Xerophyte

Central Spines

One, 2-3 cm long.

Taxonomy

The first description made by Roberto Kiesling as the Monvillea kroenleinii is considered invalid because the specimen reviewed and cited in the description was not formally designated as such. Thus the combination Cereus kroenleiniiSN|7016]]SN|7016]] (R. Kiesling) PJ Braun & E. Esteves (Succulenta 74 (2)

Note

This member of the Cactaceae family was given this name in honor of Marcel Kroenlein (1928-1994), director of the Exotic Garden of Monaco from 1969 to 1993.

Flowers

Night blooming. Funnel-shaped 9-10 cm long. Perianth segments white with pink tips.

Spines

Needle-like, very thin, sharp, dark brown with yellow bases.

Ribs

4-5, forming distinct tubercles.

Stem

Long cylindrical, erect or creeping, 1-4 m long, to 2.5 cm in diameter, dark green, very glaucous, square in cross section when young, nearly round in cross section when mature.

Radial Spines

5, to 1.5 cm long, , the lowest spine being the shortest.

Areoles

Round, confluent apically, otherwise separated, with long woolly hairs.