Tap. 8179. 
P YRUS Tscuonosku. 
Japan. 
RosaceaE. Tribe PomEan, 
Pyrus, Linn.; Benth. et Hook. f. Gen. Plant. vol. i. p. 626. 
Pyrus Tschonoskii, Maxim. Mé/. Biol. pars ix. p.165; Bull. Acad. Pétersb. 1874, 
vol. xix. p. 169; Sargent, For. Fl. Japan, p. 40, t. 14; P. yunnanensi, 
Franch., affinis, sed inflorescentiis paucifloris, foliis fructibusque majoribus 
et calyce persistente distincta. ~ 
Arbor 10-12 m. alta, trunco 30 cm. diametro, cortice laevi pallido, coma 
angusta rotundata; ramuli teretes, crassiusculi, primo laxe incano- 
tomentosi, deinde nigrescentes, lenticellis sparsis punctiformibus. 
Gemimae hibernantes ovoideae, obtusae, 5 mm. longae, perulis latis 
castaneis vel aurantiaco-rubescentibus dense ciliatis. Folia late ovata, 
acuta vel acute acuminata, basi rotundata, irregulariter dentata dentibus 
glandulosis, 5-12 em. longa, 3-5-7 cm. lata, firma, supra primo floccoso- 
villésa, demum glabrata, viridia, infra albo-tomentosa. matura subglabrata, : 
pallida, nervis lateralibus utrinque 6-10 rectis valde obliquis; petioli 
graciles, 2-8 cm. longi. /tacemi umbelliformes 4—6-flori, incano-villosuli ; 
pedicelli 1-1°5 cm. longi. eceptaculum campanulato-obeonicum, incano- 
villosulum, 5 mm. longum. Cu/ycis dentes ovati, acuti, 3 mm. longi, dorso 
incano, facie copiose albo-villosi, sub anthesi patentes, deinde erecti eum 
fructu persistentes. Peia/u alba, apicem versus roseo-suffusa, circiter 
12 mm. Jonga. Sfumina circiter 40. Styli 5, basi coaliti, infra medium 
albo-villosi. /ructus globosus vel globoso-obovoideus, ad 2°5 cm. diametro, 
viridi-flavescens, uno latere rubescens, lenticellis pallidis verruculosus, 
sapore austero, carne granulis duris permeata—Vriolobus Tschonoskii, 
Rehder in Sargent, Trees and Shrubs, vol. i. p. 73, t. 37. 
This is apparently a rare tree in Japan, so far only found 
in woods in Central Hondo. It was named after T'schonoski, 
one of Maximowicz’s collectors, who discovered it at Siba- 
sirl at the foot of Fujiyama; subsequently in 1892 it 
was collected near Nikko and at the foot of Asamayamo 
north of Tokio by Professor Sargent, who introduced the 
tree into the Arnold Arboretum and, in 1897, presented 
plants to Kew. It belongs to the section Hriolobus which 
was originally proposed as a genus by Roemer and recon- 
stituted as such by Rehder, l.c., who includes in it four 
species, all Asiatic. 
Descriprion.—A tree, 30-40 ft. high, trunk 1 ft. in 
diam. ; bark smooitli, pale; young branchlets whitish- 
Fesruaky, 1908. 
