http://en.wikipedia.org/wiki/Doric_order

 In their original Greek version, Doric columns stood directly on the flat pavement (the stylobate) of a temple without a base; their vertical shafts were fluted with 20 parallel concave grooves...
The triglyphs are decoratively grooved with three vertical grooves ("tri-glyph") and represent the original wooden end-beams...

http://www.ask-aladdin.com/Temples-of-Egypt/luxortemple.html 

The 1st open court has double rows of 32 papyrus bud columns. 

 ... the Colonnade... consists of two pairs of large open papyrus columns, which are arranged to make a long processional avenue.

 http://www.touregypt.net/featurestories/columns.htm

Most of the time, the column shafts were copied in stone of supports made from plants, resembling either a trunk or a bundle of stems of smaller diameter.

The Doric corner conflict:

Spiral fluted columns in the Great Colonnade at Apamea in Syria

http://en.wikipedia.org/wiki/Fluting_%28architecture%29

http://www.nature.com/nature/journal/v137/n3457/abs/137180b0.html

http://www.historyforkids.org/learn/greeks/architecture/fluted.htm

The Greeks probably started this idea because their earliest columns were made out of wooden tree trunks, and when the builders shaved the bark off the trunks it left these vertical gouges. When they began to build stone temples, they copied the gouges from the wood...

Doric columns usually had 20 flutes, while Ionic columns usually had 24 flutes.