Lae, 83292. 
PTEROSTYRAX uisprpum. 
Japan. 
STYRACEAE. 
PTEROSTYRAX, Sieb. ef Zucc. Fl. Jap, vol. i. p. 94. 
Pterostyrax hispidum, Sieb. et Zucc. in Abh. Akad. Muench. vol. iv. pars iii. 
p. 182; Carriére in Rev, Hort. 1875, p. 307, fig. 50, et 1876, p. 394, fig. 48, 
84; Franch. et Savat. Enum. Pi. Jap. vol. i. p. 810; Peters in Engler, 
Pflanzenr.—Styracaceae, p. 103 (hispidus); affinis P. corymboso, Sieb. et 
Zuce., sed floribus in paniculo angusto elongato dispositis et fructu 
distinguenda. 
‘Arbor ramis glabris et cortice cinereo-brunneo. Folia alterna, exstipulata, 
petiolis 1-2-5 em. longis, laminis 6-21 cm. longis, 3-10 cm. latis ellipticis 
acutis vel breviter acuminatis basi ecutis denticulatis supra viridibus 
subtus pallidioribus et glabris vel minutissime albido-tomentosis secus 
venis pubescentibus. Panicu/i axillares, 10-16 em. longi, 4-5 cm. lati, 
adscendentes vel penduli, basi 2-3-foliati, superne ebracteati, pilis patulis 
pubescentes, ramis patentibus 1°5-2 cm. longis bifurcatis secundifloris, 
floribus subconfertis. Pedicelli 1-2 mm. longi. Calyx obconicus, pluri- 
costatus, 5-dentatus, minute albo-tomentosus, dentibus 1-1°3 mm. longis 
deltoideo-ovatis acutis. Corolla fere ad basin 5-partita, utrinqgue minute 
subtomentosa, alba, lobis 8 mm. longis 3-3°5 mm. latis patentibus vel 
recurvis elliptico-oblongis obtusissimis. Stamina 10, 1-11 em. longa, 
filamentis pubescentibus basi in tubo connatis; antherae lineari-oblongae, 
dorsifixae. Ovarium inferum, 3-loculare, loculis 4-ovulatis; stylus 
staminibus longior, basi conico-incrassatus, pubescens. Ovula medio 
axi affixa, 2 superioribus erectis 2 inferioribus pendulis. Fructus 1 em. 
longus, 2°5 mm. crassus, subclavato-fusiformis, pluri-costatus, haud 
alatus, dense hispidus, stylo terminatus.—Halesia hispida, Mast. in Gard. 
Chron. 1884, vol, xxii. p. 176, fig. 34, et 1909, vol. xlvi, p. 89; Shirasawa, 
Ic. Jap. vol. ii. t. 65, fig. 1-3.—N. E. Brown. 
The genus Pterostyraz, to which the subject of our plate 
belongs, is so nearly allied to Halesia, Linn., and so similar 
to that genus in floral characters, that in the Genera Plan- 
‘ttarum the two were united by Bentham and Hooker. But 
the position of the inflorescence, the absence of broad wings 
on the fruit, the shape of the corolla and the difference 
in number of corolla lobes so markedly distinguish Ptero- 
styraz and Halesia that the two are now, by almost universal 
‘consent, kept apart. The two groups inhabit different areas, 
for while Halesia is an American genus, Pterostyrax is 
Aveust, 1910. 
