Revision of Genus Alstonia — MONACHINO 
145 
cescent-pallid, the margins involute, the lateral 
nerves 30-50 pairs, 2 mm. apart, the reticu- 
lation prominulous on both surfaces. Inflores- 
cence in rather lax many-flowered cymes, gla- 
brous, the peduncles short, 1.5-2 cm. long, the 
pedicels up to 3 mm. long, glabrous; calyx lobes 
ovate, 07-1.4 mm. long, glabrous or sparsely 
puberulent outside, adpressed pubescent inside, 
ciliate; corolla tube 5-6 mm. long, sparsely 
puberulent on upper part outside; corolla lobes 
broadly elliptic, 3-4 mm. long and about 2.5 
mm. broad, puberulent outside, villose inside 
particularly toward base where densely bearded; 
anthers 1-1.5 mm. long, not dehiscing com- 
pletely to base, located at throat of corolla, the 
filaments attached manifestly above middle of 
corolla tube; ovary partly inferior, rounded at 
apex, glabrous or faintly puberulent; stigma- 
apiculi about 0.5 mm. long. Capsule about 1 
cm. in diameter; seeds 9 mm. long and 3 mm. 
broad, the cilia up to 2 cm. long. 
Type. — Wall. Num. List. no. 1607, "Marta- 
bania 1827.” 
Illustrations. — DeLessert, Icon. Select. PL 
(1846) 5: t. 46 (as Winchia calophylla) leafy 
br. and infl., fl. analysis; Sunyatsenia (1935) 
2: 310, fig. 42 (as A. pachycarpa) leafy br., fr. 
Distribution. — China, Burma, Sumatra; re- 
ported frequent or rare, from altitudes of 300- 
1100 m., in forests, woods, thickets, clay cliffs. 
China— Yunnan: C. W. Wang 75807, 77850, 
75927, 79160 A (fr.; A). Hainan: S. K. Lau 
1630 (Ka Chik Shan; fl.; NY, A), 27600 
(Kumyun; fr.; A); Chun and Tso 44317 (type 
coll. A. pachycarpa; A, K, NY, US ) . 
Lower Burma — Wallich 1607 (type coll. 
Winchia calophylla; NY); C. E. Parkinson 
6297 (Mergui, Victoria Point; fl.; K), 6563 
(type coll. A. ro strata; K), 7684 (Mergui; 
fr.; K). 
Sumatra — Boschproefst. 5977 (Res. Sum. 
Westk. ond afd. Loeback Sikaping; L). 
Vernacular names. — Dit Sz Mou (Hai- 
nan), Boelai Pipit (Sumatra), Taung-ma-yo 
( Thaton ) . 
In the selection of the proper specific epithet 
to be employed for the present species consid- 
erable differences in opinion were encountered. 
Therefore the reason for my choice is presented 
at length. 
Alyxia glaucescens G. Don is associated with 
the present species only in Don’s citation of 
Wall. List. 1607. Don’s description and allo- 
cation ("straits of Malaca”) identify his plant 
with Wallich’s species from Penang, the Alyxia 
glaucescens in Roxburgh’s Flora, which is not 
an Alstonia. Whether it be considered a later 
homonym or nomen confusum, or both, or a 
typographical error in accrediting the name to 
himself rather than to Wallich, A. glaucescens 
G. Don has no standing. 
The specific epithet calophylla has been ap- 
propriated by Miquel for his Alstonia calophylla, 
a species placed in synonymy of A. angustiloha 
in the present paper. 
Now the question arises whether Winchia 
glaucescens, which is the next name in order of 
priority, is legitimate. Schumann observed that 
since the name Alyxia glaucescens G. Don was 
cited by De Candolle in synonymy of Winchia 
calophylla A. DC., the earlier specific epithet 
should be used; he apparently considered his 
name a new combination in which use was made 
of Don’s epithet, and he accredited G. Don 
parenthetically. Actually De Candolle had noted 
that A. glaucescens G. Don differed from his 
plant in some important characters but referred 
to it primarily because of Don’s citation of 
Wall. 1607 . However, Schumann’s description of 
the Martaban plant and his placing of Winchia 
calophylla in synonymy leave no doubt regard- 
ing what species he had in mind. Schumann 
erred merely in considering Don’s specific epi- 
thet as being necessary for a new combination, 
for it was illegitimate and therefore not to be 
taken into consideration for the purpose of 
priority. The question is whether Schumann 
could legitimately make use of glaucescens. 
The answer is yes; for the International Rules 
(Ed. 3, 1935. Article 69) concede as proper 
for the formation of a new name the employ- 
ment of an epithet that has been illegitimately 
