Blumenbachia sect. Blumenbachia

Henning, Tilo, Oliveira, Samuel, Schlindwein, Clemens & Weigend, Maximilian, 2015, A new, narrowly endemic species of Blumenbachia (Loasaceae subfam. Loasoideae) from Brazil, Phytotaxa 236 (2), pp. 196-200 : 197

Key to the species of Blumenbachia sect. Blumenbachia

Fruits subglobose, externally with 10 deep grooves falling into 5 narrow and 5 wide segments at maturity, capsule walls thick and succulent, spongy when dry; flowers single, axillary, prophylls narrowly ovate to linear and adnate to the base of the flower, all internodes +/- equally long ( Blumenbachia sect. Blumenbachia ).

1 Flowers subsessile, pedicel much shorter than petiole of subtending leaf; petals half-spreading (<180°)......................... B. latifolia

1* Pedicel equalling or longer than petiole of subtending leaf; petals spreading to half-reflexed (>180°)............................................2

2 Plant decumbent to trailing; leaves trifoliolate, all leaves usually shorter than 4 cm .................................................. B. catarinensis

2* Plant erect from decumbent base, rarely trailing; at least lower leaves palmatifid with serrate lobes, or pinnatisect, longer than 4 cm .......................................................................................................................................................................................................3

3 Leaves pinnatisect, sepals narrowly ovate, entire ............................................................................................................... B. insignis

3* Leaves palmatifid, sepals widely ovate to deltate, margin serrate.....................................................................................................4

4 Leaf margins lobulate to coarsly serrate, lateral lobes diverging ≤45° from central lobe, petals ≥ 10 mm long, capsules spherical... ......................................................................................................................................................................................... B. hieronymi

4* Leaf margins irregularly and shallowly serrate, lateral lobes diverging>45° to central lobe, petals <10 mm long, capsules ovoidal ............................................................................................................................................................................ B. amana sp. nov.