Agar. Agar or agar-agar is a gelatinous substance derived by boiling a polysaccharide in red algae, where it accumulates in the cell walls of agarophyte and serves as the primary structural support for the algae's cell walls.gar. Agar or agar-agar is a gelatinous substance derived by boiling a polysaccharide in red algae, where it accumulates in the cell walls of agarophyte and serves as the primary structural support for the algae's cell walls.
Photo by Lisa Powers. Description: Typical timber rattlesnakes measure anywhere from 36-58 inches (91-147 cm) in length with Klauber (1956) reporting the largest timber rattlesnake ever recorded to be 74  inches (189.23 cm) collected near New Orleans, LA in the 1940s. Timber rattlesnakes are the 2nd largest venomous snake found in the eastern United States.
Arizona Ridge-nosed Rattlesnake is official state reptile; One of four rattlesnake species with special protection in Arizona; Western Diamond-backed Rattlesnake (Crotalus atrox) Up to 66 long; Largest rattlesnake in the West; Responsible for more bites and deaths to humans than any other rattlesnake species in U.S. Black-tailed Rattlesnake (Crotalus molossus) Up to 48 long