Related: the BBC offers an interactive guide for understanding the power structures within the Iranian government.
Deborah Brown gives a horticulturalist's overview to the practical care of houseplants: pdf version, awkwardly formatted html.
Some important rethinking of libertarianism in the wake of the Republican Party is going on over at Jim Henley's blog. (It's an evolving conversation, but I'd pull out these posts, in order: One, Two, and Three. Keep reading him to see how the argument progresses.)