大楊桐 （新種）是一種植物的名稱。
大楊桐（新種）
Adinandra grandis L. K. Ling, sp. nov.
Haec species ubique glabro, gemmis terminalibus imprimis glabris, laminis magnis. Floribus magnis, vulgo 2-3 axillaribus, staminibus 45-50, ovario 4-6-loculari, stylo simplici, furcata facile distinguitur omnino. ceteris speciebus, valde affinis A. laoticae Gagnep. （Super laoticam）sed a qua faciliter differt laminis subtus dense russis subtile punctulatis, staminibus circa 50.
Arbor 13-20 m alta, ubique glabra; rami cylindrici, ramulis griseo-brunneis, hono-tini infuscanti（brunne）; gemmae terminales magnae, longo-conicae, circa 2 cm longae. Folia alterna coriacea, paulo crassa, oblongo-elliptica, 13-18 cm longa, 5.5-8.5 cm lata, apice breviter caudata vel subobtusa, basi cuneata, integra; siccitate supra interse viridia, opaca, subtus viridula, dense opaca russa subtili punctulata, costis supra apulis impressis, subtus elevatis, nervis lateralibus utrisecus 13-16, siccitate supra subtusque inconspicuis vel interdum paulo conspicuis; petioli robusti, 1.2-2 cm longi. Flores mag-ni, inaperli, vulgo 2-3 axillares vel e ramulis foliorum delapsorum crescentes; pedicelli 1-1.8 cm longi; cernui bracteolae 2, deciduae, triangulari-ovatae, circa 2 mm longae; sepala 5, crassa, ovato-rotunda, 8-10 mm longa integra, membranacea ; petala 5, alba, rotundata vel subrotundata, 10-14 mm diam. , apice rotunda, extus glabra; stamina 46-50, 7-10 mm longa, filamenta 2-3 mm longa, vix basi paulo connata, basi corollarum inserta, glabra, antheris lineari-oblongis, 5-7 mm longis, pilosis, apice conplanatis, inapiculatis; ovarium ovoideum glabrum, 4-6-loculare, ovulis in quoque loculis plurim-is, stylo simplica, circa 5 mm longo, glabro. Fructus ignotus.
Yunnan: Yuanyang Xian（元陽縣）, Feng-chun Lin（逢春嶺）, alt. 900-1450 m, in forest, June, 8, 1974, tree, 20 m. high, flowers greenish, Luchun Dui（綠春隊）1714 (type PE); Jinping Xian（金平縣）, alt. 1450 m, Aug. 18, 1957, tree, 13 m high, Mao Ping-yi（毛品一）400.
