Myrcia tenondeporan M.F.Santos & E.Barretto (2023: 70)

Santos, Matheus F., 2025, Taxonomic monograph of Myrcia sect. Eugeniopsis (Myrciinae, Myrteae, Myrtaceae), an endemic clade of Eastern South America, Phytotaxa 703 (1), pp. 1-100 : 64-67

13. Myrcia tenondeporan M.F.Santos & E.Barretto (2023: 70) . Type: — BRAZIL. São Paulo: Mun. São Paulo, Marsilac, Sítio Maravilha , Mata secundária, Rio Capivari , 23 K 324844 7350922, 12 November 2014 (fl.), Barretto 338 (holotype PMSP!; isotypes HUFABC!, RB!) ( Figures 20 , 32E–H , 36 and 37 ).

Description:— Shrub to tree, 1 to 9 m high. Trichome reddish, simple or dibrachiate, 0.08–0.32 mm. Twig when young flattened, pubescent to puberulent, when mature greyish (when dry), cylindrical, cortex slightly cracked; branching monopodial (often sympodial), internode 1.0–8.0 cm, node slender; cataphylls absent or present at the base of the SGU, foliaceous, deciduous; buds pubescent. Leaf concolorous, chartaceous, blade 4.8–15.8 × 1.5–6.0 cm, narrowly to widely elliptic, oblong, ovate to widely ovate, obovate to widely obovate, apex acuminate or caudate, base narrowly cuneate to rounded or attenuate, margin plane, secondary veins 1–8 mm apart, held at an angle of 50–75° relative to the midvein, marginal vein 0.5–2.0 mm from the margin, tertiary veins usually inconspicuous in the adaxial surface, conspicuous to inconspicuous in the abaxial surface, areoles 0.3–2.0 mm, pellucid dots usually conspicuous in the abaxial surface, 1–5 per mm 2; adaxial surface glabrous, secondary veins plane to raised; abaxial surface puberulent to subglabrate, secondary veins plane to raised; petiole 9–21 × 1–2 mm, canaliculate, pubescent to puberulent. Inflorescence 2.5–8.5 × 1.5–5.5 cm, 9–40 flowers, axillar at the subterminal nodes of the SGU (central bud developing a vegetative branch), usually only one pair per SGU, one inflorescence per axillary bud, inflorescence pherophyll deciduous, opposite branching, three branching per node, rachis pubescent to puberulent, first internode of central rachis 1–2 mm wide; bracts 1.0–4.0 × 0.4–1.0 mm, deciduous, lanceolate to ovate, concave, apex acuminate to acute or caudate, base truncate, externally puberulent, internally puberulent to glabrous; bracteoles 0.8–3.0 × 0.2–2.0 mm, deciduous, narrowly elliptic or lanceolate to ovate, concave or keeled, apex acuminate or caudate, base truncate, both surfaces puberulent. Flower bud 1.6–1.8(3.0) × 1.2–2.5 mm, clavate, corolla hidden or barely apparent before anthesis; hypanthium 1–1.5 mm extending above the summit of the ovary, not tearing at anthesis or often with a small vertical rip (but usually not tearing the staminal ring), externally pubescent to puberulent, pellucid dots covering the whole surface (sometimes covered by the indument); calyx 4–merous, lobes 0.4–1.5 × 1.0–1.2(2.0) mm, not fused, deciduous parallel to the hypanthium ring, depressed ovate to widely depressed ovate, concave, apex rounded, externally pubescent to puberulent, internally puberulent; corolla 4–merous, petals white, 1.1–1.2(2.0) × 1.2–1.6(2.0) mm, obovate to very widely obovate, plane to concave, apex rounded, both surfaces puberulent to glabrous; staminal ring 0.2–0.5 mm wide, puberulent, stamens 30–107, filament 2.8–7.0 mm long, anther 0.16–0.24 × 0.24–0.40 mm, gland at the apex; ovary 0.6–1.0 × 0.6–1.0 mm, obconic, style 4.4–8.0 mm long, glabrous, stigma punctiform (often slightly swollen). Fruit immature green, mature black, 1.2–1.8 × 1.4–1.8 cm, globose, base rounded, puberulent to glabrous, totally covered by pellucid dots, remnants of hypanthium and calyx present; seeds 1 or 2 per fruit.

Distribution and Habitat: — Myrcia tenondeporan is distributed within the Atlantic Forest domain along the Serra do mar escarpments, ranging from northern Santa Catarina to southern Rio de Janeiro states ( Figure 20 ). It grows in rainforest, riparian forest and restinga, at elevations from 0 to 900 meters. This species generally inhabits the undercanopy but has also been recorded at forest edges and riparian zones ( Santos & Barretto 2023).

Phenology: —Flowering occurs from September to February, with a peak from November to December. Fruiting has been recorded throughout the year, though mature fruits were found only from August to December.

Conservation Status: —According to Santos & Barretto (2023), based on the Extent of Occurrence (33,533 km 2) and the Area of Occupancy (276 km 2), the species is preliminarily considered as Vulnerable (VU, criteria B2a, bii, biii; IUCN 2022).

Taxonomy: — Myrcia tenondeporan is distinctively characterized by its monopodial (often sympodial) branching, leaves with elongated (acuminate or caudate) apices, inflorescence typically paired at the subterminal node of the SGU with deciduous pherophyll, and small flower bud with a constrict apex ( Figure 32E–H ). Specimens of M. tenondeporan were previously often identified as M. vellozoi , but M. tenondeporan can be distinguished by its smaller tree size, more elongated leaf apices, and smaller floral bud ( Santos & Barretto 2023). Myrcia tenondeporan also shares similarities with Myrcia eugeniopsoides in leaf blade shape and size as well as much of its range, but M. eugeniopsoides has a closed floral bud with indistinct calyx lobes, which open irregularly during anthesis ( Santos & Barretto 2023). Myrcia tenondeporan is also similar to Myrcia clausseniana but differs by the distribution, the inflorescence with usually only one pair per seasonal growth unit, and the bigger mature fruit. Vernacular names include “guamirim-branco” in São Paulo state and “guamirim” or “guamirim-mamão” in Paraná state.

Illustrations and images in previous works: — Santos & Barretto (2023).

Additional specimens examined: — BRAZIL. Unknown province /state, no date (fl.), W. J . Burchell 3662 ( K, P). Paraná: Mun. Guaraqueçaba , 20 November 1974 (fl.), G . Hatschbach 35507 ( MBM, UEC); ibidem, May 2003 (fr.), L . D.Meireles 1420 ( UEC). Mun. Guaratuba , 12 December 1993 (fl.), J. M . Silva 1287 ( HUEFS, MBM); ibidem, 8 November 2003 (fl.), E. J . Lucas 190 ( K, MBM). Mun. Matinhos , 17 May 2003 (fr.), J . Sonehara 3 ( BHCB). Mun. Paranaguá , 21 November 1967 (fl.), G . Hatschbach 17896 ( MBM, NY, P, US); ibidem, 24 November 1962 (fl.), G . Hatschbach 10169 ( K, MBM, SPSF); ibidem, 25 November 1967 (fl.), G . Hatschbach 17969 ( MBM); ibidem, 29 May 1966 (fr.), G . Hatschbach 14393 ( MBM); ibidem, 6 June 1995 (fr.), S. R . Ziller 756 ( SPSF); ibidem, 6 June 1995 (fr.), S. R . Ziller 773 ( ESA); ibidem, 8 November 1986 (fl.), R. M . Britez 24578 ( UEC); ibidem, 17 April 1987 (fr.), S. M . Silva 24577 ( UEC); ibidem, 5 December 1992 (fl.), S. M . Silva s.n. ( UEC75574 ). Mun. Pontal do Paraná , 26 November 2012 (fl.), R. A . Bonaldi 611 ( MBM). Rio de Janeiro: Mun. Paraty , 16 May 1995 (fr.), R . Marquete 2144 ( RB); ibidem, 23 November 1990 (fl.), C . Farney 2517 ( RB); ibidem, 8 September 2013 (fr.), A. G . Silva 3 ( SPSF); ibidem, 12 April 1994 (fr.), R . Marquete 1578 ( RB, UEC). Santa Catarina: unknown municipality, 8 May 2004 (fr.), K . Bourscheio 66 ( BHCB); 25 May 2004 (fr.), Equipe Acaraú 96 ( BHCB). Mun. Garuva , 4 November 2004 (fl.), A. C . Cervi 8725 ( MBM). Mun. Itapoá , 6 November 1992 (fl.), R . Negrelle 542 ( CRI). São Paulo: unknown municipality, 16 November 1826 (fl.), W. J . Burchell 3649 ( NY, US). Mun. Bertioga, 10 February 2000 (fl.), P. S. P . Sampaio 435 ( SP); ibidem, 11 March 1999 (fr.), S. E . Martins 394 ( SP, SPSF); ibidem, 12 August 1999 (fr.), P. S. P . Sampaio 315 ( SP); ibidem, 14 December 1972 (fl.), G . Gottsberger 18-141272 ( MBM, SP); ibidem, 14 January 1999 (fl.), M. A. G . Magenta 77 ( SP); ibidem, 19 January 1999 (fl.), E. A . Anunciação 679 ( SP, SPSF); ibidem, 22 April 1999 (fr.), P. S. P . Sampaio 247 ( SP); ibidem, 22 June 1999 (fr.), S. E . Martins 501 ( SP); ibidem, 26 August 1999 (fr.), L . Rossi 2056 ( SP); ibidem, 27 November 1989 (fl.), M. T . Grombone 22449 ( UEC); ibidem, 28 November 1989 (fl.), L. T . Silveira 22514 A ( UEC); ibidem, 29 May 1990 (fr.), M . Kirizawa 2291 ( SP, UEC); ibidem, 29 November 1989 (fl.), M. T . Grombone 22862 ( UEC); ibidem, 6 May 1999 (fr.), S. E . Martins 466 ( SP). Mun. Cananéia , 9 June 2012 (fr.), V. G . Staggemeier 809 ( K); ibidem, 5 November 1979 (fl.), D. A . Grande 214 ( SP); ibidem, 6 July 1989 (fr.), F . Barros 1711 ( SP); ibidem, 28 November 1974 (fl.), J . Mattos 16174 ( SP, SPF); ibidem, 10 November 1977 (fl.), D. A . Grande 13 ( SP, SPSF); ibidem, no date (fl.), D.Sampaio 117 ( ESA, RB, SPSF); ibidem, 30 October 1985 (fl.), M . Kirizawa 1520 ( SP); ibidem, 9 June 2012 (fr.), V. G . Staggemeier 828 ( K); ibidem, 16 December 2006 (fl.), V. G . Staggemeier 98 ( MBM). Mun. Cubatão , 8 June 2010 (fr.), M. F . Santos 580 ( SPF); ibidem, 14 December 1988 (fl.), O. T . Aguiar 292 ( SPSF); ibidem, 29 November 1988 (fl.), R . Esteves 1 ( SPSF); ibidem, 21 December 1994 (fl.), S. A. C . Chiea 824 ( SP, SPF). Mun. Iguape , 11 December 1985 (fl.), E. L. M . Catharino 538 ( ESA, SP); ibidem, 30 March 1986 (fr.), E. L. M . Catharino 779 ( ESA, SP); ibidem, 8 November 1986 (fl.), C. B. J . Jaramillo 4 ( ESA, SP); ibidem, 23 June 1992 (fr.), D. F . Pereira 179 ( SP); ibidem, 13 June 1991 (fr.), E. A . Anunciação 75 ( SP); ibidem, 15 December 1991 (fl.), E. A . Anunciação 118 ( SP, SPF); ibidem, 29 August 1993 (fr.), E. A . Anunciação 357 ( MBM, SP); ibidem, 14 December 1993 (fl.), E. A . Anunciação 434 ( MBM, SP); ibidem, 11 December 1990 (fl.), I . Cordeiro 779 ( MBM, SP); ibidem, 8 December 1994 (fl.), I . Cordeiro 1489 ( SP); ibidem, 14 May 1991 (fr.), L . Rossi 869 ( SP); ibidem, 12 June 1991 (fr.), L . Rossi 904 ( SP); ibidem, 17 December 1991 (fl.), L . Rossi 1026 ( SP); ibidem, 13 March 1990 (fr.), M. C. H . Mamede 225 ( SP); ibidem, 21 June 1990 (fr.), M. C. H . Mamede 292 ( SP); ibidem, 27 June 1993 (fr.), M. C. H . Mamede 542 ( NY, SP); ibidem, 25 April 1991 (fr.), M. M. R. F . Melo 954 ( SP); ibidem, 7 January 1999 (fr.), M. R . Gorenstein 51 ( ESA, RB, SPSF, UEC); ibidem, 16 January 1983 (fl.), N . Figueiredo 14400 ( UEC); ibidem, 16 August 1990 (fr.), S. A. C . Chiea 573 ( SP); ibidem, 12 December 1990 (fl.), S. J. G . Silva 112 ( SP); ibidem, 12 December 1990 (fl.), S. J. G . Silva 120 ( SP). Mun. Itanhaém , 7 July 2001 (fr.), N. M . Ivanauskas 4490 ( ESA); ibidem, 17 April 2001 (fr.), F. M . Souza 197 ( ESA, RB); ibidem, 17 April 2001 (fr.), F. M . Souza 205 ( ESA, SPSF, UEC); ibidem, 29 March 2005 (fr.), F. M . Souza 592 ( BHCB, SPSF); ibidem, 14 March 2005 (fr.), R . Cielo-Filho 383 ( MBM, SPSF). Mun. Pariquera-Açu , 29 September 1998 (fl.), M . Sztutman 43 ( ESA); ibidem, 23 November 1998 (fl.), M . Sztutman 79 ( ESA, RB). Mun. Peruíbe , 11 October 1987 (fl.), G . Hashimoto 17152 ( SP); ibidem, 9 October 1995 (fl.), V. C . Souza 9276 ( ESA, MBM, RB, SP); ibidem, 21 June 1994 (fr.), I . Cordeiro 1505 ( SP, UEC); ibidem, 6 November 1988 (fl.), V. C . Souza 341 ( ESA). Mun. Praia Grande , 25 October 2007 (fl.), A . Lobão 1441 ( RB). Mun. Salesópolis , 17 March 1958 (fr.), M . Kuhlmann 4351 ( SP). Mun. Santo André , 13 December 2007 (fl.), R. J . Almeida-Scabbia 5219 ( P, SP); ibidem, 5 June 2008 (fr.), F . Búgola-Silva 8201 ( NY, P, SP); ibidem, 16 January 1920 (fl.), F. C . Hoehne s.n. ( SP3607 , SPF, US); ibidem, 6 December 1961 (fl.), J . Mattos 8682 ( SP, SPF, US); ibidem, 30 August 1961 (fr.), J . Mattos 9093 ( SP, SPF, US); ibidem, 6 August 1961 (fr.), J. R . Mattos s.n. ( SP64710 ); ibidem, 5 November 1991 (fr.), M . Kirizawa 2534 ( SP); ibidem, 20 November 1984 (fl.), M . Sugiyama 566 ( SP); ibidem, 30 September 1988 (fr.), M . Sugiyama 787 ( SP). Mun. Santos ,1875 (fr.), [Mosiu] 2783 ( P); ibidem, 22-23 October 1826 (fl.), W. J . Burchell 3266 ( K); ibidem, 3 May 1994 (fr.), M. M. R. F . Melo 1009 ( BHCB, SP). Mun. São Bernardo do Campo , 22 August 1990 (fr.), S . Ferreira s.n. ( SP271139 ). Mun. São Paulo, September 1994 (fr.), I . Cordeiro 1642 ( SP); ibidem, 20 October 1998 (fl.), A . Furlan s.n. ( BHCB84697 ); ibidem, 22 June 1995 (fr.), S. A. P . Godoy 612 ( MBM, SP); ibidem, 2 May 1996 (fr.), G. M. P . Ferreira 86 ( SP); ibidem, 28 January 1999 (fr.), L. C. Q. M. P . Sampaio 149 ( MBM, SPF, SPSF); ibidem, 13 October 2016 (fl.), M. F . Santos 872 ( SORO); ibidem, 28 November 1980 (fl.), S. L . Jung 369 ( MBM, SP). Mun. São Vicente , 21 November 2003 (fl.), C . Moura 43 ( SPSF); ibidem, 16 February 2001 (fr.), J. A . Pastore 958 ( SP, SPSF). Mun. Ubatuba , 12 January 1993 (fl.), M. A . Assis 71 ( UEC); ibidem, 13 November 1993 (fl.), A. L. M . Franco 29358 ( SP, SPF, UEC); ibidem, 17 November 1999 (fl.), D. C . Zappi 311 ( SP, UEC); ibidem, 21 June 1996 (fr.), S. L. R . Castro 49 ( SP, SPSF); ibidem, 6 November 1988 (fl.), A . Furlan 596 ( SPSF, UEC); ibidem, 7 November 1988 (fl.), A . Furlan 639 ( SPSF, UEC) .

Figures

FIGURE 20. Distribution of Myrcia gaudichaudiana (triangles) and Myrcia tenondeporan (circles). Solid lines represent the boundaries of South American countries and Brazilian states. The grayscale reflects elevation.

FIGURE 32. A–D. Myrcia reitzii. A. Habit of specimen approximately 25 m tall. B. Trunk with thick bark. C. Fruiting branch showing swollen node. D. Immature obovoid fruits. E–H. Myrcia tenondeporan. E. Internal bark. F. Immature leaves. G. Fruiting branch; note the prolonged leaf apex. H. Cross section of mature fruit. Image credits: A–E, G and H) Eduardo H. P. Barretto.

FIGURE 36. Representative specimens of Myrcia sect. Eugeniopsis: Myrcia tenondeporan (Franco 29358 [SPF]).

FIGURE 37. Representative specimens of Myrcia sect. Eugeniopsis: Myrcia tenondeporan (Mattos 16174 [SPF]).