Were you to walk into Dana Janssen’s tidy gray bungalow with the green chimney in Northeast Portland, the first thing you might notice are the houseplants. They’re impossible, after all, not to notice. They arc from shady corners into sunlit windows. They line windowsills and lord on countertops. They dominate the bathroom’s humid climes. Ask for a plant count, and you get only a laugh. The second thing you would surely notice — because Janssen, the longtime Akron/Family drummer who has been making kaleidoscopic pop as Dana Buoy for a decade, would surely show you — are the drums that anchor the finished basement studio. He and his partner, Jamie (the place’s real green thumb, mind you), bought the house three years ago. It was the first time Janssen had room for his primary instrument in the nine years that had passed since he arrived in Portland. Downstairs, he will play you something quick and then beam, like a proud parent of his adult space.