Pyrrhocactus deherdtianus
Cact. Succ. J. (Los Angeles) 55(3): 123. 1983
Family
Cactaceae
Genus
Species
Pyrrhocactus deherdtianus
Author
(Backeb.) Katt.
Chinese genus
-
Chinese name
-
Accepted
DescriptionEdit description
Habit
It is a tiny geophytic cactus rising barely above ground level (in habitat), usually solitary or sometime branching.
Seeds
Round black.
Roots
Fibrous, arising from a large taproot which is narrowed into a necks where joining the stems.
Flowers
Diurnal, 3-4 cm long and broad, closely packed apically from young areoles, funnel-form, the colour is creamy yellow to reddish often with red/brownish midveins. Pericarpel and floral tube with bracts, wool and sparsely bristly.
Blooming Season
Flowers are produced in early summer and remain open for about four days.
Spines
About 7 stiff, needle-like, straight or more or less curved and not easily distinguished as centrals or radials, creamy white, brown or black and darker at the tips, turning grey as they ages.
Ribs
About 12, noticeably tubercled with pronounced chinlike protrusions.
Stem
Spherical to somewhat clavate in cultivation, flattened at the apex, up to 8 cm tall (but usually less than 4 cm) and 4-5 cm in diameter, dull olive-green, dark maroon/mauve to blackish.
Fruits
Oval, to 1,5 cm long, red, fleshy, thin walled and splitting open at maturity by basal pores.
Areoles
Elongate, with yellowish or white felt.