キダチアロエ (Krantz Aloe)

　キダチアロエ（木立ち蘆薈、アロエ科）。2010年12月23日、石津川のほとりで撮影。

Krantz aloe; botanical name, Aloe arborescens; family, Aloaceae. The photo was taken on December 23, 2010, at the side of Ishizu River.

From tweets of yesterday (edited by rephrasing, adding words, etc.)

Exchange of Words with Friends

[In response to Fermin Aceves's words, "#FF @tttabata great science divulgator . . ."] Oh, it was Friday yesterday. Thanks for mentioning me for #FF . Have Happy New Year's Day!

[From Fermin Aceves in reply to the above] Hehe, in Mexico, Friday (and 2010) still has 5 hours ;) Happy new year! How is 2011 going?

[In reply to the above] Weather forecast for Osaka today was "snowy," but it's fine now. We need fine weather also in economy and politics in Japan.

[From Fermin Aceves] Good luck :) We need a miracle for Mexico, maybe it comes with 2011.

Mathematicians

[In response to 高木 六玄's words, "なるほど、高木貞治が亡くなってから50年を越したんだね。あの名著の山が著作権切れになると思うと胸が熱くなるぜ"] 高木貞治が亡くなってから50年を越しましたか。大学1年生のとき、『解析概論』を愛読しました。