Sinningia minima

This recently discovered species is the smallest sinningia yet.

This plant is grown by Hung Nguyen.  It bloomed from seed in about five months.  Photo January 2018.

This species was discovered in Pará state.  This state is in northern Brazil, far from most other members of the Sinningia tribe, which are found mainly in the southern part of the country. Pará state includes the mouth of the Amazon river, and is the second largest state in Brazil.  The Serra dos Carajás, where Sinningia minima was discovered, is a mountain range in southeastern Pará.  This range is home to a lot of mining, especially iron, but also other metals.  Such activity could endanger the habitat of this new species.

Sinningia minima was found on iron-bearing rock.  Whether this means it won't grow well without iron in its soil has yet to be determined.



Although other gesneriads (such as drymonias) are found in Pará state, this species is the only representative of the sinningia tribe found there so far.  The Gesneriad Checklist does not show any sinningias, paliavanas, or vanhoutteas in Pará.  This means that Sinningia minima is isolated, far from its nearest relatives.

According to the publication of this species (see link below), the corolla is shorter than those of the other micro species, and also has a different shape.  Instead of the narrow tube with flaring lobes, this species has a wider cup-shaped tube, also with flaring lobes.  The color pattern is different too.  The base color is "lilac", a sort of pastel purple.  The lobe margins have this color, while the central area toward the throat of the tube is white.  This species shares with Sinningia concinna the presence of dots in the corolla throat, a feature absent from Sinningia pusilla and Sinningia muscicola. Compared to those of Sinningia concinna, the dots of Sinningia minima are larger, fewer, and more reddish.

Feature table for Sinningia minima

Plant Description

Growth Indeterminate
Habit Low-growing basal rosette
Leaves Green
Dormancy ?

Flowering

Inflorescence Axillary cyme
Season Probably not seasonal.
Corolla Tubular, wider and shorter than other micro species.
Stamens This species has only two fertile stamens. All other known sinningia species have four. The reduction in stamen number may be an adaptation to small size.
Hving only two fertile stamens is not uncommon in Eastern Hemisphere gesnerias (such as Primulina, but in the Western Hemisphere is found only in Sarmienta.

Horticultural aspects

From seed Hung Nguyen got flowers in about five months.
Hardiness Unknown
Recommended? Yet to be determined. It's attractive but may be difficult to grow.

Botany

Taxonomic group Araujo and Chautems, based on information from Mathieu Perret, indicate that this species belongs along with the other micros in the micro group of the Corytholoma clade.

External Link

Mauro Peixoto's Brazil Plants website has a page with several pictures.

Publication

Sinningia minima was published by Araujo and Chautems in 2015.