Acer in Formosa — Li 
293 
tutcheri Duthie var. shimadai Hay. Another 
variety with 3-lobed leaves, described from 
the neighboring province Fukien, should be 
considered as a distinct species: A. johned- 
wardianum Metcalf (1942: 221). {A, wilsonii 
Rehder var. serrulatum Dunn in Linn. Soc. 
London, Jour., Bot. 38: 358, 1908; A. oliv- 
erianum Pax var. serrulatum (Dunn) Rehder 
in Sarg., PL Wils. 1: 90, 1911; non A. serrula- 
tum Hay.). A. oliverianum occurs from eastern 
to southwestern China, while A. johnedward- 
ianum is localized in Fukien. It differs from 
the former in the 3-lobed leaves, which are 
glabrous and rounded at base, and in the 
smaller fruits, which are arranged in a slender 
corymb. 
9. Acer palmatum Thunb. var. pubescens var. 
nov. 
Acer duplicato-serrulatum Hay. (1911: 70). 
Acer palmatum Thunb. subsp. matsumurae 
Koidz. var. spontaneum Koidz. subvar. 
formosanum Koidz. (1911^: 50). 
Acer ornatum Carr. var. matsumurae Koidz. 
a. spontaneum (Koidz.) Nemoto subvar. 
formosanum (Koidz.) Nemoto (1936: 
454). 
Acer matsumurae Koidz. var. formosanum 
Sasaki (1930: 324) [nomen nudum]. 
A typo speciei differt ramulis novellis, 
folds utrinque, petiolis, inflorescentiisque 
molliter pubescentibus. 
A small tree, young branchlets slender, 
white-villose-pubescent, becoming glabres- 
cent and glabrous. Leaves to 5 cm. long, 
subcordate, deeply 5-lobed, the base cordate, 
the lobes lance-oblong, acuminate, subdupli- 
cately serrate, villose especially on the veins 
on both surfaces, the lobes parted to beyond 
the middle; petioles glabrous, slender, 2.5 
cm. long, villose-pubescent. Inflorescence in 
small corymbs, densely villose-pubescent at 
first; peduncles 1-2.5 cm. long; pedicels 5-6 
mm. long; sepals slightly purplish, ovate- 
oblong, 2-3 mm. long, more or less glabrous; 
petals slightly smaller than the sepals, white; 
stamens short, included, the filaments about 
1 mm. long, the anthers about equal in 
length; ovary densely villose. 
Endemic to mountain forests at altitudes 
of about 1,600 meters, central and northern 
parts. 
Formosa: Taranan, Bunzan-gun, Taihoku- 
syu, T. Suzuki 17839 (NTU, type); Mt. Tai- 
hei, S. Sasaki, Sept. 2, 1925 (NTU). 
The nomenclature of cultivated and wild 
forms of A. palmatum Thunb., as adopted by 
several Japanese botanists, is very varied and 
confusing. The wild plant growing sponta- 
neously in the mountains of Formosa differs 
from the Japanese plants chiefly in the pubes- 
cence being present not only on the young 
branches and inflorescences, but also on ma- 
ture leaves and petioles. As it is geographi- 
cally isolated from other plants of this species, 
it is here considered as a distinct variety. 
Acer duplicato-serrulatum Hay. is listed as 
a synonym of A. oliverianum var. nakaharai 
= A. serrulatum by Kanehira. This is evidently 
incorrect, as the former has 7-lobed leaves, 
while the latter has 5-lobed leaves. This name 
is not taken up by Fang. However, Koidzumi, 
who had access to Hayata’s type, earlier iden- 
tified this with the wild form of A. palmatum 
from Formosa. The type, as noted by Koid- 
zumi, is a sterile specimen. 
Acer matsumurae Koidz. var. formosanum 
Sasaki was published without description or 
reference, hence is a nomen nudum and in- 
valid. 
EXCLUDED SPECIES 
Acer taiwanense Yamamoto, Soc. Trop. Agr., 
Jour. [Formosa] 5: 180, fig. 6, 1933. 
This name, not listed by Kanehira but by 
S. Suzuki (1936: 129), is, as noted by Fang 
(1939: 246), actually based upon a specimen 
collected in Cochin-China. It should be 
eliminated from the list of plants of Formosa. 
REFERENCES 
Fang, W. P. 1939. A monograph of Chinese 
