Acanthocephala graessneri – (K.Schum.) Guiggi 2012
- – Echinocactus graessneri K. Schumann 1903,
– Malacocarpus graessneri (K. Schumann) Britton & Rose 1922,
– Notocactus graessneri (K. Schumann) A. Berger 1929,
– Brasilicactus graessneri (K. Schumann) Backeberg 1942,
– Parodia graessneri (K. Schumann) F. H. Brandt 1982,
– Parodia haselbergii subsp. graessneri (K. Schumann) Hofacker & P. J. Braun 1998,
Plants solitary, globose, bright to gray-green, somewhat depressed apically, 7-8 cm (2.8-3.1 in) in diameter. Ribs 30 or more, somewhat tuberculate, spirally arranged. Areoles white. Central spines 3-5, yellowish, 10-15 mm (0.4-0.6 in) long. Radial spines 20 – 60 or more, needle-like, almost bristly, yellowish white, to 10 mm (0.4 in) long. Flowers yellowish to yellowish green, 2.5-3 cm (1-1.2 in) in diameter floral tubes short or absent; pericarpels and floral tubes with small scales, wool, and bristles. Fruits not known.
Distribution: Rio Grande do Sul, Brazil.
References: Anderson E.F. - The Cactus Family