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Detaylı Bibliyografya
Asıl Yazarlar:	Murillo-Serna, Jhon S., Sierra-Giraldo, Julio Andres, Orozco-A, Jairo Andrés, Posada-Herrera, Juan Mauricio
Materyal Türü:	Recurso digital
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Baskı/Yayın Bilgisi:	Zenodo 2025
Konular:	Biodiversity Taxonomy Plantae Tracheophyta Magnoliopsida Myrtales Melastomataceae Allomaieta Allomaieta peltata
Online Erişim:	https://doi.org/10.5281/zenodo.19371992
Etiketler:	Etiketle Etiket eklenmemiş, İlk siz ekleyin!

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Allomaieta peltata J.S.Murillo, Posada-Herrera, Orozco-A, Sierra-Giraldo, sp. nov. (Figs. 3–4, 5)Type:— COLOMBIA. Caldas: municipality of Samaná, vía entre El Congal, La Quiebra y Florencia, 5°36’11.3’’-75°00’59.4’’, 1373 m, 20 July 2020 (fl, fr.), J.A. Orozco-A, J.A. Sierra-Giraldo 1130 (holotype: FAUC!; isotype: HUA barcodes [HUA0047616]!, [HUA0047615]).Diagnosis:— An Allomaieta species characterized by the combination of peltate leaves and flowers with petals 1.4–1.8 × 1.5–1.6 cm, white with hyaline stripes. Allomaieta peltata is similar to A. melidae and A. strigosa but differs from them by its peltate leaves (vs marginal petioles in A. strigosa and A. melidae), and white petals with hyaline stripes (vs. reddish-purple with violet stripes in A. strigosa, and light pink with violet stripes in A. melidae),Shrub 3–5 m tall. Stems, petioles and inflorescences covered by bulla-based trichomes ca. 1 mm long. Internodes 1.6–14.6 cm long, 2.6–3.9 mm diam., terete, nodes not swollen. Leaves opposite, anisophyllous, the smaller one up to 60% reduced, peltate, with the petiole attached 1.5–8 mm from the basal edge, petioles 1.1–5.6 cm long, 0.9–2.5 mm diam., terete; leaf blades, 5.1–23.8 × 4.2–12.1 cm, papyraceous, elliptic, ovate-elliptic or ovate, base rounded, apex acuminate or cuspidate, margin crenate and slightly revolute with elongated trichomes 0.5–1.1 mm long; venation acrodromous, with 3 pairs of lateral veins (included the inconspicuous marginal pair), 29–40 tertiary veins adjacent to the middle vein (inside the innermost pair), 2–9 mm apart; primary, secondary and tertiary veins raised on the abaxial surface and impressed in the adaxial surface; adaxial surface covered by elongated trichomes without enations ca. 0.5 mm long, smooth 0.5–1.8 mm long on the mid vein and in the insertion of petiole, the abaxial with primary and secondary veins covered by elongated trichomes 0.5–0.7 mm long, tertiary veins and surface pubescent with thin elongated trichomes of 0.2–1 mm long and short dark sessile gland trichomes ca. 0.02 mm long. Inflorescences 6–11.1 cm long, terminal, compound cyme with monochasial paracladia bearing 4–5 flowers, peduncle 13.2–34.4 mm long, rachis 29.2–72.3 long, first internode 12.4–28.3 mm long, first paracladia 40–73 mm long, 16–34 flowers for inflorescence; proximal bracts 2.5–2.7 × 0.3–0.4 mm, linear, covered by brown bulla-based trichomes; bracteoles 2-3 per flower, 2.9–6.2 × 0.3–0.4 mm, sessile, linear, covered by brown bulla-based trichomes, deciduous during anthesis. Flowers 5-merous, haplostemonous; pedicel ca. 1 mm long. Hypanthium ca. 4 mm long up to the torus, ca. 5 mm diam in the torus, obconical, covered by bulla-based adpressed trichomes 0.4–0.6 mm long. Calyx closed in bud, ca. 10 mm long, ca. 6 mm diameter, opening by 4–5 regular triangular-valves, deciduous in anthesis, internally glabrous, externally such as the hypanthium; relictual tube 0.4–0.6 mm long. Petals white with hyaline longitudinal lines at anthesis or occasionally pale pink with purple lines at anthesis, 14–18.4 × 12.4–16.2 mm, cuneiform, apex obcordate or emarginate, margin entire, glabrous. Stamens 5, isomorphic, antesepalous, surrounding the style on one side, causing a slight zygomorphy appearance in anthesis; filaments 3.5–5 × 0.3–0.7 mm, pale yellow; anthers 3.4–4 × ca. 1 mm, oblong, apically obtuse, yellow, pore ca. 0.3 mm wide, located in a ventral canal ca. 0.4 mm from the apex. pedoconnective absent, connective not extended below the thecae. Ovary 5-celled, totally inferior, apex glabrous, 1.4–2.5 × 2.2 mm in longitudinal section, hypanthium diameter in the middle of the ovary locules ca. 3 mm; style recurved, 4.1–5.7 mm long, base ca. 0.5 mm diam, apex ca. 0.8 mm diam, glabrous; stigma ca. 0.8 mm diam, truncated, covered with bearded trichomes. Capsule pale green before dehiscence, subspherical to cupuliform, 5.7–6.3 x 6.1–6.7 mm; pedicel 2.2–3.2 mm long. Seeds 0.6–0.8 x 0.3–0.4 mm, cuneiform, raphal zone apically extended, and testa papillose.Distribution, ecology and phenology:— Allomaieta peltata is known only from the Central Cordillera of the Colombian Andes, occurring at elevations between 1350 and 1700 m (Figure 5.). It grows in the understory of dense montane forests. This species has been collected with flowers, flower buds, and fruits in February, March, and July. The flowers have a sweet smell and are visited by Curculionidae beetles.Conservation status: — Allomaieta peltata is known only from two locations: one population grows in an unprotected area experiencing continuous forest cover loss due to livestock activities, while the other population is located within the protected area of Selva de Florencia National Natural Park. According to the current collections and known populations, this taxon has an EOO of 9.3 km ² and an AOO of 12 km ². This species is considered at risk due to its narrow distribution and its specialized and threatened habitat. Based on current knowledge, we propose assigning the provisional category ‘Endangered’ (EN) B1a+B2a(ii,iii,v), as most occurrences are recorded outside protected areas where vegetation cover is consistently declining (IUCN 2024).Etymology:—The epithet refers to the peltate leaves, a unique trait of this species within Allomaieta.Additional specimen examined (paratypes):— COLOMBIA. Caldas: municipality of Samaná, corregimiento de Florencia, vía entre Florencia y El Congal, 5°36’11.3’’-75°00’59.4’’, 1373 m, 20 July 2020 (fl), J.A. Sierra-Giraldo & A. Orozco-A 1493 (FAUC! HUA!), Parque Nacional Natural Selva de Florencia, Las Mercedes, parte inferior del cerro Pelahuevos, 5°29’4.2’’-75°2’42.2’’, 1680 m, 22 Feb 2018 (fl), A.N. Castaño 2173 (FAUC!), vereda San Lucas, microcuenca Las Mercedes, camino hacia San Antonio, 5°31’5.0694’’ -75°2’40.0488’’, 1485 m, 20 Feb 2018 (fr), A.M. Rosero-Céspedes 10 (FAUC!), corregimiento de Florencia, vía Norcasia-Florencia, 10 minutos antes del casco urbano,5°31’8.54’’ -75° 2’3.64’’, 1500 m, 30 Mar 2021 (fl, fr), J.M. Posada & A.N. Castaño 1128 (FAUC!).Notes:— Allomaieta peltata resembles A. strigosa and A. melidae by the strigose indument, but A. peltata is the only known species within Allomaieta that has peltate leaves (vs marginal petioles in the remaining species of Allomaieta), white flowers (vs heliotrope in A. strigosa and light pink in A. melidae). Additionally, A. peltata has leaf blades with usually cuspidate apex, inflorescences more branched and different size petals. Comparison between species with strigose indument are provided in Table 1.In Allomaieta, the petals may be white or, more commonly, bicolored to varying degrees, typically with a purple to pink outer region and a yellow or white center, sometimes with a gradual transition of color toward the middle (Michelangeli et al. 2011, Michelangeli et al. 2022). Of the 13 known species of Allomaieta, only A. ebejicosana Lozano in Lozano & Becerra-de-Lozano (1999: 17), A. peltata, and A. zenufanasana Lozano in Lozano & Becerra-de-Lozano (1999: 12) have petals that are entirely or almost entirely white. In addition to its peltate leaves, A. peltata is characterized by a strigose indumentum on branches, petioles, inflorescences, and floral buds (vs. hispid trichomes in A. ebejicosana and A. zenufanasana). Finally, A. peltata is not sympatric with the other white-flowered species of Allomaieta (Lozano & Becerra-de-Lozano 1999, Mendoza-Cifuentes 2018, Murillo-Serna & David-Higuita 2021, Murillo-Serna et al. 2025).

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