Peruvianus
Rosei 1
Partially documentedRosei 1 is a seedling selection with two things going for it: short spines and an unusually strong blue-grey bloom. It came from seed raised by the Field family, and one member of that family split the results into two numbered selections, of which this is the first. It is now propagated only from . The older published name Cereus rosei is thought to commemorate a well-known American botanist, though the taxonomy here is quoted, not settled.Reported, but not confirmed.
- short spines
- very blue
- cutting-grown
At a glance
Species
Parents
No source names a mother or a father for this one.
Origin
no source says whether it is seed-grown or a cutting line
In the yard
Family line
No source in this library records a confirmed cross for Rosei 1, and no other entry here names it as a parent. What the record does hold is below.
Raised from seed by one family and then selected; the individual parent plants are not named.Reported by one source, and not corroborated anywhere else.
The longer version
Ralph Field separated the results into two selections, numbered 1 and 2.Reported by 2 independent sources; we have not seen it ourselves.
It is now kept going clonally from cuttings rather than from seed.Too little stands behind this for us to confirm it.
The older botanical name rosei, first published as Cereus rosei, is thought to honour the American botanist Joseph Nelson Rose.Too little stands behind this for us to confirm it.
A specialist reference places both numbered selections in the Fields collection in Victoria, Australia, which reached the country through Mr Field's backing of a South American collecting expedition.Reported, but not confirmed.
A Californian nursery selling it names the source garden in full and puts it in Australia, and describes the plant the way both other sources do — as the classic blue .Too little stands behind this for us to confirm it.The whole entry above rests on a single quoted text with no named author or date, so an independent voice on where the seed came from is worth more here than another description would be.Reported, but not confirmed.
Where the name comes from
The plant came out of seed raised by the Field family.Reported by 2 independent sources; we have not seen it ourselves.
Character
Not documented yet.
- nearly smooth to heavily spined: this one leans towards nearly smooth, read from the spines line below.
Not documented yet.
- Skin
- An exceptionally blue, distinctive enough to be the selection's main point.One source states this, and our house botanist has checked it. Strongly glaucous blue stems occur in this genus and are a plausible basis for selecting a plant.
- Spines
- Notably short.
What the sources say
The whole entry rests on a single quoted source text with no named author or date, which the wiki page itself flags. The species is given as an peruviana with Cereus rosei as an older name, and the wiki's own species guide warns that Trichocereus naming is contested and repeatedly revised.Too little stands behind this for us to confirm it.Two names on the wiki page needed correcting against the standing index. The published combination under Echinopsis is peruviana, not peruvianus, which does not agree in gender under that genus; and no combination Trichocereus rosei exists at all — the older published name is Cereus rosei Werdermann, 1931.Reported by one source, and not corroborated anywhere else.
Related names
Keep exploring
Cultivar histories in this hobby are passed between growers; where sources disagree we say so rather than pick a side.