Flora and Fauna Series

The Improved Flora and Fauna Series of the Philippine peso. It was minted from 1991 to 1994.

In 1983, eight years after the introduction of the Ang Bagong Lipunan Series, a new series called the Flora and Fauna Series was introduced, in which the coins, in addition to featuring various Philippine national heroes as before, also began featuring plant and animal life forms native to the Philippines. The 50-sentimo and 2-piso denominations were reintroduced, the latter of which had not been struck as a coin since the Spanish had struck it in gold. The 5-piso denomination was stopped, but production resumed (in a new, smaller size) in the final four years of the Flora and Fauna Series, which featured reduced sizes for all denominations.

The Flora and Fauna series contained errors on two coins, in 1983. The text on the 10-sentimo coin for the scientific name of the Philippine goby was minted as "Pandaka pygmea" instead of "Pandaka pygmaea", and the 50-sentimo coin showing the Philippine eagle misspelled the scientific name as "Pithecobhaga jefferyi" instead of "Pithecophaga jefferyi".

In 1985, some of the 1-peso and 25-sentimo coins had a double strike error.[1]

In 1991, the Improved Flora and Fauna Series was introduced. The denominations from 25 sentimo up to 2 peso were smaller, and the 5-peso coin was reintroduced. Some commemorative coins in 1991 were minted in the larger size. The size of the 25- and 50-sentimo coins of the Improved Flora and Fauna Series are same as the size of the twenty-five-satang and fifty-satang coins of Thailand, and the 50-sentimo (IFF series) and 50-satang coins (Thailand) both have reeded edges.

Flora and Fauna Series
Image		Value	Diameter	Thickness	Mass	Composition	Edge	Obverse	Reverse	Year of
Obverse	Reverse									First minting	Withdrawal
		1 sentimo	15.5 mm	1.67mm	0.70 g	Aluminum and magnesium 99.2% Al 0.8% Mg	Plain	Voluta imperialis, Value	State title, Lapu-Lapu, year of minting	September 30, 1983	December 31, 2000
		5 sentimo	17.0 mm	2.04mm	1.10 g			Vanda sanderiana (Waling-waling), Value	State title, Melchora Aquino, year of minting
		10 sentimo	19.0 mm	2.27mm	1.50 g			Pandaka pygmaea (Philippine Goby), Value	State title, Francisco Baltazar, value, year of minting
		25 sentimo	21.0 mm	1.67mm	3.85 g	Brass (65% copper; 35% zinc)	Reeded	Graphium idaeoides, Value	State title, Juan Luna, year of minting	September 30, 1983	March 31, 1995
		50 sentimo	25.0 mm	1.67mm	6.05 g	Copper-nickel 75% Cu 25% Ni	Plain	Pithecophaga jefferyi (Philippine Eagle), Value	State title, Marcelo H. del Pilar, year of minting	September 30, 1983	March 31, 1995
		₱1	29.0 mm	2.06mm	9.5 g		Reeded	Anoa mindorensis (Tamaraw), Value	State title, José Rizal, year of minting
		₱2	31 mm (across corners, decagon) 29.8 mm (across flats, decagon)	2.18mm	12 g		Plain	Cocos nucifera (Coconut Tree), Value	State title, Andrés Bonifacio, year of minting
Improved Flora and Fauna Series (1991–1994)
		25 sentimo	16.0 mm	1.67mm	2.2 g	Brass	Plain	Graphium idaeoides, Value	State title, Juan Luna, year of minting	April 1, 1991	December 31, 2000
		50 sentimo	18 mm	1.8mm	3 g		Reeded	Pithecophaga jefferyi (Philippine Eagle), Value	State title, Marcelo H. del Pilar, year of minting
		₱1	21.5 mm	1.67mm	4 g	Stainless steel	Plain	Anoa mindorensis (Tamaraw), Value	State title, José Rizal, year of minting	April 1, 1991	December 31, 2000
		₱2	23.5 mm	2 mm	5 g		Reeded	Cocos nucifera (Coconut Tree), Value	State title, Andrés Bonifacio, year of minting
		₱5	26 mm	2.5mm	9.5 g	Nickel-brass	Reeded	Pterocarpus indicus (Narra), Value	State title, Emilio Aguinaldo, year of minting	April 1, 1991	December 31, 2000

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