408 MR. H. H. HAINES ON 
“ There is a Darjeeling species found in woods about Kalimpoong 
and Dumsong; apparently included in P. ciliata, Wall. in Hook. f. 
Fl. Brit. Ind. It is probably a distinct species, aud is easily 
recognized by the leaves being square instead of cordate at the 
insertion of the petiole.” Mr. Gamble is quite right as to this 
being a distinct species, but my photographs and specimens 
show that it cannot be recognized by the character of the leaves 
given. 
3. Poputus aLAUCA, Haines, sp. nova; folis ovatis aeutis, 
basi leviter cordatis aut truncatis aut in petiolum breviter 
decurrentibus; fructu subgloboso, sspe 2-carpellari, piloso ; 
spice rhachide pilosa. Cf. fig. nostram, p. 407. 
ToxGLo; alt. 7500-10,000 feet, Haines, n. 8206. 
This species is closely allied to P. lanuginosa, Oliver; Hook. 
Ic. PI. (1900) t. 1943, cf. Hemsl. in Journ. Linn. Soc., Bot. xxvi. 
(1899) p. 536. This Yunnan species has ovoid-oblong white- 
woolly fruits and leaves deeply cordate at base. 
[Not further referred to in this paper is P. rotundifolia, 
Griff. Private Journ. (1847) p. 290; Notule, iv. p. 382; Ie. 
Pl. Asiat. Rar. t. 546 (= Liquidambar sp., Griff. Itin. Notes 
(1848) p. 172).—This is the older name for JP. microcarpa, 
Hook. f. Fl. Brit. Ind. v. p. 639, which gives, as the one locality 
for P. microcarpa, “about Panga and towards Chupeha, alt. 
7600 feet, Griff,” which is the locality where Griffith. obtained 
his P. rotundifolia. | 
The principal point of interest concerning P. Gamble: to which 
I now wish to draw attention is the dimorphism of the leaves 
and shoots, which is possibly due to fungus agency. The 
normal leaves are quite glabrous; they attain only 6 by 4 iu., 
have a straight or obtuse base and a slender petiole. In October 
1904, I collected leaves of a Poplar which were very pubescent or 
even villous beneath. The smallest were about 6 in. long, and 
many attained 13 by 10 in.; the base was cordate, the petiole 
thick and comparatively short. There were, moreover, two large 
glands developed at the base of the leaf just above the petiole. 
No two species of the genus could, in fact, appear more distinct 
than this tree did and the normal form first described. There 
were, however, trees not far off with some branches bearing one 
