Ancient Web: Six Months of Christmas Cacti Filled a French Greenhouse

Part of the Ancient Web Collection.

'Christmas cactus' sounds like a plant that should flower for a week in December. One devoted grower's collection began blooming in October and had not finished by March.

Read the Schlumbergera history and taxonomy essay.

The writer photographed flowering plants through the winter of 2019–2020, then arranged the results as a chronological gallery. The accompanying essay explains why this broad range of flowering dates is unsurprising once the reader examines the ancestry of cultivated holiday cacti.

The guide distinguishes three important species. Schlumbergera orssichiana, named for Beatrix Orssich, tends to bloom comparatively early; S. truncata has sharply serrated segments and flowers in autumn; and S. russelliana has small rounded segments and later flowers. Photographs compare their stems, flower structures, and botanical habitats in the mountains of southeastern Brazil.

Even the name needed untangling

The author explains that the older name Zygocactus remains widespread in ordinary gardening discussion and search queries, even though the genus is now treated as Schlumbergera. Older filenames on the website retain the familiar word. That is an instructive web-preservation detail: a scientific name can change while the site's links remain tied to the language visitors originally used.

The essay also describes the nineteenth-century S. × buckleyi hybrids, associated with Christmas flowering, and the more complicated parentage of later cultivated varieties. The writer groups the photographed hybrids according to visible stem characteristics and their stated parentage, using codes such as T, B, TB, and EP.

The site's accompanying gallery is a collector's visual record rather than a standardized botanical monograph. Statements about species boundaries and exact flowering periods reflect the author's reading of taxonomy and their own greenhouse conditions, which may differ from plants grown elsewhere.

This is a later specialist-preservation exception, with a clearly dated 2020 project, not a claim of a 1990s web origin. Its old-fashioned linked chapters, personal observations, and dense collection of explanatory photographs make it more than a contemporary plant catalog.

Explore the illustrated taxonomy and flowering calendar.

Part of the Ancient Web Collection.