please tell me what it is??? i adopted this cacti this summer when it was really hot in ohio. he was very healthy and loved it on my porch and even sprouted green leaflets on the ends of his arms. not much rain here over the summer tho a little and morning dew. when i brought him indoors early october, i put him beside a window for light. he wasn't there for maybe 3-4 weeks and dropped his leaflets. i've since moved him into the 'sun' room with skylites and gave him his first real watering. now his 'arms' are starting to shrivel up. as you can tell, i know nothing of cacti and don't want to try this, try that and guess at what to do. please educate me. i'd hate to lose this wise old one. :( sad face. tina.