24 
Protophyllum stikinensis n.sp. 
Plate X, figure 2 
Description. Leaf blade, entire, with smooth or undulate margin, 
apex unknown; lower border, narrowly rounded and subpeltate. Median 
vein, straight; primary laterals, inclined about 25 degrees to midrib, and 
nearly as prominent, slightly curved upwards, somewhat fiexuous in their 
course distally, eraspedodromous, terminating at top margin; basal laterals 
opposite, and inserted about 5 mm. above the base of the leaf, provided 
each with about 8 secondaries on the lower side. The basal one of the 
latter curves slightly downwards in its course and is camptodromous; 
the remaining secondaries of this series, of which the upper at least are 
eraspedodromous, curve slightly upwards and are somewhat fiexuous distally. 
The second pair of laterals are subopposite and distant 2-6 cm. above the 
basal pair to which they are subparallel. A third pair of laterals is 
partly exposed, distant 2*5 cm. from the second pair, and opposite one 
another. Below the insertion of the basal laterals there are 3 pairs of 
camptodromous veinlets given off directly from the midrib, of winch the 
lowest pair is approximately horizontal. Tertiary veins, transverse, regular, 
generally simple, rather distant, slightly arched upwards. 
Remarks . This species is quite distinct from other American species 
of Protophyllum . 
Types. Holotype, 166; National Museum of Canada, Ottawa. 
Platanus uniformis n.sp. 
Plate XI 
Description. Leaf blade, entire, somewhat longer than broad, evenly 
but not deeply dentate; lower margin nearly a right angle; top margin 
broadly rounded and with abruptly acute apex; petiole at least 2*5 cm. 
in length. Median vein straight; primary laterals inclined at 30 degrees 
to 35 degrees to midrib and only a little less prominent, nearly straight 
or somewhat curved upwards, eraspedodromous, terminating in marginal 
teeth. Basal laterals opposite and inserted several mm. above the base 
of the leaf, each furnished with 6 to 8 eraspedodromous secondaries on 
lower side, the latter simple or with one or two branches that end in 
marginal teeth. Remaining laterals consist of 4 or 5 pairs, subopposite 
or alternate, each with 0 to 3 secondary nerves on lower side ending in 
teeth. Tertiary veins transverse, remarkably regular, generally simple, 
arched upwards. 
Remarks. At first sight this leaf was confused with Protophyllum 
stikinensis on account of the similarity in the venation, but the lateral 
veins in Platanus uniformis are not so upright and are not so distantly 
spaced. The tertiary veins too form a closer pattern. Moreover, the 
margin of Protophyllum stikinensis is smooth and the basal end subpeltate. 
P. uniformis resembles somewhat in its venation Platanus marginata 
(Lesquereux) Heer as well as certain variants of P. guillelimae Heer. 
Types. Cotypes, 185, 185a; National Museum of Canada, Ottawa. 
