Listera ovata (Common Twayblade)
YEAR	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002
FERTILE  STERILE	7 0	? ?	6 33	? ?	22 43	28 15	? ?	0 24	55 13	87 59	94 118	115 77	84 101	134 97	(87) (130)	(n.a.) (n.a.)
Comments to the Table: With L. ovata living in colonies and with a single plant having the ability to produce more than one stem, it is obviously impossible to count the number of individuals by the method described. Therefore, the figures in the table are the recorded number of stems. (To see graph, point at ). A ' ? ' indicates that no registration was done in the year in question.

Last updated on 30 June, 2009

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