taxonID	type	description	language	source
3D5CF34AFF83575AFF76F284FF60B7D8.taxon	materials_examined	Type: — PHILIPPINES. Mindanao. Davao Oriental province, in limestone formation along shaded coast. ca. 10 masl, 14 September 2023, MACBucay 1244 (holotype: PNH!, isotype: HAST)	en	Bucay, Mark Angelo C., Tandang, Danilo N., Chen, Hong-Wun, Tsai, Li-Wei, Rubite, Rosario R., Chung, Kuo-Fang (2025): Morphological and molecular analyses revealed two new species of Begonia sect. Baryandra in the Eastern Mindanao Biodiversity Corridor, Philippines. Phytotaxa 698 (4): 245-256, DOI: 10.11646/phytotaxa.698.4.4, URL: https://doi.org/10.11646/phytotaxa.698.4.4
3D5CF34AFF83575AFF76F284FF60B7D8.taxon	diagnosis	Diagnosis: — Begonia dorisiae resembles B. amparoae, another species in Eastern Mindanao island by its overall foliage size and color and similar male flowers, but differs in having dense, dark brown tomentose hairs on the petioles (vs. sparse red hairs to glabrous in B. amparoae), entire, glabrous leaf margins (vs. denticulate, ciliate margins), tomentose hairs on the abaxial side of lamina (vs. glabrous), rectangular bracts with an inequilaterally acuminate to acute apex (vs. widely ovate, obtuse apex) and crescent shaped capsule wing with rounded apex (vs. rectangular with truncated apex). Other differences are summarized in Table 3. sample photos of the populations from the type locality. Monoecious, lithophytic, perennial, rhizomatous herb with creeping, stout rhizome. Rhizome pale green to light brown, glabrous, and lenticelate, 6.4 – 26 cm × 13 – 25 mm, internodes 6 – 10 mm. Stipules persistent, light pink, triangular, asymmetric 15 – 19 × 8 – 12 mm, herbaceous, glabrescent, keeled, margin entire, apex acute to acuminate. Leaves alternate; petioles terete, fleshy, generally ascending, light green to yellowish, 8 – 22 cm × 5 – 8 mm, with tomentose dark brown hairs with a bulbous base; lamina asymmetric, broadly elliptic, 11.1 – 17.2 cm from point of attachment to apex, 17 – 20 cm from basal lobes to tip, 15.3 – 20.6 cm wide, base cordate, 10 – 15 cm wide, mostly overlapping; margins glabrous, entire to shallowly repand, apex acute to attenuate, adaxial surface green, glabrous, abaxial surface light green, with setose dark brown hairs with a bulbous base more concentrated on the veins, venation 7 – 8 palmate, dichotomously branching, slightly raised in both surfaces. Inflorescence axillary, bisexual, 13 – 19 cm long, protogynous cyme, monochasially branching 6 – 10 times; peduncle erect, pale green, 9.6 – 13.7 cm long, glabrous; bracts caducous, elliptic, light green, lowest pair 7 – 9 × 3 – 5 mm, glabrous, apex inequilaterally acuminate to acute, margin entire. Staminate flowers: pedicel 16 – 20 mm long, light pink, glabrous, tepals 4; outer tepals 2, orbicular to elliptic, white to light pink, 10 – 13 × 7 – 11 mm, glabrous, apex rounded, margins entire; inner tepals 2, obovate to lanceolate, pink, 6 – 9 × 4 – 5 mm, glabrous, apex cordate, margin entire; androecium zygomorphic, 3.5 – 3.6 mm across; stamens 35 – 42, filaments 2 – 3 mm long, united at base; anthers obovoid, apex rounded. Pistillate flowers: pedicel 10 – 19 mm long, glabrous; tepals 4; outer tepals 2, orbicular, white to light pink, 9 – 10 × 8 – 13 mm, apex rounded, margins entire, glabrous; inner tepals 2, lanceolate, 9 – 10 × 5 – 7 mm, pink, apex rounded, margins entire, glabrous; styles 3, yellow to light green, ca. 2 mm long, united at base; stigmas spiral and densely setose-papillose, pale green, oblong in general outline; ovary: locular part oblong, rounded apex and base, green, 9 – 12 × 5 – 6 mm, 3 - locular, placentae axial bifid, glabrous; with three subequal crescent wings with obtuse base, and rounded sometimes truncate apex; Capsule: locular part rounded to oblong, subequal wings, abaxial wing crescent shape, apex rounded, base obtuse, 12 – 17 × 9 – 11 mm.	en	Bucay, Mark Angelo C., Tandang, Danilo N., Chen, Hong-Wun, Tsai, Li-Wei, Rubite, Rosario R., Chung, Kuo-Fang (2025): Morphological and molecular analyses revealed two new species of Begonia sect. Baryandra in the Eastern Mindanao Biodiversity Corridor, Philippines. Phytotaxa 698 (4): 245-256, DOI: 10.11646/phytotaxa.698.4.4, URL: https://doi.org/10.11646/phytotaxa.698.4.4
3D5CF34AFF83575AFF76F284FF60B7D8.taxon	distribution	Distribution and Ecology: — The species was found thriving on shaded rocky surfaces along cliffsides near the shore. The species was observed only on its type locality in Caraga, Davao Oriental (Fig. 3).	en	Bucay, Mark Angelo C., Tandang, Danilo N., Chen, Hong-Wun, Tsai, Li-Wei, Rubite, Rosario R., Chung, Kuo-Fang (2025): Morphological and molecular analyses revealed two new species of Begonia sect. Baryandra in the Eastern Mindanao Biodiversity Corridor, Philippines. Phytotaxa 698 (4): 245-256, DOI: 10.11646/phytotaxa.698.4.4, URL: https://doi.org/10.11646/phytotaxa.698.4.4
3D5CF34AFF83575AFF76F284FF60B7D8.taxon	etymology	Etymology: — The specific epithet dorisiae is a tribute to broadcaster Doris Bigornia whose name became an informal, yet very useful monicker of the genus Begonia especially for local communities. Many Filipino botanists, particularly in this series of expeditions, find that the easiest way to make citizens remember the genus Begonia is to associate it with ‘ Bigornia’. Across different islands and demographics, the best way to capture citizens’ interest when communicating the biology of Philippine Begonia is, in fact, Doris Bigornia. Phenology: — The species is observed to be flowering during the months of July to August. Proposed Conservation Status: — The species is observed to have a restricted Area of Occupancy (AOO) on its type locality only covering less than 500 square metres. Other limestone areas along the coasts were assessed but no other populations of the plant were observed. Around 300 individuals were found, most are mature individuals and are attested to be stable in numbers by nearby local communities. The type locality is not foreseen to be in danger of immediate human activity encroachment or further degradation. The only possible threat to the population is possible clearing of the beach vegetation over the limestone formation which is not foreseen to happen in the near future as the vicinity is protected by a local church. Despite this stability, we recommend the species to be listed as Vulnerable D 1 D 2 by having <1,000 mature individual count (D 1) and restricted AOO that may be threatened in the future especially the possible typhoon effects on the area, given that the populations observed where just few meters away from the coast (D 2).	en	Bucay, Mark Angelo C., Tandang, Danilo N., Chen, Hong-Wun, Tsai, Li-Wei, Rubite, Rosario R., Chung, Kuo-Fang (2025): Morphological and molecular analyses revealed two new species of Begonia sect. Baryandra in the Eastern Mindanao Biodiversity Corridor, Philippines. Phytotaxa 698 (4): 245-256, DOI: 10.11646/phytotaxa.698.4.4, URL: https://doi.org/10.11646/phytotaxa.698.4.4
3D5CF34AFF845758FF76F15AFCA3B724.taxon	materials_examined	Type: — PHILIPPINES. Mindanao. Davao Oriental province, in rocky walls inside forest formation along cliffside. ca. 400 masl, 14 September 2023, MACBucay 1247 (holotype: PNH!, isotype: HAST!) Diagnosis: — Begonia medinae resembles B. elmeri, another species originally described in Agusan del Norte, also part of the Eastern Mindanao Biodiversity Corridor. Both species are the only peltate species described from the island to date. However, B. medinae is significantly different from B. elmeri in terms of vestition. A distinctive character of B. medinae is the dense white pilose hairs on the lamina (vs. glabrous to sometimes sparsely ciliate in B. elmeri). Begonia medinae also has the same hairs in the petioles (vs. fulvus hairs), and peduncle (vs. glabrous). Other differences are summarized in Table 4. Monoecious, lithophytic, perennial, rhizomatous herb with creeping, stout rhizome. Rhizome brown to dark red, glabrous, lenticelate, 14 – 24 cm × 6 – 11 cm, internode 7 – 10 mm. Stipules persistent, cream, ovate, 13 – 22 × 5 – 9 mm, herbaceous, glabrescent, keeled, margin entire, apex acute to acuminate. Leaves alternate; petioles terete, fleshy, dark red, 11.4 – 19.3 cm × 3 – 6 mm, with pilose white hairs; lamina asymmetric, ovate to elliptic, 6.3 – 12.3 cm from point of attachment to apex, 8.9 – 18.3 cm from basal lobes to tip, 8 – 12 cm wide, margins entire, with white dense pilose hairs, apex obtuse to rounded, peltate, adaxial surface dark green to dark red, with dense pilose to strigose white hairs, abaxial surface dark red, with pilose to strigose white hairs, venation 7 – 8 palmate, lighter coloration along the veins, dichotomously branching, slightly raised in both surfaces. Inflorescence axillary, bisexual, 27.4 – 38.9 cm long, dichasial cyme, dichotomously branching 7 – 10 times; peduncle erect, reddish at base, pale green to white at tip, 24.2 – 31.9 cm long, sparse pilose white hairs; bracts caducous, white to transluscent, keeled, lowest pair 2 – 3 × 2 – 3 mm, glabrous, apex acuminate, margin entire. Staminate flower: pedicel 18 – 22 mm long, light brown to light pink, glabrous, tepals 4; outer tepals 2, orbicular, pink, 12 – 16 × 11 – 16 mm, glabrous, apex round, margins sinuate; inner tepals 2, oblanceolate, pink, 9 – 12 × 5 – 7 mm, glabrous, apex cordate, margin entire; androecium zygomorphic, 2 – 3 mm across; stamens 28 – 32, filament 0.5 – 0.6 mm long, united at base; anthers obovoid, apex rounded. Pistillate flowers: pedicel 10 – 11 mm long, glabrous; tepals 4; outer tepals 2, obovate, light pink, 10 – 11 × 10 – 11 mm, apex rounded, margins entire, glabrous; inner tepals 2, oblanceolate, 5 – 7 × 5 – 6 mm, pink, apex rounded, margins entire, glabrous; styles 3, light green, 4 mm long, united at base; stigmas, spiral and densely setose-papillose, yellow; ovary: locular part ellipsoidal, apex rounded, base cordate, white, 6 × 4 mm, 3 - locular, placentae axial bifid, glabrous, with three subequal cup-shaped wings, abaxial wing slightly bigger than both lateral wing, base rounded to truncate, apex rounded to truncate, light pink to white; Capsule: trigonous-ellipsoid, with subequal wings, abaxial wing elongatedtriangular, apex truncated, base acute, lateral wings, same shape but smaller than abaxial wing, base rounded to obtuse, 12 – 28 × 45 – 11 mm.	en	Bucay, Mark Angelo C., Tandang, Danilo N., Chen, Hong-Wun, Tsai, Li-Wei, Rubite, Rosario R., Chung, Kuo-Fang (2025): Morphological and molecular analyses revealed two new species of Begonia sect. Baryandra in the Eastern Mindanao Biodiversity Corridor, Philippines. Phytotaxa 698 (4): 245-256, DOI: 10.11646/phytotaxa.698.4.4, URL: https://doi.org/10.11646/phytotaxa.698.4.4
3D5CF34AFF845758FF76F15AFCA3B724.taxon	distribution	Distribution and Ecology: — The species is observed further inland, thriving on shaded rocky areas near a cliff leading to a river. The species is found only on the type locality in Caraga, Davao Oriental (Fig. 3).	en	Bucay, Mark Angelo C., Tandang, Danilo N., Chen, Hong-Wun, Tsai, Li-Wei, Rubite, Rosario R., Chung, Kuo-Fang (2025): Morphological and molecular analyses revealed two new species of Begonia sect. Baryandra in the Eastern Mindanao Biodiversity Corridor, Philippines. Phytotaxa 698 (4): 245-256, DOI: 10.11646/phytotaxa.698.4.4, URL: https://doi.org/10.11646/phytotaxa.698.4.4
3D5CF34AFF845758FF76F15AFCA3B724.taxon	etymology	Etymology: — The specific epithet “ medinae ” is to acknowledge the Filipino entomologist Dr. Milton Medina who originally observed this Begonia during their biodiversity studies in the area. This also commemorates their efforts in their conservation studies of the Philippine biodiversity, particularly the ecosystems in Davao Oriental province and the whole of Mindanao Island. Phenology: — The species is observed to be flowering during the months of August to September. Proposed Conservation Status: — The species is observed to have a very limited population. Residents who stayed in the locality for decades have not documented the species outside the locality and observed declining individuals of the plants (A 2 a). Less than 100 individuals were found, only about half are mature individuals (C 2 ai). The type locality is foreseen to be in danger of future degradation as trail clearing for trekking may devoid the plants with shade, and the plants’ appearance might subject it to possible exploitation (A 2 d). The species is observed to have a restricted Area of Occupancy (AOO) on its type locality only covering less than 100 square metres. Other rocky areas along the forests where assessed but no other populations of the plant were observed (B 2 aii, iv, v). We then recommend the species to be listed as Critically Endangered A 2 ad, B 2 aii, iv, v, C 2 ai.	en	Bucay, Mark Angelo C., Tandang, Danilo N., Chen, Hong-Wun, Tsai, Li-Wei, Rubite, Rosario R., Chung, Kuo-Fang (2025): Morphological and molecular analyses revealed two new species of Begonia sect. Baryandra in the Eastern Mindanao Biodiversity Corridor, Philippines. Phytotaxa 698 (4): 245-256, DOI: 10.11646/phytotaxa.698.4.4, URL: https://doi.org/10.11646/phytotaxa.698.4.4
