90 WILSON EXPEDITION TO CHINA 



Sect. SPICATA Pax. 



Acer Oliverianum Pax in Hooker's Icon. XIX. text to t. 1897 (1889). 



Western Hupeh: Fang Hsien, woods, alt. 1500 m., July 1907 

 (No. 1936).^ 



Acer Giraldii Pax in Y^nglev, Pflanzenreich, Heft 8 (IV. 163), 79 (1902). 



Western Szech'uan: southeast of Sungpan, forests, alt, 2400 m., 

 August 1910 (No. 4506). Shensi: G. Oiraldi (No. 2115, 2136). 



Closely related to A . caesium Wallich from which it differs chiefly in the broader, 

 less acuminate lobes, the minute often obsolete basal lobes, the coarser and more 

 remote serration and the strongly reticulate under side of the leaves. The size of 

 the fruits seems to afford no distinguishing character, for I have before me Hima- 

 layan specimens with fruits about 4 cm. long and Wilson's No. 4506 has fruits 5.5 

 cm. long. Wilson's No. 2707 (in Herb. Kew.) from Hupeh referred by me formerly 

 to A. caesium, probably belongs here. 



Acer sinense Pax in Hooker's Icon. XIX. text to t. 1897 (1889). 

 Western Hupeh: Hsing-shan Hsien, woods, alt. 1500-2100 m. 

 (No. 1885). 



Wilson's No. 1885, consisting only of sterile branches, is possibly a juvenile form 

 of A. sinense; it differs from the typical form in its deeply divided five-lobed leaves 

 with oblong, rather narrow lobes, the middle one 7-8 cm. long and 3 cm. broad. 

 Apparently the same form is figured by Veitch as A. spec, (in Jour. Roy. Hort. Soc. 

 XXIX. 354, fig. 99, 103). I have not been able to find among Wilson's and Henry's 

 flowering and fruiting material a specimen which matches this form in the shape 

 of the leaves. 



Acer Wilsonii Rehder in Sargent, Trees and Shrubs, I. 157, t. 79 

 (1905). 



Western Hupeh: South Wushan, woods, alt. 1200-1800 m., 

 September 1907 (No. 233). 



Acer erianthum Schwerin in Mitt. Deutsch. Dendr. Ges. X. 59 (1901). 



Western Hupeh: Fang Hsien, thickets, alt. 1800-2400 m., July 

 1907 (No. 1931), October 1910 (No. 4428); southeast of Sungpan, alt. 

 2500 m., August 1910 (No. 4508). 



1 There may be added a note on a variety from Fokien. 



Acer Oliverianum, var. serrulatum Rehder, n. comb. 

 Acer Wilsonii, var. serrulatum Dunn in Jour. Linn. Soc. XXXVIII. 358 (1908). 



Fokien: April to June 1905,5. T.Dunn (Herb. Hongkong Bot. Gard. No. 2545). 



Differs from the type in its smaller, three-lobed leaves with short ovate ap- 

 pressed serrulate lobes narrowed into a short obtusish acumen, glabrous on both 

 sides, reticulate beneath, 2.5-4 cm. long and 3.5-5.5 cm. broad; corymb small and 

 few-flowered. To A. Wilsonii Rehder it seems less closely related; that species 

 differs from it widely in its paniculate inflorescence, and in the entire or nearly 

 entire lobes of the thinner leaves. 



