Cryptantha minima Rydberg
Bull. Torrey Bot. Club 28: 31. 1901

[Cryptantha s.s. HOME]

Cryp-tán-tha mí-ni-ma
of diminutive size
Synonym (Taxonomic):

Eritrichium hispidum Buckley, Proc. Acad. Nat. Sci. Philadelphia 462. 1861 (1862)
[not Eritrichium hispidum Phil., Fl. Atacam. 38. 1860 = Cryptantha hispida (Phil.) Reiche]

Rydberg & Vreeland 5697, 31 May 1900, USA: Colorado, Huerfano Co., Cucharas River, above La Veta
HOLOTYPE: NY 00335178
Diagnostic features:

Cryptantha minima is distinctive in having bracteate flowers, sepals with thickened midribs, and four, heteromorphic nutlets in which the odd/large (adaxial) nutlet is finely and densely papillate and the three consimilar nutlets are papillate and coarsely tuberculate, both types with an attachment scar wide from middle to base, often excavated.


Kartesz, J.T., The Biota of North America Program (BONAP). 2012. North American Plant Atlas (
Chapel Hill, N.C. [maps generated from Kartesz, J.T. 2010. Floristic Synthesis of North America, Version 1.0. Biota of North America Program (BONAP). (in press)].


Cryptantha minima Rydberg
Rydberg & Vreeland 5697, 31 May 1900 (NY 00335178)
USA: Colorado, Huerfano Co., Cucharas River, above La Veta

[Click images for higher resolution view.]

Large/Odd Nutlet, dorsal view

Large/Odd Nutlet, ventral view

Large/Odd Nutlet, side view

Consimilar Nutlet, dorsal view

Consimilar Nutlet, ventral view

Consimilar Nutlet, side view
Cryptantha minima Rydberg
(POM 369263)

Cryptantha minima Rydberg
R.B. Kelley 2248, 16 July 2013 (SDSU 20629)
USA: Montana, Carbon County
45.13682, -108.64412, 4970 feet (1515 meters)

Cryptantha minima Rydberg
Cain 1806, 19 June 2013 (SDSU 20676)
USA: Montana, Custer County
46.0761, -105.8616, 2672 feet (814 meters)