Begonia wallichiana Lehm., E. Otto, Neue Allgem. Deutsche Gartennnd

Radbouchoom, Sirilak, Chen, Wen-Hong & Shui, Yu-Min, 2017, Begonia glutinosa, a new synonym of Begonia wallichiana (Begoniaceae) with additional notes on this species, Phytotaxa 326 (1), pp. 77-82 : 80

Begonia wallichiana Lehm., E. Otto, Neue Allgem. Deutsche Gartennnd – Blumenzeitung 6: 455 (1850)

— Begonia franconis Liebm., Vid. Medd. Naturh. For. Kjöbenhavn 1852, p. 21 , 1853.

— Begonia glutinosa Kiew, R. Kiew , Adansonia . sér.3. 29:230 (2007). Type: Vietnam. Tonkin: Caï-kin, cultivé aux serres du Museum, 1917, Bois s.n. (holotype, P00539150 , P!; isotype, P00539152 , P!). syn. nov.

— Begonia modesta Liebm., Vid. Medd. Naturh. For. Kjöbenhavn 1852, p. 20 , 1853.

— Begonia parviflora Liebm. , in Schouw., Ind. Sem. Herb. Haun., 1847, later homonym, non Poepp. & Endl., 1835.

— Diploclinium wallichiana Miquel, Fl. Ned. Ind. , 1.1: 690, 1856.

— Doratometra wallichiana Klotzsch, Monatsber. Möngl. Preuss. Akad. Wiss. Berlin , 126, 1854.

Diagnostic description: —Herbs, annual, rhizomatous. Petioles 5–11 cm long, densely viscid hair. Stipules pale green, lanceolate. Stem ca. 40–60 cm long tall, inter-node, 4–7 cm long, reddish pale green, viscid hair. Leave blade asymmetric, widely ovate or elliptic, base oblique-cordate, apex acuminate, margin denticle, adaxially bright green, abaxially paler than adaxially surface; venation palmate-pinnate with 6–8 primary veins, 2–3 secondary vein. Inflorescence axillary, dichasium; bracts pale green, lanceolate, deciduous. Flowers white, inside glabrous, outside with viscid hair. Staminate flower: tepals 4; androecium actinomorphic; filaments unequal; anthers with longitudinal pore slits. Pistillate flowers: tepals 5, elliptic, inner tepal 1, smaller than outside tepals 4; style 3, fused at base, forked once; stigma spirally twisted. Fruits: wings 3, slightly unequal, placentation axillary, placentas 1 per locule.

Examined specimens: — AMERICA: Mexico. Bartholomew B. 3485 (0371998 KUN!, 01393429 PE!), Cortes L. 415 (01393430 PE!), Munn-Estrada X. 583 (255770 USF!), Croat T. B. & Hannon D. P. 62968 (258245 USF!). ASIA: China, Qiu B. Y. 781399 (0371995 KUN!), Anonymous. s.n. ( KUN 0371997 KUN!). Vietnam, Bois D. s.n. ( Begonia glutinosa Kiew , holotype, P00539150 , P!; isotype, P00539151 , P!, P00539152 P!, other material, P00539149 P!, P05618172 P!), Anonymous. s.n. ( P05618173 P!) .

Notes: —After thorough investigation of living plants of B. wallichiana in the greenhouse of Kunming Botanic Garden ( S. Radbouchoom 24, KUN; Fig. 1 ) and the type materials of B. glutinosa (holotype, P 00539150, P! & isotype, P 00539152, P!) we noted the following.

The diagnostic characters of B. wallichiana and B. glutinosa were shared on the living plant and type specimens ( Fig. 3 ; Smith et al. 1986, Doorenbos et al. 1998, Kiew 2007). Thus, we confirmed that B. glutinosa is a new synonym of B. wallichiana . Here, the collection information (cultivé aux serres du Museum) also reveals that B. wallichiana in Begonia sect. Doratometra is an introduced species instead of a native species in Vietnam. Additionally, some American species of Begonia have been reported to be introduced and naturalized to Ceylon of Asia, such as Begonia hirtella Link (1822: 396) , B. humilis Aiton (1789: 353) in B. sect. Doratometra , Begonia cucullata var. hookeri Smith and Schubert (1941: 104) in B. sect. Begonia (1859: 123) and Begonia ulmifolia Wild. (1805: 418) in B. sect. Donaldia (Klotzsch) A. DC. (1859: 127) ( Gagnepain1921, Doorenbos 1975, Dassanayake et al. 1983, Ho 1991, 1999).

Figures

FIGURE 1.The plants and flowers of Begonia wallichiana Lehm.(S. Radbouchoom 24, KUN) A. Habit; B. Stem; C. Leaf adaxial surface, side view; D. Leaf adaxial view; E. Leaf abaxial view; F. Bisexual Inflorescence; G. Staminate flower, front view; H. Staminate flower, side view; I. Staminate flower, back view; J. Pistillate flower, face view; K. Pistillate flower, side view; L. Pistillate flower, back view.

FIGURE 3. Type specimens and their close up of flowers and fruits in the type materials of Begonia glutinosa Kiew. A. Holotype, B. Isotype, C. Staminate flower, D. Pistillate flower, E. Leaf. (A and B from https://science.mnhn.fr/taxon/species/begonia/glutinosa#kiew. D. based on P00539148, P!; C, E based on P00539149, P!).