84 WILSON EXPEDITION TO CHINA 
2800 m., July 3, 1908 (No. 1935); southeast of Sungpan, woods, alt. 
2400-2700 m., August 1910 (No. 4507). 
Acer fulvescens Rehder, n. sp. 
Arbor usque ad 20 m. alta trunco ad 65 cm. diam.; cortex trunci 
modice laevis, longitudinaliter leviter tantum fissus, cinereus v. flavido- 
cinereus, lenticellis brunneis saepe in series horizontales confluentes 
dispositis instructus. Ramuli juniores glabri, annotini pallide brunnei 
v. griseo-brunnei v. grisei, lenticellis paucis instructi. Gemmae brun- 
neae, perulis 4-6 exterioribus. Folia membranacea, graciliter petio- 
lata, circuitu suborbieularia, basi rotundata v. subcordata, plerum- 
que trilobata, interdum lobis duobus basalibus minutis additis, sinu- 
bus latissimis apertis, lobis brevibus late triangulari-ovatis, subito 
longe acuminatis, 5-9 cm. longa et 5-10 cm. lata, supra glabra 
et laete viridia, subtus pallidiora, minute reticulata, tomento villoso 
initio flavescente, demum fulvescente laxe obtecta; petioli glabri v. 
tantum apieem versus pubescentes, rarius toti puberuli, 2.5-6 cm. 
longi. Corymbus pedicello glabro, 2-3 cm. longo insidens, laxus, 
multiflorus, pedicellis gracilibus glabris v. apicem versus puberulis v. 
interdum corymbus totus puberulus; flores desiderantur. Samara 
alis horizontalibus loculo compresso 8 mm. longo incluso 3 em. longis, 
supra medium latissimis et circa 1 em. latis, juniora purpurascentia, 
demum pallide flavido-brunnea. 
Western Szech'uan: Pan-lan-shan, west of Kuan Hsien, woods, 
alt. 2100-2700 m., September 1908 (No. 1004, type); Wa-shan, woods, 
alt. 1800-2300 m., October 1908 (No. 1162); Mupin, woods, alt. 1500- 
2000 m., July 1908 (No. 1907). 
Acer fulvescens seems most nearly related to Acer pictum Thunberg, which has 
the branches covered with the same kind of bark, but differs in the glabrous gen- 
erally five-lobed leaves and the shorter wings of the fruits. Acer longipes, which is ' 
very similar, is easily distinguished by the smooth greenish or purplish bark of the 
younger branches without lenticels, the perfectly glabrous corymbs and petioles 
and by the larger leaves, their pubescence being not yellowish or fulvous. ‘Nos. 1162 
and 1907 differ from the type in their puberulous inflorescence. No. 1907 has even 
the whole petioles and the young branchlets below the nodes puberulous. 
Acer cappadocicum Gleditsch, in Schrift. Gesell. Naturf. Freunde Ber- 
lin, VI. 116, t. 2 (1785). 
gio menm ee var. B Linnaeus, Sp. 1056 (in part as to syn. Tournefort) 
Acer laetum C. A. Meyer, Verz. Kauk. Pflanz. 206 (1831). — Pax in Engler, 
Pflanzenreich, Heft 8 (IV. 163), 48 (1902). — Rehder in Sargent, Trees and 
Shrubs, I. 177 (1905). 
