Can anybody tell me some more about this one ?
A member off a dutch forum has this one,brought some seed off it in 88 from suriname.
He thinks it,s a C. macrophylla Wester,but is not sure.

Could it perhaps be alternative spelling of 'Alemow'? - phonetically very similar.
This is Citrus macrophylla:
Alemow is a hybrid of Celebes papeda (Citrus celebica) with a species of the subgenus Citrus, probably a pomelo (Citrus maxima). It has been tried as a rootstock for lemons in California.
This hybrid, named C. macrophylla by Wester is sometimes cultivated in Cebu, Philippine Islands. It has large leaves, with the blades 12 to 14 cm long and 6 to 8 cm wide, with much smaller, subtriangular, short-winged petioles, measuring up to 3.5 cm wide near the top. The fruits are very large, 8.5 to 10 cm in diameter, subglobose to oblong, more or less narrowed at the base, with a rough, transversely-corrugated, but rather thin skin. The fruit has 13 to 16 segments and rather dry, sour pulp, considered inedible even by the natives.

This information is from
http://users.kymp.net/citruspages/papedas.html#macrophylla

The Alemow I have here grown from C.macrophylla rootstock seeds would pass as a lemon, apart from the bigger size and the rough warty skin. There is a very slight non lemon flavor in the juice, a bit like lime/hystrix, so no problem for me. The seedlings are highly true to type, look like lime/ lemon/citron.
The other Cebu name for the fruit is "colo". I asked a Filipino neighbor about it, the colo fruit is cooked whole and eaten,( i forgot if boiled or on the coals).