Pinguicula immaculata is easy to underestimate because of its size. In its rocky habitat, flowers may be easier to notice than the resting plants beneath them. The leaf stalks, flower proportions and seasonal rosette provide a more useful identity than the general impression of a tiny white-flowered butterwort.
Name and botanical history
Pinguicula immaculata Zamudio & Lux is retained in Kew's accepted species list. The original account appeared in 1992 and described a gypsum-associated species from Nuevo León, Mexico. World Flora Online links that publication to the accepted name. Kew genus checklist; Publication record.
Identification in miniature
The description reproduced by A World of Pinguicula distinguishes thick, narrow winter leaves from summer leaves with an elliptical blade and a conspicuous stalk. The summer blades are described as 4–9 mm long, with stalks of similar length. White flowers have a yellow-green basal marking on the lower lip, whose middle lobe is much longer than the lateral lobes. Botanical description.
Those measurements explain why a scale is essential in identification photographs. Do not flatten a leaf to make it easier to measure, or detach a flower from a very small plant merely for a picture. A clear side view can reveal the spur and lobe proportions while preserving the plant.
Gypsum habitat and hidden rosettes
The species account places documented plants on gypsum cliffs and slopes in Nuevo León. Fernando Rivadavia's account of a December 2008 visit describes white flowers emerging from a gorge wall, with resting rosettes concealed in the gypsum. Young fruits were already present. His suggestion that flowering could start earlier than older records indicated was an inference from that visit, not continuous monitoring through the season. Habitat account; Field observations.
For a cultivated plant, that is a reason to inspect carefully before declaring a shrunken seasonal rosette dead. It is not a reason to bury a healthy crown artificially. The depth of a wild rosette in eroding mineral material does not provide a potting-depth instruction.
Care and the gypsum question
Eric Partrat reports a mineral medium, a succulent resting phase and reduced seasonal watering. He added gypsum pieces but explicitly did not establish whether that addition was beneficial. A habitat association and an untested amendment should remain separate claims. Cultivation observations.
If an accession arrives established in a successful mix, retain that baseline before testing a different substrate. In a comparative trial, use duplicates and record the exact amendment, watering and outcome. Without those controls, improved or reduced growth cannot confidently be assigned to gypsum alone.
The ICPS Mexican-butterwort guide provides broader advice on adjusting water and seasonal light to changing leaf form. Its group-level framework does not supply a species-specific recipe for this miniature. General seasonal framework.
Propagation and collection records
The specialist account reports propagation from succulent leaves with their bases intact. Keep propagation attempts modest on a small parent, and retain the accession label with both parent and resulting plants. Propagation account.
Record the transition into the resting rosette, flower appearance and renewal of stalked summer leaves. Together these observations distinguish normal seasonality from a sudden decline. Exact provenance, authenticated photographs and image rights, and a documented Nano Nursery growing history remain outstanding for release.
