Burmeistera xerampelina E.Wimm., Repert., 2023

González, Favio, 2023, Taxonomic revision of Burmeistera (Campanulaceae-Lobelioideae) in Colombia, Phytotaxa 615 (1), pp. 1-113 : 100-101

57. Burmeistera xerampelina E.Wimm., Repert. Spec. Nov. Regni Veg. 29: 59. 1931.

Type:— COLOMBIA. Valle del Cauca: Cordillera Occidental, La Cumbre, 2100‒2400 m, 11 Sep 1922 (fl, fr), E. Killip 11394 (holotype: WU, not seen; isotypes: GH! [ GH00521044 ], NY! [ NY00468010 ], PH! [PH00010892], US! [US00146960]). Figs. 28 , 29I–L .

Burmeistera xerampelina var. nuda E.Wimm., Repert. Spec. Nov. Regni Veg. 29: 59. 1931, syn. nov. Burmeistera nuda (E.Wimm.) E.Wimm., Pflanzenr. IV. 276b: 142. 1943. Type :— COLOMBIA. Valle del Cauca: “Alto San Antonio prope Cali”, 2 Apr 1876 (fl), E. André 2636 (lectotype K! [ K000250862 ], designated here; isolectotype: K! [ K000250863 ]) .

Burmeistera xerampelina f. lilacina E.Wimm., Pflanzenr. IV. 276b: 147. 1943. Type :— COLOMBIA. Valle del Cauca:“Central-Kordilleren, Urwald am Río Bolo, 1100 m, Jun” (fl), E. Dryander 327 (holotype: B, probably destroyed).

Upright herbs or subshrubs, sometimes scandent or epiphytic, up to 1.5 m tall. Stem glabrous to sparsely puberulous. Petiole 3–12 mm long, glabrescent to sparsely puberulous; blade ovate, oblong or elliptic, 4–10 × 2.0– 4.4 cm, glabrous above, glabrous to scarcely puberulous beneath, base rounded to slightly cuneate, slightly asymmetric, apex acute to acuminate, margin subentire to sinuous, interrupted by 1 or 2 marginal to intramarginal hydathodes per cm, secondary veins 6 to 11 per side, slightly conspicuous beneath, intramarginal vein lacking. Peduncle 6–16 cm long, glabrous or very sparsely puberulous, ebracteolate. Hypanthium obconic, 7–12 × 4–6 mm, glabrous. Calyx lobes broadly ovate, 1.0–1.5 × 1.0– 1.5 mm, ascending, glabrous, basally spaced by sinuses up to 1 mm wide, apex acute to obtuse, margin entire, slightly sinuous, apex obtuse. Corolla green suffused with purple, glabrous except for the sparsely puberulous floral buds; tube 6–7 mm long, 2.0– 3.5 mm diameter at its mid- and distal portions, slightly inflated proximally; lobes narrowly ovate, straight or nearly so, apex acuminate; dorsal lobes 10–15 × 3–5 mm, lateral lobes 7–14 × 3–4 mm, ventral lobe 8–14 × 3 mm. Synandrium 1.9–2.4 cm long, exserted up to 8 mm; filament tube 15–18 mm long, glabrous; anther tube 4–6 mm long, glabrous, ventral anthers barbate at preanthesis, with an apical tuft of white trichomes, these are deciduous during anthesis. Berries obovoid to oblong-cylindric, 10–28 × 10–14 mm, not inflated, glabrous, white or pink.

Phenology: — Burmeistera xerampelina has been collected from January to October.

Distribution, ecology and conservation status: — Burmeistera xerampelina is restricted to cloud forests of the Western Cordillera in the department of Valle del Cauca ( Colombia), at elevations between 1100 and 2400 m. Following the IUCN´s (2022) criteria [B1(EOO) and B2(AOO), conditions (a) and (b), and C2(a)(i)], B. xerampelina qualifies as Critically Endangered, mainly due to the extremely low number of flowers per individual, the narrow distribution range, and the increased habitat destruction of its habitat.

Notes: — Burmeistera xerampelina is similar to B. salicifolia (see distinctive traits under the latter).

Burmeistera nuda was described based on the specimen E. André 2636. There are two duplicates of this specimen, both deposited at Kew. The sheet [K000250862] is here designated as the lectotype, because the floral traits are more evident in this specimen. Neither the type specimen nor the original description of B. nuda shows distinctive traits to those found in B. xerampelina . Thus, it is reduced to the synonymy of the latter.

Additional specimens examined:— Valle del Cauca. Finca Zingara, on road from km 18 on Cali-Buenaventura highway to Dapa, 4 km N of main highway, 03°32´35´´N, 76°36´W, 1900‒2100 m, 5 Aug 1997 (fl), T. Croat et al. 80639 ( CUVC) ; Cordillera Occidental , vertiente oriental, hoya del río Cali, vertiente izquierda del río Pichindé, Tareas, 2250‒2260 m, 22 Jul 1946 (fl), J. Cuatrecasas 21603 ( VALLE) ; La Cumbre, corregimiento Bitaco , vereda La Sofía, cerro Yumbillo, 2120 m, 20 Aug 2017 (fl, fr), F. González 4693 ( COL) ; San Antonio , west of Cali, near summit of Cordillera Occidental, 1900‒2350 m, 26 Feb–2 Mar 1939 (fl), E. Killip et al. 33891 ( COL, GH, NY) ; La Cumbre, cerro de Yumbillo, corregimiento Bitaco , vereda La Sofía, 2200 m, 5 Oct 1988 (fl), M. Klimkiewicz 136 ( CUVC) ; La Elvira, finca Zingara , 1800‒2200 m, ca 25 km W of Cali at km 18, ca. 3º28´N, 76º37´W, 19 Apr 1989 (fl, fr), J. L. Luteyn et al. 12517 ( CUVC, NY), 12531 ( CUVC, NY) ; Queremal , campamento Tokio (Telecom towers), ca. 9 km W of Queremal, ca. 3º30´N, 76º42´W, 2000‒2100 m, 21 Apr 1989 (fl), J. L. Luteyn et al. 12596 ( CUVC, NY) ; La Cumbre, vereda Chicoral Alto , above Dapa, ca. 3°39´N, 76º35´W, 1940‒2000 m, 22 Apr 1989 (fl, fr), J. L. Luteyn et al. 12607 ( CUVC, NY) ; La Cumbre, 2000‒2200 m, 14–19 May 1922 (fl, fr), F. Pennell et al. 5798 ( GH, NY, PH) ; Cali , km 18 via a Buenaventura, por la antigua carretera, entre el km 18 y el 14, 28 May 1988 (fl), J. Ramos 997 ( NY) ; San Antonio , cerro La Horqueta, cordillera Occidental, vertiente oriental, ca km 17 de carretera Cali-Buenaventura, 2060‒2100 m, 20 Jan 1986 (fl), P. Silverstone et al. 2117 ( CUVC, NY) ; Cerro Horqueta , San Antonio above Cali, ca. 3º25´N, 76º35´W, 2050‒2200 m, 20 Jan 1986 (fl, fr), B. Stein et al. 3231 ( CUVC, NY).

Figures

FIGURE 28. Distribution of Burmeistera variabilis, B. venezuelensis, B. villosa, B. vulgaris and B. xerampelina.

FIGURE 29. A–D. Burmeistera villosa (Luteyn et al. 12310, type), flowering branch (A), leaf (B), leaf margin (C), and flower at preanthesis (D). E–H. B. vulgaris (E–G, Silverstone et al. 2995; H. Luteyn et al. 11898), leaf (E), leaf margin (F), flower (G), and berry (H). I–L. B. xerampelina (Killip 11394, type), leaf (I), leaf margin (J), flower (K), and berry (L). Scale bars: 5 mm in A, B; 2 mm in C, D; 1 cm in E, I; 2 mm in F, J–L; 5 mm in G, H; 1 cm in I.