Astrophytum asterias var. nudum f. rubra
Astrophytum asterias var. nudum f. rubra
Family
Cactaceae
Genus
Species
Astrophytum asterias var. nudum f. rubra
Author
hort.
Chinese genus
星球属
Chinese name
-
Accepted
DescriptionEdit description
Habit
It is usually solitary unless damaged.
Forma Rubra
The red schizochromic form (Astrophytum asterias var. nudum f. rubraSN|1464]]SN|26115]]) has bright orange-red stems due to the absence (or reduced production) of chlorophyll pigments
Flowers
Apical, diurnal, radial, 3-5 cm long, 5-7(-9) cm in diameter opening widely, yellow with orange/red throats.
Blooming Season
Spring to summer and each flower lasts for one or two days only.
Spines
Not any.
Ribs
The stem is typically divided by very narrow but distinct vertical grooves into 8 broad ribs. The ribs are very low, almost flat on top, forming triangular sections with no cross-grooves.
Stem
bright orange to dark red, much depressed, disc-shaped to low dome-shaped (Only in cultivation plants may have a spherical till columnar shape, mature plants 2-7 cm tall, 5-16 cm broad, smooth completely flake free (without the minuscule tufts of bright white hairy scales).
Areoles
Round, prominent, 3-12 mm in diameters, forming a line up to the centre of each rib, felted to hairy, white till straw-coloured, then grey. Normally 3 to 10 mm apart.