Daniel Howard Norris (1933 – September 30, 2017) was an American botanist dedicated to the study of mosses and was a renowned expert on the California bryoflora.
After his retirement in 1991, he transferred his extensive bryological collection to the University of California, Berkeley to continue his research.
His main areas of focus were on California and Papua New Guinea, however, he made major collections on every continent other than Antarctica.
Norris described four moss genera as new to science; Bryolawtonia, Orthothuidium, Stoneobryum, and Unclejackia.
[4] He has also authored or co-authored the following new species: Anomobryum hyalinum, Amomobryum ochii, Brachymenium wabagense, Brachymenium huonii, Bryum pseudoblandum, Dicranella papua-palustris, Dicranum cutlackii, Didymodon coffeatus, Didymodon wisselii, Diphyscium chiapense, Hampeella concavifolia, Hyophila streimannii, Leptocladiella flagellaris, Macrocoma gastonyi, Merrilliobryum tanianum, Microdus friedensis, Orthotrichum kellmanii, Orthotrichum shevockii, Orthotrichum spjutii, Oxystegus crassicostatus, Plagiomnium cordatum, Powellia parvula, Rhamphidium novoguineensis, Splachnobryum limbatum, Stereophyllum dicksonii, Syrrhopodon curticancellinatus, and Trematodon papuensis.