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We report a series of extensive photometric and spectroscopic observations ofthe luminous M31 nova M31N 2007-11d. Our photometric observations coupled withprevious measurements show that the nova took at least four days to reach peakbrightness at R~14.9 on 20 Nov 2007 UT. After reaching maximum, the time forthe nova to decline 2 and 3 magnitudes from maximum light (t_2 and t_3) was~9.5 and ~13 days, respectively, establishing that M31N 2007-11d was amoderately fast declining nova. During the nova's evolution a total of threespectra were obtained. The first spectrum was obtained one day after maximumlight (5 days post-discovery), followed by two additional spectra taken on thedecline at two and three weeks post-maximum. The initial spectrum revealsnarrow Balmer and Fe II emission with P Cygni profiles superimposed on a bluecontinuum. These data along with the spectra obtained on the subsequent declineclearly establish that M31N 2007-11d belongs to the Fe II spectroscopic class.The properties of M31N 2007-11d are discussed within the context of otherluminous novae in M31, the Galaxy, and the LMC. Overall, M31N 2007-11d appearsto be remarkably similar to Nova LMC 1991, which was another bright,slowly-rising, Fe II nova. A comparison of the available data for luminousextragalactic novae suggest that the >~4 day rise to maximum light seen in M31N2007-11d may not be unusual, and that the rise times of luminous Galacticnovae, usually assumed to be <~2 days, may have been underestimated.

M31N 2007-11d: A Slowly-Rising, Luminous Nova in M31