ACERACEAE. — ACER 89 
These specimens agree well with typical A. palmatum; the leaves are generally 
seven-lobed, about 6-8 em. in diameter with oblong-ovate, acuminate and doubly 
serrate lobes, quite glabrous beneath except tufts of hairs at the base of the primary 
veins, and slightly reticulate; the wings of the fruit measure with the nutlet 2-2.2 
cm. The Hupeh specimens referred by me previously (in Sargent, Trees and Shrubs, 
I. 179) to this species belong to the following species. 
Acer robustum Pax in Engler, Pflanzenreich, Heft 8 (IV. 163), 
79 (1902). 
Western Hupeh: Hsing-shan Hsien, woods, alt. 1800 m., May, 
June and October 1907 (Nos. 339, 1890, 1932); Fang Hsien, side of 
streams, alt. 1500-1800 m., May 21, 27 and July 1907 (Nos. 1899, 
1900, 1913, 1920); Chang-lo Hsien, woods, alt. 1200-1500 m., Sep- 
tember 1907 (No. 2050); without locality (Veitch. Exped. Nos. 538, 
540). 
Acer robustum differs from A. palmatum chiefly in its larger fruits and the larger 
and broader sepals and petals; the sepals and young fruits are purple. The leaves 
when unfolding are thinly covered with long hairs, but soon become glabrous ex- 
cept the bearded axils of the veins; the inflorescence is also at first slightly hairy. 
Acer ceriferum Rehder, n. sp. 
Arbor 10 m. alta trunco cireuitu metrali; ramuli hornotini tomento 
villoso cinereo partim usque secundum annum persistenti vestiti, 
vetustiores olivacei v. brunnei, laeves, cereo albido-cinereo obtecti. 
Folia membranacea, quinque- v. septem-lobata, circuitu fere semior- 
bieularia, latiora quam longa, basi truncata v. subcordata, 5-8 cm. 
lata et 4.5-6 cm. longa, lobis ovato-oblongis, acuminatis, simpliciter 
et argute serrulatis, sinubus acutis mediam laminam attingentibus, 
Supra laete viridia, subtus pallidiora et reticulata, utrinque ad venas 
primarias pubescentia subtus densius, in axillis venarum non barbata; 
petioli 2.5—4 em. longi, floccoso-villosi. Flores desiderantur. Fructus 
(immaturi sed evidenter ad iustam magnitudinem perventi) 3-6 in 
corymbo parvo; pedunculus gracilis, 4 cm. longus, laxe villosus; sepala 
diu persistentia, oblonga, intus villosa; loculi horizontaliter patentes, 
6 mm. longi et 4 mm. lati, laxe villosi, alae leviter incurvae cum loculis 
2 em. longae, supra medium 8 mm. latae, in loculum attenuatae, non 
decurrentes. 
Western Hupeh: Fang Hsien, ravines (only one tree seen), alt. 
1500 m., June and July 1907 (No. 1934). 
On account of its pubescence this species seems most nearly related to A. Sieboldi- 
anum Miquel, which is easily distinguished by its seven- to eleven-lobed leaves, the 
ed axils of the under side, the stouter petioles, the decurrent wing of the 
fruit and the absence of the waxy covering of the branches. 
