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streptocarpus and other gesneriads

Gesneriads with Tubers
S i n n i n g i a
Sinningia is a genus of flowering plants in the family Gesneriaceae. There are about 65 species of tuberous perennial herbs, all occurring in Central America and South America, with the greatest concentration of species occurring in southern Brazil.
The best-known species, Sinningia speciosa, was originally introduced to cultivation as Gloxinia speciosa and is still commonly known to gardeners and in the horticultural trade as "gloxinia". The true genus Gloxinia is distinguished by having scaly rhizomes rather than tubers.
Sinningia species often grow on rocks or cliffs and most are pollinated by hummingbirds or bees but Sinningia brasiliensis is bat-pollinated, and Sinningia tubiflora, with large, powerfully fragrant tubular white flowers, is apparently pollinated by sphinx moths. Most of the species have large, brightly colored flowers because of this, numerous species and a large number of hybrids and cultivars are cultivated as houseplants. Some species with particularly large tubers are cultivated by cactus and succulent enthusiasts as caudiciforms. One such example is Sinningia leucotricha, often listed under the older name Rechsteineria leucotricha and dubbed "Brazilian edelweiss" for its covering of silvery, silky hairs. Other species with large tubers are Sinningia iarae, Sinningia lineata, and Sinningia macropoda.
The Brazilian genera Paliavana and Vanhouttea, consisting of shrubby plants without tubers, are closely related to Sinningia and recent morphological and molecular analyses (Boggan 1991, Perret et al. 2003) suggest that these genera are, in fact, nontuberous Sinningia species. All three genera were included in tribe Gloxinieae in the classification system of Hans Wiehler but are now recognized in their own tribe, Sinningieae.
(From Wikipedia, the free encyclopedia)
 plants from my collection:
                         S. conspicua                                  ???                                             S. leucotricha
            S. Amanda´s Penny                       S. Chippewa Grace                              S. Delta Fox
       S. Heartland´s Double Dilly           S.  White Sprite (micro)            S. Ozark Sentimental Journey
           S. Scarlet Sunset                           S. Danielle                                       S. Spellbound
                        Spanish Flirt                                          
S. Amanda´s Penny - Pinkish-orange flowers with creamy white on the lower petals.
    Medium green foliage.
S. Chippewa Grace -
S. conspicua - A medium sized upright plant with many pale yellow pouched shaped flowers.
    The flowers have a sweet lemon scent. The whole plant is covered in fine white hairs.
S. Danielle - Double lavender flowers with white highlights. Medium green foliage.
 S. Delta Fox -  
S. Flair - Eye catching blue-purple and white blooms with heavy dots and spotting. Dark bushy foliage.
S. Heartland´s Double Dilly -
S. leucotricha - The long white hairs that cover the leaves give them an attractive silver furry
   appearance. The flowers are long, narrow and tubular, orange in colour.
S. Ozark Sentimental Journey -
S. Scarlet Sunset -
S. Spanish Flirt -
S. Spellbound -
S.  White Sprite (micro) -