Mucuna cuatrecasasii Hern. Cam. & C. Barbosa ex L.K. Ruiz, Estud. Legum. Colomb.

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

6. Mucuna cuatrecasasii Hern. Cam. & C. Barbosa ex L.K. Ruiz, Estud. Legum. Colomb. 2: 393 (-396; fig. 1). 2009. ( Fig. 8 )

TYPE:— COLOMBIA. Granjas del Padre Luna , El Gran Cuidadano, 12 November 2005 (fl.), L.K. Ruiz et al. 301 (holotype: ANDES!; isotype: COL!) .

Liana. Leaves 3-foliolate; pulvinus 10–20 × 3.0–5.0 mm; petiole 9.0– 12 cm long; stipels absent; rachis ca. 1.0 cm long; petiolules ca. 1.0 cm long; lateral leaflets, 9.0–13 × 6.0– 8.5 cm, asymmetric at base, cuspidate at apex; apical leaflets ovate, 8.0–13 × 6.0– 8.5 cm, rounded at base, cuspidate at apex; venation eucamptodromous, secondary veins in 6 pairs per leaflet; dense, adpressed silvery hairs on abaxial surface; sparse adaxially. Inflorescence axillary, umbel-like pseudoraceme; peduncle 30–120 cm long; bracts 4.0–12.5 × 3.0– 11 cm long, persistent; pedicels ca. 2.0 cm long. Flowers 7.0– 11 cm long; calyx 1.5–2.2 cm long, 4-lobed, the adaxial lobe formed by two connate sepals, 12 × 6.0 mm, acute at apex, the other three lobes 6.0 × 2.0 mm, acute at apex; corolla reported to be white-green (D. Stancik 1146 COL), greenish-white (S. Obando 123 COL), yellowish-cream (H. García-Barriga

A REVISION OF THE NEOTROPICAL MUCUNA SPECIES

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MOURA ET AL.

18046 COL, US) or white (E. Forero & J. Garzón 349 COL); standard broadly elliptic, 4.0–5.0 × 3.0 cm, cordate at base, rounded to retuse at apex, claw 4.0 mm long; wings oblong-elliptic, 7.0–11 × 2.0 cm, attenuate at base, round to acute at apex, the claw 8.0 mm long; keel petals oblong-elliptic, 7.0–11 × 2.0 cm, attenuate at base, acute at apex, the claw 8.0 mm long; pubescent at base of wing and keel petals. Stamen filaments 8.0– 10.4 cm long, glabrous. Style 8.0– 11 cm long, sericeous, except at apex; ovary 10–14 mm long, sericeous; stigma peltate, villous. Fruits 27–30 × 4.5 cm, slightly ornamented by transverse lamellae, covered with dense hairs, acute to acuminate at base, acute at apex, lignified wings along fruit margin, up to 7-seeded. Seeds globose, 2.5–3.0 × 2.5–3.0; hilum circling 75–85% of the seed circumference, 5 mm high.

Taxonomic notes:— Mucuna cuatrecasasii is morphologically similar to M. klitgaardiae , but it differs by the presence of adpressed hairs on the abaxial surface of leaflets, the peduncle 30–120 cm long, and the fruits slightly ornamented by lamellae in M. cuatrecasasii (vs. erect hairs on the abaxial surface of the leaflets, the peduncle 20–40 cm long, and the fruits not ornamented by lamellae in M. klitgaardiae ). Mucuna cuatrecasasii is endemic to Colombia, whilst M. klitgaardiae is restricted to Ecuador and Peru. Mucuna cuatrecasasii also resembles to M. cajamarca (see comments under that species).

Phenology:— Flowering throughout the year; fruiting March to November.

Distribution and habitat:— Mucuna cuatrecasasii is endemic to Colombia, in the Boyacá, Cundinamarca and Santander Districts ( Fig. 3 ). It grows in wet forest (D. Stancik 1146 COL) alt, 200–2500 m.

Conservation status:— Following the IUCN (2016) criteria, M. cuatrecasasii is assessed as being of Least Concern (LC). Although our data indicate that M. cuatrecasasii has a restricted extent of occurrence (3128.87 km 2, EN) and area of occupancy (52 km 2, EN), there is no evidence that the species habitat is severely fragmented. Furthremore, the species has been collected from more than ten different localities.

Vernacular name: — ‘ Ojo de buey’ (L.K. Ruiz, personal communication).

Representative specimens examined:— COLOMBIA. Boyacá: Gachantiva, Vereda Caja, Bosque Andino úmido, 2 November 1998 (fl.), D. Stancik 1146 ( COL) . Cundinamarca: 36 km de La vega, entre la veja y san francisco, 9 December 1965 (fl.), E. Forero & J. Garzón 349 ( COL) ; Albán, Granja del Padre Luna , el Grand Cuidadano, 11 November 2006 (fl.), M. Bernal 105 ( ANDES) ; Albán, Vereda Java, Granja del Padre Luna , 18 May 2002 (fl.), J. Betancur et al. 9621 ( COL) ; Albán, Vereda Las Marías, bosque de la granja El gran Cuidadano , Fundación Granjas del Padre Luna , 18 August 2002 (fl.), Z. Cordero-P & F. Goméz 03 ( COL) ; Albán, Vereda Las Marías, bosque de la granja El gran Cuidadano , Fundación Granjas del Padre Luna , 31 March 2003 (fr.), Z. Cordero-P et al. 76 ( COL) ; Albán, Granja Infaufiles del Padre Luna , El Gran Cuidadan, 27 October 2011 (fl.), S. Obando 123 ( COL) ; Albán, Granja del Padre Luna , el Grand Cuidadano, 12 November 2005 (fl./fr.), L.K. Ruiz et al. 301 ( ANDES) ; Cercanias de San Bernardo, hacia Sasima , matorrales y cafetales, 23 June 1940 (fl.), J. Cuatrecasas 9640 ( COL, F, US) ; Pacho, Vereda La Esmeralda , 10 May 1964 (fr.), H. García-Barriga 18046 ( COL, US) ; San Francisco, Vereda Sabaneta, Quebrada Sabaneta , 11 July 1980 (fl.), R. Restrepo s./n. ( COL) ; Sasaima, Vereda de San Bernardo, Rio Dulce , carretera Las Mercedes , 6 January 1970 (fl.), H. García-Barriga 20021 ( COL, US) ; Vergara, Pacho-depo , (fl.), F.C. Lehmann 7568 (F, K) . Santander : 17 km S de Puente Nacional, 3 March 1992 (fl.), F. González et al. 2513 ( COL, K) ; entre Virolín y Taradro, 17 km arriba de Virolín , 30 May 1958 (fl.), R.R. Castañeda & R. Jaramillo-Mejía 6797 ( COL) .

Figures

FIGURE 3. Geographical distribution of the six species of Mucuna with umbel-like pseudoracemose inflorescences endemic to South American.

FIGURE 8. Mucuna cuatrecasasii. A—Leaf. B—Detail of indumentum on abaxial surface of leaflet. C—Inflorescence. D—Bract. E—Standard. F—Wing. G—Keel petals. H—Calyx opened out, outer surface. J—Androecium opened out: 9 stamens forming a staminal sheath. K—Free vexillary stamen (anther fallen off). L—Gynoecium. Drawn from: Cuatrecasas 9640 (F). Drawn by Ana Lúcia Souza.