Utricularia (sect. Foliosa) Kamienski
Creators: name: Baleeiro, Paulo C.
name: Gonella, Paulo M.
name: Sano, Paulo T.
name: Jobson, Richard W.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Lentibulariaceae
Utricularia

description: Taxonomic key Utricularia sect. Foliosa
1. Corolla purple to pale pink.................................................................................................................................................................2
1´. Corolla white or yellow ....................................................................................................................................................................12
2. Calyx with papillae and/or trichomes near margin.............................................................................................................................3
2´. Calyx glabrous....................................................................................................................................................................................4
3. Corolla lower lip with white and yellow spot, spur x2> lower lip, upper lip ovate x3> than calyx ........................... U. velascoensis
3´. Corolla lower lip with only yellow spot, spur slightly larger than lower lip, upper corolla lip rounded x2> than calyx ... U. bicolor
4. Corolla lower lip base with a bilobed protruded crest with tuberculate texture, spur cylindrical with apex inflated and bilobed ...... ............................................................................................................................................................................................... U. biceps
4’. Corolla lower lip base with crest not protruded and smooth texture, spur conical tapering towards the simple apex (eventually also bilobed)...............................................................................................................................................................................................5
5. Corolla lower lip entire to shallowly 3-lobed, spur the same length or slightly larger than the lower lip, lower sepal much smaller than upper sepal, pedicel half the size of upper sepal ........................................................................................................................6
5´. Corolla lower lip deeply 3-lobed, spur usually x2> than lower lip, both sepals similar in size, pedicel at least x2> the size of upper sepal....................................................................................................................................................................................................7
6. Inflorescence 240–750 mm long, corolla 10–25 mm long.................................................................................................. U. tricolor
6´. Inflorescence 40–80 mm long, corolla up to 8 mm long.............................................................................................. U. roraimensis
7. Corolla lower lip same length or smaller than upper lip; leaves linear........................................................................... U. lindmanii
7´. Corolla lower lip much larger than the upper lip, leaves spathulate to almost circular .....................................................................8
8. Inflorescence peduncle robust (ca. 1mm wide), leaves numerous in a rosette...................................................................................9
8´. Inflorescence peduncle not robust (<0.8mm), leaves absent or usually not forming a rosette ........................................................10
9. Corolla minutely papillose, lower lip shallowly 3-lobed, leaves mostly circular ........................................................... U. tridentata
9`. Corolla glabrous, lower lip distinctively 3-lobed, leaves mostly spathulate............................................................... U. amethystina
10. Corolla purple with white and yellow spot, spur glabrous, leaves absent or spathulate to almost circular from a short attenuate base................................................................................................................................................................................... U. damazioi
10’. Corolla pale pink with white and yellow spot, spur with trichomes or stipitate papillose, leaves obovate to circular or almost reniform from a short or long attenuate base....................................................................................................................................11
11. Calyx with papillae and/or trichomes at least near the margin; leaves mostly absent, or obovate, reniform, to almost circular ........ ............................................................................................................................................................................................. U. hirtella
11’. Calyx glabrous; leaves circular or reinforms from a long attenuate base ........................................................................... U. lunaris
12. Calyx with papillae and/or trichomes at least near the margin............................................................................................ U. hirtella
12´. Calyx glabrous..................................................................................................................................................................................13
13. Corolla white ............................................................................................................................................................... U. amethystina
13´. Corolla yellow ..................................................................................................................................................................................14
14. Corolla pale yellow up to 10 mm long, traps monomorphic............................................................................................. U. trinervia
14´. Corolla bright yellow 15–25 mm long, traps dimorphic ..................................................................................................................15
15. Straight spur up to x2> than lower lip ........................................................................................................................... U. pantaneira
15´. Curved spur at least x3> than lower lip....................................................................................................................... U. chapadensis
description: Published as part of Baleeiro, Paulo C., Gonella, Paulo M., Sano, Paulo T. & Jobson, Richard W., 2022, Unveiling Utricularia amethystina's true colours: a taxonomic revision of one of the largest species complexes (U. sect. Foliosa, Lentibulariaceae), pp. 29-54 in Phytotaxa 576 (1) on page 33, DOI: 10.11646/phytotaxa.576.1.2, http://zenodo.org/record/7440860