Burmeistera pinnatisecta Luteyn, Syst. Bot.

González, Favio, 2023, Taxonomic revision of Burmeistera (Campanulaceae-Lobelioideae) in Colombia, Phytotaxa 615 (1), pp. 1-113 : 74-75

40. Burmeistera pinnatisecta Luteyn, Syst. Bot. 11: 474. 1986.

Type:— COLOMBIA. Cauca: Parque Natural Nacional Munchique , km 42‒47 NE de la Uribe, 2350‒2650 m, 23 Apr 1979 (fl, fr), J. L. Luteyn, M. Lebrón-Luteyn & G. Morales 7427 (holotype: COL! [ COL000004738 ]; isotypes: COL! [ COL000004739 ], NY! [ NY00468002 ]). Figs. 18I, J , 20 .

Scandent subshrubs up to 3 m tall. Stem glabrous. Petiole 3‒5 mm long glabrous; blade oblong to elliptic, (5–) 7–10 × 1–3 cm, glabrous above, puberulous along the midvein beneath, pinnatisect, with 11‒15 narrowly to very narrowly oblong lobes per side, each lobe 0.7–1.7 × 0.2 cm, base asymmetric, apex of each segment obtuse to rounded, margin entire. Peduncle 3.5–5.0 cm long, glabrous, ebracteolate. Hypanthium globose, 12–15 × 6.5–9.0 mm, glabrous. Calyx lobes oblanceolate to narrowly elliptic, 9–12 × 2–3 mm, as long as the corolla tube, patent to ascending, glabrous, basally contiguous, margin crenate with 3 to 6 teeth per side, apex acute to obtuse. Corolla green sometimes suffused with purple, glabrous; tube 9–12 mm long, 2.2–2.5 mm in diameter at its mid-level, inflated proximally and distally; lobes ovate or narrowly ovate, falcate, apex acute, dorsal lobes 16–24 × 5.8–6.0 mm, lateral lobes 10–16 × 2.8–3.0 mm, ventral lobe 5.0–8.5 × 2.8–3.0 mm. Synandrium 4.0– 4.7 cm long, exserted up to 3.5 cm; filament tube 3.5–4.0 cm long, glabrous; anther tube 5–7 mm long, glabrous, ventral anthers ebarbate. Berries globose to oblate, 1.5‒3.0 × 1.7–3.0 cm, inflated, glabrous, green when juvenile, later white suffused with purple.

Phenology: — Burmeistera pinnatisecta has been collected with flowers and fruits in March, April, and from June to August.

Distribution, ecology and conservation status: — Burmeistera pinnatisecta is restricted to cloud forests at the Munchique Natural National Park, in the department of Cauca, at elevations between 2000 and 2650 m. Following the IUCN´s (2022) criteria [B1(EOO) and B2(AOO), conditions (a) and (b), and C2(a)(i)], this species qualifies as Critically Endangered.

Notes: — Burmeistera pinnatisecta is similar to B. pteridioides , endemic from the department of Boyacá, in the Eastern Cordillera of Colombia. It differs by the peduncle 3.5–5.0 cm long; the flowers 3.2–4.5 cm long, including the hypanthium of 12–15 mm long; the calyx lobes 9–12 mm long, as long as the corolla tube, oblanceolate to narrowly elliptic, margin with 3 to 6 teeth per side; the corolla with dorsal lobes 16–24 mm long, lateral lobes 10–16 mm long, and ventral lobe 5.0– 8.5 mm long; the filament tube 3.5–4.0 cm long, glabrous; the ventral anthers ebarbate; and the berries globose to oblate, 1.7–3.0 cm in diameter (versus the peduncle 6–7 cm long; the flowers often shorter (to 3.5 cm long, including the hypanthium of 4–5 mm long); the calyx lobes 3–5 mm long, shorter than the corolla tube, oblong, margin with 1 or 2 teeth per side; the corolla with dorsal lobes 10–12 mm long, lateral lobes 7–9 mm long, and ventral lobe 4–5 mm long; the filament tube 1.8–2.2 cm long, puberulous; the ventral anthers barbate; and the berries oblate, 1.5–1.7 cm in diameter in B. pteridioides ).

Additional specimens examined:— Cauca. El Tambo, Parque Nacional Munchique , carretera entre las cabañas de La Romelia y Charguayaco, 2450‒2650, 21 Jun 2001 (fl), R. Bernal 2856 ( COL) ; El Tambo, vereda La Romelia, PNN Munchique, camino de la casa de visitantes a La Gallera , 2500 m, 22–24 Aug 2011 (fr), J. Garzón et al. 594 ( COL), 595 ( COL), 596 ( COL) ; El Tambo, PNN Munchique, vereda La Romelia, Quebrada Charco Azul, 2570 m, 20 Jul 1993 (fl, fr), F. González 2859 ( COL, PSO) ; PNN Munchique, km 42 y/o km 58 of Uribe-La Gallera road, 2000‒2500 m, 27 Mar 1986 (fl), B. Stein 3763 ( COL).

Figures

FIGURE 18. A–D. Burmeistera minutiflora (González et al. 945, type), leaves and young berry (A), leaves and flower (B), flower at side (C) and frontal (D) view. E, F. B. multiflora (Luteyn et al. 10674), corymbiform flowering portion of the branch (E), and flower (F). G, H. B. nigropilosa (Luteyn et al. 11700, type), leaves and flower. I, J. B. pinnatisecta (González et al. 2859), flowering (I) and fruit-bearing (J) branches. Photo credits: A–D, M.F. González; E–H, J.L. Luteyn; I, J, F. González. Scale bars: 1 cm in A, E, G, I, J; 5 mm in B, F, H; 2 mm in C, D.

FIGURE 20. Distribution of Burmeistera obtusifolia, B. orientalis, B. pennellii, B. pinnatisecta, B. pomifera, B. pteridioides, B. puberula and B. reclinata.