710 
Telopea Vol. 6(4): 1996 
Fig. 18. Floral development of Metrosideros collim var. viUosa. a, part of a young flower bud. 
Sepal and petal primordia have been removed and two petal scars are visible (P). There is a 
small PSB in front of each petal scar and individual stamen primordia are not present (x 200); 
b, part of a flower bud at a stage where individual stamen primordia are visible. Sepal and 
petal primordia have been removed. Tlie stamens are initiated in a single row on antepetalous 
PSBs and occur in groups centripetal to each petal. There is a gap between each group of 
stamen primordia (x 170); c, the space between each group of filaments closes as the filaments 
become larger (P - petal scars) (x 105); d, developing stamens form a continuous ring around 
the developing hypanthium but appear grouped in front of the petals due to small differences 
in position of insertion (x 100); e, entire flower bud with sepals and petals removed. Petal 
scars are indicated (P). The initial grouping of stamens in front of each petal is still discernible 
(x 50); f, part of a mature flower with a more or less continuous ring of free filaments around 
the rim of the hypanthium. There is a gap between two filaments in a position opposite a 
sepal but not between filaments opposite petals. Occasionally two filaments are fused (arrow) 
(X 13.5). (from DAO 44). 
