Etymology: The specific epithet honors Leon Diguet, a
French explorer who was investigating pearl fisheries on Santa Catalina
Island in the Gulf of California.
F. diguetii is a
spectacular cactus that grows up to 4 m tall
and are probably the largest and most spectacular Ferocactus. This
species is valued as one of the best mother plant to obtain
beautiful variegated hybrids. These hybrids are particularly priced by
impassioned because they will form with time huge and very showy
Massive, dull bluish-green with white,
cream or yellow variegation, globular flattened in juvenile specimens,
then columnar. The usual height of this species is to 2 meters, but some
specimens can reach the 4 m of eight. and 60-100 cm in diameter.
tuberculate, vertical, straight or wavy in moribund specimens, up to 3
cm tall. Mature plants have 25 to 35 ribs.
Areoles: Elongated, 1 x
2 cm wide, with short tan wool which turn chalky-white/grey and finally
erodes away in age.
Spines: 4 to 8 spines of which one
central (often up to 10 in juvenile specimens), clear yellow, cream-orangish,
reddish or brownish, almost all alike, subulated, not ringed or hooked,
slightly curved outward, up to 7 cm long.
Flowers: Fiery reddish
to orange, funnelform are about 4 cm long and wide. Floral tube with
fimbriate scales on ovary, inner perianth segment, oblanceolated, up to
2 cm long, 8 mm wide, dark red with yellowing margins, external perianth
segments brownish-yellow. Stamens basally yellow fading red toward the
tips, style orangish/red up to 18 mm long with longitudinal ridges
continuing in stigma lobes, this are yellow up to 5-10 mm long.
Blooming season: Flowers
from March to May.