Jacquemontia frankeana (Schltdl.) M. Pastore & Sim.

Pastore, Mayara & Simão-Bianchini, Rosangela, 2015, Taxonomic novelties in Jacquemontia Choisy (Convolvulaceae) from Southeastern Brazil, Phytotaxa 221 (2), pp. 193-197 : 194-195

Jacquemontia frankeana (Schltdl.) M. Pastore & Sim. -Bianch., comb. nov.

Basionym: Convolvulus frankeanus Schlechtendal (1834: 513) . Type:— BRAZIL. Rio de Janeiro: Rio de Janeiro, M.R. Frank s.n. (holotype HAL 98085 photo!).

Jacquemontia uleana Hallier (1899: 31) . Type:— BRAZIL. Rio de Janeiro: Rio de Janeiro, in der Restinga do Harpoador , December 1896, E.H.G. Ule 4388 (lectotype here designed R!; holotype B [destroyed], photo! F; isolectotype LIL!).

Additional specimens examined:— BRAZIL. Paraná: Antonina , 25 October 2002, M. Borgo 1944 ( MBM!) ; Guaratuba , 7 December 1971, L. Krieger 10975 ( MBM!, CESJ!) ; Morretes , 13 December 1974, G. Hatschbach 35623 ( MBM!, RB!) ; Paranaguá , 16 November 1985, R. M. Britez 24725 ( UEC!) ; 25°33’324” S 48°34’355” W, 20 December 2011, P. P. A. Ferreira 805 ( SP!, ICN!). Santa Catarina: São Francisco do Sul, 28 October 2008, T. G. Fendrich 105 ( MBM!). São Paulo: Cananéia , 5 April 1988, M. G. L. Wanderley 1013 ( SP!, SPF!) ; 25°03’05”S 48°05’42”W, 29 October 1991, F. de Barros 2320 ( SP!, SPF!) ; 11 March 2013, M. Pastore 276 ( SP!) ; Eldorado , 28 March 2005, J. C. Braidotti 117 ( SP!, ESA!, SPSF!, HRCB!) ; 13 December 2013, E. P. Fortes 2 ( SP!) ; Iguape , 30 May 1986, E. L. M. Catharino 766 ( SP!, ESA!) ; Ilhabela , 23°46’41”S 45°21’29”W, 12 February 2013, M. Pastore 232 ( SP!) ; Iporanga , 27 December 2002, R. Simão-Bianchini 1530 ( SP!) ; Juquiá, 24°14’058”S 47°36’455”W, 9 September 1994, C. A. Monteiro 23 ( SP!, SPF!, PMSP!, ESA!, HRCB!, UEC!) ; Pariquera-Açu, 24°40’33”S 47°52’37”W, 20 December 1995, N. M. Ivanauskas 664 ( SP!, ESA!, SPF!) ; Pedro de Toledo , 10 March 2013, M. Pastore 275 ( SP!) ; São Sebastião , 27 December 1971, J. Mattos 15729 ( SP!) ; Ubatuba 14 February 1997, R. Simão-Bianchini 1039 ( SP!, PMSP!) ; 23°19’29”S 45°02’11’ W, 4 January 2013, M. Pastore 221 ( SP!) .

The transfer of this species to Jacquemontia is proposed, because it has elliptic stigma lobes (“stigmate bilobo, lobis ellipticis obtusis divergentibus”) and short, stellate hairs.

Specimens of Jacquemontia frankeana have frequently been identified as J. holosericea ( Weinmann, 1828: 17; O’Donell, 1953: 357) [= J. menispermoides Choisy (1838: 63) ]. The two are morphologically similar ( Table 1), sharing corymbiform inflorescences; sepals that are glabrous and ciliate, sometimes ciliate only at the apex of the inner sepals; outer sepals that are longer than the inner ones and trichomes that are 4–5-radiate. Both species are also frequent in coastal areas in Southeastern Brazil. However, they may be distinguished because J. frankeana has glabrescent leaves with acuminate apices and adpressed hairs on both surfaces whereas J. holosericea has tomentose leaves with obtuse apices, erect to adpressed hairs on the adaxial surface, and only erect hairs on the abaxial surface.

Two other species are morphologically similar to J. frankeana ( Table 1): J. ciliata Sandwith (1930: 156) , which is distinguished by its stellate-hairy branches and leaves, the 3-rayed trichomes, equal to subequal sepals and the obovate to oblong inner sepals (ovate inner sepals in J. frankeana ); and J. glaucescens Choisy (1838: 64) , which is distinguished by the 6–8-rayed stellate trichomes which are mixed with multiradiate trichomes, and by the glabrescent to glabrous sepals with non-ciliate margins.

Jacquemontia frankeana is known only from Brazil, occurring in Rio de Janeiro, São Paulo, Paraná and Santa Catarina, in Restinga (coastal sand dunes) and Montane Ombrophilous Dense Forest of the coastal zone, growing along forest edges.

Hallier (1899), published the name J. uleana based on a specimen collected by E. H. G. Ule in Rio de Janeiro. He distinguished it from J. menispermoides (= J. holosericea ) by its adpressed hairy, glabrescent leaves, not realizing that Schlechtendal (1834) had previously described C. frankeanus . When O’Donell (1953) considered J. menispermoides as a synonym of J. holosericea , he similarly distinguished J. uleana by the adpressed indumentum, but did not mention C. frankeanus , rendering the present combination necessary.

The name Jacquemontia uleana is lectotypified here and the isotype deposited in R is selected as lectotype since the holotype in B was destroyed. This material was chosen because the duplicate in R is complete and in good condition. Furthermore, the name is based on a collection made in Rio de Janeiro ( Brazil) where the herbarium R is located.