TRIANTHINA  Rose, 1909   (engl./ fr.)

The plant Rose described as E. trianthina was collected by C.A. Purpus near the Rio Tolantongo in Hidalgo in 1904, and the description was published in Contr. U.S. Natl. Herb. 12: 439, 1909.

The type is Rose 954 ( US 399673). 

The problem :

Rose's description does not agree with the (pressed) plant of the  type specimen and it does also not agree with the photo of a living plant on the type specimen. Moreover the living plant does not agree with the type specimen. That means we have 

- a type specimen, too poor to give a correct idea of the living plant. 

- the photo of a living plant which does not agree with the type specimen US 399673.

- Rose's description which does not agree with either the type specimen or the plant on the photo.

As is well known, the name belongs to the type, i.e. US 399673 is E. trianthina. What the plant on the photo and the plant of Rose's description are, is impossible to know. In any case Rose's description is of no use when it comes to identifying the correct E. trianthina.

See also p. 204 in Revision of Walther's monogragh Echeveria, 1972.

Whether the photos below represent E. trianthina is impossible to know because the type specimen is too poor to permit a positive identification of this species.