Name and label history
The accepted name is Ariocarpus bravoanus subsp. hintonii (Stuppy & N.P.Taylor) E.F.Anderson & W.A.Fitz Maur. POWO lists A. fissuratus var. hintonii and the combination at subspecies rank within A. fissuratus as synonyms. Old labels document earlier treatments of the same plant. [2-WWW]
The genus revision compared tubercle, areole and seed structure, linking hintonii with A. bravoanus. The authors also noted variation in areole features. The subspecies was retained for its combination of features and geographical distinctiveness, rather than a single invariably developed groove. [Anderson and Fitz Maurice 1998]
Appearance and changes with age
The archived account noted a smaller stem, narrower tubercles and a different pattern of fine wrinkles compared with typical A. fissuratus. The central groove may become distinct only in older plants. Its absence in a young specimen alone does not rule out identification as hintonii. [Romulski 2006b]
Compare plant differences at similar developmental stages. The low stem and tubercle arrangement of wild plants need not match the proportions of a specimen growing vigorously on a rootstock. The archive clearly distinguished the photographed grafted plants. [Romulski 2006b]
Origin and habitat
POWO lists northern San Luis Potosí. The genus revision described sites at about 1400 m above sea level in Chihuahuan Desert vegetation. This characterises sites known to the authors of that paper. [2-WWW] [Anderson and Fitz Maurice 1998]
Flowering in collectors' accounts
Tomasz Romulski identified hintonii as an ariocarpus reaching flowering capability early in cultivation. He did not present a comparative experiment with seedling batches receiving identical care. This is a valuable collector's observation, without assigning every plant a fixed age at first flowering. [Romulski 2006b]
Caring for an adult plant
A permeable substrate and watering adjusted to drying underpin cultivation of the genus described in Polish literature. Root protection matters during repotting. The subspecies' small size supports assessment of the entire root ball when choosing a pot, beyond stem width alone. [Anonim 2006] [Romulski 2006b]
Light is increased gradually after relocation. During the cool rest, the described method uses dry conditions. Details depend on whether the plant is on a windowsill, under cover on a balcony or in a greenhouse. These situations are distinguished in the account of growing Ariocarpus in Poland. [Anonim 2006] [1-WWW]
Propagation and documentation
Sowing allows a plant to be grown from an early developmental stage, and the label should retain the full subspecies name and seed provenance. Neciu's general account describes gradual changes in moisture and light for young ariocarpus plants. This is a cultivation method for seedlings of the genus, without a separate experiment on hintonii. [Neciu 2006] [2-WWW]