Boho Smock

What is the name of the technique used to?
do this to fabric at the tops of sundresses?http://cgi.ebay.ca/LONG-FULL-SMOCK-DRESS-Maxi-Boho-BritishRacing-Green-L_W0QQitemZ190362104565QQcmdZViewItemQQptZUS_CSA_WC_Dresses?hash=item2c527732f5
Is this something that can only be done with a machine, or is there a way to do it by hand?
Thanks.
that's smocking. it can be done by hand but would be very time consuming. I'd stick with machine.

