Mucuna monticola N. Zamora, T.M. Moura & A.M.G. Azevedo, Phytotaxa

De, Tânia M., Lewis, Gwilym P., Mansano, Vidal F. & Tozzi, Ana M. G. A., 2018, A revision of the neotropical Mucuna species (Leguminosae-Papilionoideae), Phytotaxa 337 (1), pp. 448-450 : 448-450

17. Mucuna monticola N. Zamora, T.M. Moura & A.M.G. Azevedo, Phytotaxa 60: 2. 2012.

TYPE:— PANAMA. Província de Chiriqui , 9 July 1940 (fl./fr.) R.E. Woodson Jr. & R. W. Schert 324 (holotype: GH!; isotypes: MO!; US!) .

Lianas. Leaves 3-foliolate; pulvinus 5.0–10 × 3.0 mm; petiole 6.5–10.5 cm long; stipels absent; rachis 1.5–2.5 cm long; petiolules 5.0– 10 mm long; blades ovate to elliptic, occasionally obovate, that of the apical leaflet 9.0–17 × 4.5–8.0 cm, those of the lateral leaflets 9.0–12 × 4.0–6.0 cm, asymmetrical, all blades acute or rounded at base,

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acuminate or cuspidate at apex, thinly strigulose adaxially, more sparse strigulose to glabrescent or glabrous abaxially; venation eucamptodromous, secondary veins 4–6-pairs per leaflet. Inflorescence axillary, pseudoracemose; peduncle 30 cm –1.0 m long; rachis 3.0–5.0 cm long, internodes 2.0–9.0 mm long; bracts caducous; pedicels 4.0–7.0 cm long. Flowers 3.5–4.5 cm long; calyx sericeous on both surfaces, 2.0– 2.7 cm long; lobes 4, the adaxial lobe 11–13 × 4.0 mm, formed by two entirely connate sepals, apex acute, the lateral and abaxial lobes 5.0 × 3.0 mm, apex obtuse; corolla reportedly green (A.F. Skutch 3723 GH, K, US); greenish white (R.E. Woodsons Jr. & R.W. Schery 324 GH, US) or greenish yellow (R.E. Woodsons Jr. et al. 696 GH, NY, US); standard broadly elliptic, 2.5–3 cm long, basally attenuate, apically rounded, the claw ca. 2 mm long; wings oblong-obovate, 2–2.5 × 0.5–0.7 cm, basally attenuate, apically obtuse, pubescent at base, the claw ca. 1 cm; keel petals oblong, 3.5–4.5 × 1.5–2 cm, attenuate at base, obtuse at apex, pubescent at base, the claw ca. 1 cm. Stamen filaments 3.5–4.5 cm long, glabrous. Gynoecium 3.5–4.5 cm long; ovary 8.0–10 × 2.0 mm, densely sericeous; style 3.0–4.0 cm long, densely sericeous, glabrescent at apex, stigma peltate, villous. Fruits stipitate, conspicuously hispid pubescent, with long reddish brown stout stinging hairs; stipe ca. 2.5 cm long; body 15–24 × 4.0–4.5(–6.0) cm, oblong in outline, laterally compressed, attenuate at base, acuminate at apex, the surface prominently reticulate-ridged, with both transverse and longitudinal conspicuous, irregular, 5.0– 10 mm high lamellae, not constricted between the 2–5 seeds. Seeds ca. 3.7 × 3.0 cm, rounded or subquadrangular, black; hilum nearly circling entire seed circumference.

Taxonomic notes:— Mucuna monticola Moura et al. (2012a: 2–7) belongs to a group of Mucuna species endemic to the Neotropics, which all have their wing petals shorter than the standard petal (i.e., M. argyrophylla , M. chiapaneca , M. globulifera , M. jarocha , M. holtonii , M. mollis , M. monticola , and M. tapantiana ). Mucuna monticola mainly differs from the other species in this group by its prominently reticulate-ridged fruit surface, consisting of transverse and longitudinal ridges (vs. fruits lacking lamellae in the other species, except for M. tapantiana which has indistinct low diagonal lamellae all orientated in the same direction). Moreover, the abaxial surface of the leaflets has a dense indumentum in M. argyrophylla , M. holtonii , M. jarocha and M. mollis (vs. a sparse glabrescent indumentum in M. chiapaneca , M. globulifera , and M. monticola ). Stipels are persistent in M. chiapaneca , M. argyrophylla , M. holtonii , M. jarocha , and M. mollis (vs. absent in M. globulifera , M. monticola and M. tapantiana ).

Phenology:— Flowering and fruiting throughout the year.

Distribution and habitat:— Mucuna monticola occurs in montane regions (N. Zamora, personal communication) of Costa Rica and Panama ( Fig. 10 ), between 1200 and 2000 m.

Conservation status:— Mucuna monticola is as assessed as being of Least Concern (LC). Although M. monticola has a restricted area of occupancy (32 km 2, EN), the habitat in which the species occurs is not considered to be significantly fragmented. No decline, or fluctuation, in known populations has been recorded.

Representative specimens examined:— COSTA RICA. Vicinity of Vara Blanca, N slope of Central Cordillera , between Pods and Barba Volcanoes, March 1938 (fl.), A.F. Skutch 3723 ( GH, K, US) . Guanacaste: Cordillera de Tilarán, 1 km al N de Las Nubes de Río Chiquito , Zona Monteverde , Atlantic slope rain forest, 10°22'N, 84°51'W, 1300 m, 4 September 1988 (fr.), W. A. Haber & W. Zuchowski 8670 ( MO, INB) . Puntarenas: Monteverde, Cordillera de Talamanca , area around Río Canasta , 9.5 airline km NW of Agua Caliente, between Cerro Frantzius and Cerro Pittier , 1500–1600 m, 09°02'N, 82°59'W, 6 September 1984 (fr.), G. Davidse et al. 28421 ( CR, MO) ; Monteverde Cloud Forest Reserve, Pacific slope, lower montane wet forest, 10°20'N, 84°50'W, 1400 m, 22 April 1986 (fl.), W. A. Haber et al. 4665 ( MO) ; Monteverde , lower montane forest, 1400 m, 14 July 1990 (str), A. H. Gentry et al. 71669 ( MO) . PANAMA. Chiriquí: Finca Lérida to Peña Blanca , 7 July 1940 (fl./fr.), R.E. Woodsons Jr. & R. W. Schery 324 ( GH, US) ; Vicinity of Casita Alta, Volcán de Chiriquí , ca. 1500–2000 m, 28 June –2 July, 1938 (fl./fr.), R.E. Woodson Jr. et al. 969 ( GH, MO, NY, US) ; Vicinity of Bajo Mona and Quebrada Chiquero , 1500 m, 18 July 1940 (fl.), R.E. Woodson Jr. & R. W. Schery 517 ( MO) ; Vicinity of Bajo Mona and Quebrada Chiquero , 1500 m, 18 July 1940 (fr.), R.E. Woodson & R. W. Schery 517 ( MO) ; Finca Lérida to Peña Blanca , 1750–2000 m, 9 July 1940 (fl./fr.), R.E. Woodson & R. W. Schery 324 ( MO) ; Boquete near Fred Collin’s finca, 3 August 1960 (fl.), J.E. Ebinger 740 ( MO, US) ; Finca Collins, vicinity of Boquete , 24 July 1966 (fr.), K.E. Blum & J. D. Dwyer 2531A ( MO) ; 3.5 miles NE of Boquete, end of road along Río Palo Alto. 19 November 1978 (fr./fl.), B.E. Hammel 5729 ( MO) ; Forests and edges of cafetals of Finca Ojo de Agua , 1300 m, 08°51'N, 82°46'W. 14 October 1981 (fr.), S. Knapp 1595 ( MO) ; Río Palo Alto, high SE fork 1 km W to Cerro Azul , 13 May 1983 (fl.), R. J. Schmalzel et al. 1585 ( MO) ; Palo Alto , SE fork, 1800 m, 21 September 1983 (fl.), R.J. Schmalzel 1767 ( MO) ;

A REVISION OF THE NEOTROPICAL MUCUNA SPECIES

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Trail to Cerro Pata de Macho, Palo Alto , 05 June 1983 (fl.), R. J. Schmalzel 1646 ( MO). Coclé. Valle de Antón and Vicinity , 500–700 m, 23–27 July 1935 (fl.), R. J. Seibert 434 ( MO) .

Figures

FIGURE 10. Geographical distribution of five neotropical species of Mucuna: M. monticola and M. tapantiana (endemic to Central America) M. ecuatoriana and M. killipiana (endemic to South America) M. globulifera (Central and South America).