rc, there are only a few native species of bamboo in the u.s. Bamboo (A. gigantica), river cane (A. tecta), and hill cane ( A. appalachian?). the last is new and still debated. to fully differentiate between the species of bamboo can sometimes take a PhD. in botany, seriously! for example, the only definite way to tell the difference between gigantica and tecta, is to dig up a rhizome and cut into it. one has a pith, the other doesn't. people brought dozens of different species of bamboo over in the early 1900's for decoration. about the same time they brought kudzu, we can see how that worked out. river cane is what most indian tribes used. the only thing i have against river cane, other than being the hardest to straighten, is to get an arrow that will spine around 55#, the nock end will be around 1/4". i've used 1/4" plastic nocks, but these will sometimes break if using a bow over 55#. i've had better luck using antler or horn nocks on river cane. if you take your time, you can drill the nock end out and slip a carbon shaft nock in river cane. japanese arrow bamboo is the most elegant and most beautiful of the arrow bamboo. guess that's why the samurai used it. sasa is as tough as steel and will almost straighten itself when heated. it has the thickest walls and will take the most abuse. it has a splotched look which some people don't like, it think it gives the arrow some character. with a sasa arrow, if you can't kill it with the pointy end, you can use the arrow to beat it to death. i have a pair of sasa arrows i'm planning on entering in the 3 river contest that i'll post a pic of on here later tonight.