Forms and collectors' names

An older name associated with long, curved, yellow or golden spines. In the archived comparison, plants had few body hairs and flowers with orange or red centres. POWO treats the…

A historical name for plants with strong, thick spines. The archived comparison also linked it to flowers without a distinctly red throat. CactusDNA describes heavily spined plants from…

In the archived description, a smaller form with thin, flexible spines often concealing the apex. Body hairs are relatively few. Corresponding older names with minus are synonyms of A.…

A historical name associated with a very dense covering of pale body hairs. Older descriptions differ over spine thickness and flexibility. The atlas preserves this discrepancy in editorial…

Also formerly raised to species rank as Astrophytum senile. The archive describes very long, flexible, dark spines and a sparsely hairy body. Flowers usually have a coloured centre. It is…

A horticultural name distinguished in the author's materials from the botanical epithet crassispinum. The archive describes plants with paler, thinner, strongly twisted spines and yellow…

The archived profile uses major and minor for differences in size and spines. Their spelling and authorship have not been confirmed as distinct accepted taxa. Minor may be confused with…

Monterrey comes from a historical collection list. It is retained as part of the label, with the identifier 08-06-11/141 and a historical count of two plants. The document does not…

The term concerns plants almost lacking white hairs on the stem surface. Areoles remain present. The 2020 study showed continuity between bare, partly hairy and densely hairy plants. The…

An older name associated with a slender stem elongating early. The archive also contains columnaris and minima. In POWO, columnare names are synonyms within subsp. myriostigma. Columnar…

In 2021, Montanucci and Kleszewski recognised tulense through a combination of stem, flower and seed features. In their material, plants were more slender and taller, and flowers usually…

A historical name applied to Tamaulipas populations, including the Jaumave valley. The 2019 nomenclatural paper discusses priority of quadricostatum. POWO treats tamaulipense combinations…