ACERACEAE. — ACER 89 



These specimens agree well with typical A. palmatum; the leaves are generally 

 seven-lobed, about 6-8 cm. 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 imfolding are thinly covered with long hairs, but soon become glabrous ex- 

 cept the bearded axils of the veins; the inflorescence is also at first sUghtly hairy. 



Acer ceriferum Rehder, n. sp. 



Arbor 10 m. alta trunco circuitu 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- 

 bicularia, 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 cm. 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 incurvac cum loculis 

 2 cm. 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 

 bearded axils of the under side, the stouter petioles, the decurrent wing of the 

 fruit and the absence of the waxy covering of the branches. 



