecythidaceae	Barringtonia	B. acutangula, B. asiatica, B. calyptrata, B. racemosa
Malvaceae	Brownlowia	B. tersa
	Hibiscus	H. tiliaceus
	Thespesia	T. populnea
Meliaceae	Aglaia	A. cucullata
Pandanaceae	Pandanus	P. odoratissimus
etc…