Friday Slide Scan #17 is from August 1971, featuring lichens from Mount Lebanon.
While the scribbled notes on the slides are not conclusive, I believe that the lichen featured above is the round one at center right in the shot below. The notes say “Mountain behind Beirut”, which would put it in the Lebanon, as opposed to the Anti-Lebanon, range; a native of the area might say “on Mount Lebanon”.
Images in the Friday Slide Scans are from 35mm slides taken between 1953 and 2003 by (in rough chronological order) Bill Bray, Jean Bray, Tim Bray, Cath Bray, and Lauren Wood; when I know exactly who took one, I’ll say; in this case, Bill Bray. Most but not all of the slides were on Kodachrome; they were digitized using a Nikon CoolScan 4000 ED scanner and cleaned up by a combination of the Nikon scanning software and PhotoShop Elements.