Taxa described in 1951

Zeugandra is a genus of plants in the family Campanulaceae. It contains two known species, both endemic to Iran.

Hypocenomyce is a genus of lichen-forming fungi in the family Ophioparmaceae. Species in the genus grow on bark and on wood, especially on burned tree stumps and trunks in coniferous forest. Hypocenomyce lichens are widely distributed in the northern hemisphere.

Cashiella is a genus of fungi in the family Dermateaceae. The genus contains four species. Cashiella, circumscribed in 1951 by Franz Petrak, is named in honor of American mycologist Edith Katherine Cash.

Sigmocheir is a genus of millipede in family Xystodesmidae. The species of this genus are endemic to California where they are found in foothills of the Sierra Nevada mountains. Individuals of the genus can be found from Placer County, south to the northern portion of Tulare County.

Ceratospermopsis is a genus of fungi in the family Meliolaceae. It was circumscribed by Brazilian mycologist Augusto Chaves Batista in 1951.