Märzenbecherwald von Algersdorf, Natural monument in Kirchensittenbach, Germany.

The Märzenbecherwald von Algersdorf is a 1.5-hectare deciduous forest on a swampy eastern slope in the Sittenbach valley, about 600 metres south of Algersdorf. It holds the largest occurrence of the spring snowflake in the Nürnberger Land district, covering the brown forest floor with a white flower carpet.

The site is registered as a natural monument under the number ND-05185, a designation that protects the spring snowflake population on the swampy eastern slope. In 2019 the Bund Naturschutz purchased the 3.5-hectare area, which includes the 1.5-hectare woodland. The protection order prohibits entry between 1 February and 30 April.

The name comes from the spring snowflake, called Märzenbecher in German, which covers the brown leaf litter with white flowers. The 1.5-hectare slope wood is the largest stand of the flower in the Nürnberger Land district. Because entry is barred from 1 February to 30 April, the bloom is viewed from the trail passing the slope.

The forest is reached only on foot, via a hiking trail from Algersdorf or Dietershofen; the Fränkische Gebirgsweg runs directly past the slope wood. Entry is prohibited from 1 February to 30 April under the natural monument ordinance, so the blooming slope is viewed from the path.

The 3.5-hectare plot was bought by the Bund Naturschutz in 2019, while the protected natural monument itself covers about 1.5 hectares. A comparable snowflake wood lies near Hundsdorf in the Weißenburg-Gunzenhausen district, at Ettenstatt.