Schwannia Endl., Gen. Plan.

de Almeida, Rafael F., de Morais, Isa L., Alves-Silva, Thais, Antonio-Domingues, Higor & Pellegrini, Marco O. O., 2024, A new classification system and taxonomic synopsis for Malpighiaceae (Malpighiales, Rosids) based on molecular phylogenetics, morphology, palynology, and chemistry, PhytoKeys 242, pp. 69-138 : 69-138

2.9. 12. Schwannia Endl., Gen. Plan. : 1058. 1840

Figs 3 P , 8 W , 9 G, M

≡ Fimbriaria A. Juss., Fl. Bras. Merid. (quarto ed.) 3 (22): 63. 1833, nom. illeg., non Stackh. (1809), nec Nees ex Steud. (1824).

Type species.

Fimbriaria elegans A. Juss. [= Schwannia mediterranea (Vell.) R. F. Almeida & M. Pell. ].

Notes.

Despite being the oldest available name for this genus, Fimbriaria A. Juss. is illegitimate for being a later homonym to Fimbriaria Stackh. ( Rhodomelaceae , Rhodophyta). This is unaffected by the posterior rejection of Fimbriaria Stackh. against Odonthalia Lyngbye . Furthermore, even if this rejection made “ Fimbriaria ” available as a generic name, Fimbriaria Nees ex Steud. ( Aytoniaceae , Marchantiophyta) still has priority over the Malpighiaceae name. Therefore, Schwannia is the earliest available name for this genus.

Schwannia comprises 14 currently accepted species (seven threatened species; Suppl. material 1) of shrubs or lianas endemic to rainforests, savannas, and seasonally dry tropical forests of Bolivia, Brazil, and Paraguay, South America ( POWO 2024). For an identification key for all species of Schwannia , see Sebastiani (2010) and Sebastiani and Mamede (2014), both under Janusia .

Figures

Figure 3. Phyllotaxis, stipules, and petioles of Malpighiaceae A branch with opposite leaves of Bronwenia megaptera B branch with decussate leaves of Verrucularina glaucophylla C branch with alternate leaves of Stigmaphyllon angustilobum D branch with verticillate leaves of Pterandra pyroidea E interpetiolar stipules of Mascagnia cordifolia F epipetiolar stipules of Byrsonima intermedia G free stipules of Hiraea hatschbachii H connate stipules of Peixotoa catarinensis I transverse section of a circular petiole J transverse section of a plane-convex petiole K transverse section of a canaliculate petiole L leaf with very reduced petiole of Byrsonima basiloba M leaf with short petiole of Banisteriopsis adenopoda N leaf with long petiole of Stigmaphyllon caatingicola O alternate glands on the petiole of Banisteriopsis membranifolia P opposite to alternate glands on the petiole of Schwannia mediterranea Q subopposite glands on the petiole of Banisteriopsis membranifolia R discoid and sessile gland of Banisteriopsis laevifolia S cupuliform and stalked glands of Banisteriopsis adenopoda (line drawings and photographs A – C, G, I – K, L – O, Q – S by R. F. Almeida; D by C. Silva, E, F, H, P by M. O. O. Pellegrini).

Figure 8. Sepals, glands, and petals of Malpighiaceae flowers A sepals with rounded apex of Hiptage benghalensis and sessile sepal gland B sepals with acute apex of Christianella multiglandulosa and sessile sepal glands C sepals with acute apex of Byrsonima gardneriana and sessile sepal glands D stalked sepal glands of Heladena multiflora E white petals of Acmanthera latifolia F pale yellow glands of Bunchosia glandulifera G yellow glands of Mcvaughia sergipana H pale green glands of Bronwenia megaptera I green glands of Camarea axillaris J yellow and deflexed petals of Byrsonima sericea K white glands of Acmanthera parviflora L pink glands of Heteropterys rubiginosa M brown glands of Amorimia pellegrinii N red glands of Niedenzuella poeppigiana O yellow and patent petals of Ptilochaeta bahiensis P oval petal limb of Galphimia gracilis Q elliptic petal limb of Heteropterys oberdanii R obovate petal limb of Bronwenia megaptera S pubescent petal surface of Diplopterys bahiana T orange-red petals of Tetrapterys phlomoides U entire margin of the petal of Heteropterys oberdanii V erose margin of the petal of Bronwenia megaptera W fimbriate margin of the petal of Schwannia schwannioides X dentate margin of the petal of Peixotoa hispidula Y glandular-fimbriate margin of the petal of Alicia anisopetala Z lilac petals of Mascagnia lilacina (A, C, F – H, I, J, L – S, U – W by R. F. Almeida; B, N, T, Y by M. O. O. Pellegrini; D by A. Francener; E by R. Goldenberg; Z by O. J. A. Ayala).

Figure 9. Androecium and gynoecium of Malpighiaceae A stamen of Banisteriopsis multifoliolata showing filament in green, anther in orange, glandular connective in blue, and pollen sacs in yellow B scanning electron micrograph of an anther of Banisteriopsis multifoliolata C SEM of a pollen grain of Banisteriopsis multifoliolata showing colpi in blue and endoaperture in red D heteromorphic stamen ring with 10 fertile stamens of Banisteriopsis multifoliolata E homomorphic stamen ring of Bronwenia megaptera with 10 fertile stamens F heteromorphic stamen ring of Peixotoa hispidula showing 5 fertile stamens and 5 staminodes in yellow G 6 fertile and free stamens of Schwannia hexandra H gynoecium of Banisteriopsis multifoliolata showing ovary in lilac, styles in blue and stigmas in yellow I uncinate apex of styles of Amorimia septentrionalis J truncate style apex of Amorimia rigida K subulate apex of style of Byrsonima sericea L 3 parallel and erect styles of Bronwenia megaptera M single curved style of Schwannia hexandra N 3 divergent styles of Stigmaphyllon blanchetii with foliate apices O 3 erect, slightly curved, and pubescent styles of Diplopterys lutea P 3 divergent styles of Stigmaphyllon lalandianum with reduced foliate apices Q 3 divergent styles of Stigmaphyllon glabrum without foliate apex (all line drawings by K. Souza; SEMs by R. F. Almeida; all scales: 1 mm, except for the pollen grain: 10 µm).