Nesrin: 3:31pm Sep 29, 2008: I think "a flash in the pan" works perfectly well here.
Suzan Hamer: 3:53pm Sep 29, 2008: I agree with Nesrin; "flash in the pan" was my first reaction.
"Meaning: Something which disappoints by failing to deliver anything of value, despite a showy beginning.
http://www.phrases.org.uk/meanings/flash-in-the-pan.htmlLia Fail: 6:27pm Sep 29, 2008: flash in the pan - Just after I posted this query, I did check the meaning of flash in the pan and found that it did indeed mean exactly what I intended. Thanks to Nesrin and Suzan for confirming this. However, I also like transient and ephemeral and will consider these also.
Gary D: 2:37am Sep 30, 2008: here is a "day Lilly" Very common flower.
NancyLynn: 2:59am Sep 30, 2008: but the daylily flowers for weeks.