Begonia ostulensis (Begoniaceae), a new species from Michoacán, Mexico Author Martínez-Gordillo, Martha Herbario de la Facultad de Ciencias (FCME), Universidad Nacional Autónoma de México, Apartado Postal 70 - 399, 04510 Coyoacán, Mexico City, Mexico. Author Ramos-Ordoñez, María Felix Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Av. de los Barrios 1, Los Reyes Iztacala, 54090, Tlalnepantla, Estado de México, Mexico. text Phytotaxa 2022 2022-04-08 543 1 89 94 http://dx.doi.org/10.11646/phytotaxa.543.1.9 journal article 56059 10.11646/phytotaxa.543.1.9 280817d4-54ff-4004-b90a-f4aa873d77a7 1179-3163 6424410

TABLE 1. Comparison of the main morphological characters among Begonia ostulensis and B. monophylla.

Character	Begonia ostulensis	Begonia monophylla
Tuber size (width, cm)	0.3–0.7	1.5–3
Plant height (cm)	ca. 20	up to 50
LEAF
Stipules	fugaceous	persistent
Number of leaves	1	1 or more
Leaf shape	orbicular	suborbicular, elliptic-reniform or broadly ovate
Petiole length (cm)	0.5–2.7	absent or when present up 2.6
Petiole insertion	peltate	non-peltate
Blade size (cm)	2.1–11 × 2.1–11	5.8–28 × 7.5–37.9
Base	peltate	cordate
Margin	lobed, double-dentate, non-ciliate	incised-dentate, ciliate, occasionally lobed
Lower surface	glabrous	pubescent
Upper surface	glabrous	sparsely pubescent
INFLORESCENCE
Number of flowers/node	1	1–2
Length (cm)	3.5–18	4.7–32
Peduncle	glabrous	pubescent
STAMINATE FLOWER
Tepals	4	4
Apex	rounded or acute	rounded or acute
Staminate flower tepal Margins	entire	finely crenulate distally
PISTILLATE FLOWER
Pedicel length (mm)	0.4–2.7	12–14.6
Tepals	5	5
Apex	rounded	acute to widely rounded
Tepal margins	entire	finely crenulate distally
FRUIT
Fruit shape	oblong	oblong
Wings	unequal	subequal
Wing shape	asymmetrically triangular	asymmetrically triangular