Greater freedom of moulding and the use of trefoil and cinquefoil may be, but need not be, explained in this way.
When the summits of these are worn by mastication their surfaces present circles of dentine surrounded by a border of enamel, and as attrition proceeds different patterns are produced by the union of the bases of the cusps, a trefoil form being characteristic of some species.
At Fontevrault shows a development of the crown; the trefoil heads are expanded, and are chased and jewelled.
Lucerne and a trefoil called shaftal form important fodder crops in the western parts of the country, and, when irrigated, are said to afford ten or twelve cuttings in the season.
The badge of the combined order is composed of the white cross with trefoil termination of St Lazarus resting on the green cross of St Maurice; both crosses are bordered gold.