Arthrocereus densiaculeatus
Städtische Sukkulentensammlung Zürich, Kat. Kult. Stehenden Art., ed. 2 ed. 2 36. 1967
Family
Cactaceae
Genus
Species
Arthrocereus densiaculeatus
Author
(Backeb.) Krainz
Chinese genus
关节柱属
Chinese name
-
Primary
Accepted
DescriptionEdit description
Habit
It is a low growing cylindrical cactus species sprawling and spreading from its base and half-lying on the ground.
Description
Haageocereus lanugispinusSN|31691]]SN|3862]] is a very rare and poorly known cactus that produces finger sized, sprawling stems offsetting from the base. The peculiarity of this plant is the nice fine spination. It seems that there is only ONE clone propagated in collections worldwide!
Taxonomy
According to the “The New Cactus Lexicon" Haageocereus lanugispinusSN|31691]]SN|3862]] is a synonym of Haageocereus tenuisSN|3862]]SN|31691]]. In effect the seeds of tenuis are very similar to those of lanugispinus, but in culture, there are a lot of differences, in particular the spination in tenuis is much less dense. Both are beautiful anyway.
Note
This plant seems to be very rarely seen in its "normal" form, as it is almost always seen the cristate form. However the crested form sometimes throws off normal stems, but they proved to be particularly difficult to root, for this reason the few plants found in specialized cactus collections are - usually – grafted.
Flowers
White, 5 cm long.
Spines
30-40, most unusual dense, short, unequal, needle-like, glassy white, 3-5 mm long, which detach very easily. As in Haageocereus tenuisSN|3862]]SN|31691]] the spines are minutely plumose.
Ribs
13-14, 1.5-2 mm high.
Stem
Cylindrical, 10-20 cm long, 1.2 2 cm in diameter, either upright or prostrate, eventually clumping near the base of the plant, green, somewhat hidden under a dense cover of glassy white spines.