The peculiarity of
Echinocereus waldeisii is that it forms only a single
out in the age, but not in the same extent as the similar species E.
tamaulipensis. The stems are clambering through the adjacent
vegetation and arise from a tuberous, dahlia-like root-stock.
Stem: Slender cylindrical, with pointed growing tips, dark
blue-green to purplish o brownish 60-120 cm long about 2 cm in diameter.
Ribs: Flat, without tubercles.
Central spine: One, pointed toward the stems tip, slightly
flattened, dark reddish, up to 10 mm long.
Radial spines: 8-16, thin, bristle-like, whitish or grayish, with
dark tips, up to 5mm long.
Flowers: Terminal or borne near the tips of older stems, narrowly
funnelform that often fail to open completely, up to 6cm long and 4 cm
Fruits: ovoid, dark green to brown, indehisent, with persistent
spines and wool.
Notes: The Reason of the
species status of E. waleisii is that E.
waldeisii - in contrast to E. tamaulipensis - form
storage organ in each root branch developing from the central
stalk reminding the dahlia
tubers. Each plant has up to 8 slender tubers that measure 20 30 mm
in diameter and 80-100 mm long. In the youth they
are pale-brown and later became black-brown.
Photo of conspecific taxa, varieties, forms and cultivars of
plants belonging to the
has lots of synonyms
like many other cacti) whit several controversial varieties and subspecies
and comprises different forms):