Echinocactus grusonii (Kin-shachi)
Echinocactus grusonii is a typical barrel cactus which is highly evolved.  It takes a few dozen years to be 90 to 180 cm in diameter.  Initially, it is spherical and becomes barrel-shaped after maturity.
The ribs running in parallel have oval areoles where the large yellow spines project out.  The leaf changes into the spine which is called a needle leaf; the areole, where the needle leaves project from, is a short branch.  The normal branch, "long branch", grows inter-nodes to have dispersed leaves, but the "short branch" does not grow inter-nodes and has fascicled leaves.  Echinocactus grusonii has yellow hairs at its top to protect the growth point, and yellow daytime-flowers bloom around its edge.  It requires 20 to 30 years for flowering.
Echinocactus grusonii can be propagated from seed, and also makes a child stock at its side near the ground to propagate; see the second and sixth photos.
Classification: Cactaceae Echinocactus
Scientific name: Echinocactus grusonii
Japanese name: Kin-shachi
English Name: ---
Native locality: Queretaro de Arteaga, Mexico
Ecological description: ---
RDB : Critically endangered (IUCN, 2001)
Planting place: Plant of South and Central America Greenhouse
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