90 WILSON EXPEDITION TO CHINA 



A typo recedit foliis ovatis v. ovato-oblongis, 6-8 cm. longis, mani- 

 feste caudatis, duplicato-serratis, nee v. vix lobulatis, basi rotundatis 

 \. interdum angustatis, plerumque trinerviis, supra fere glabris, sub- 

 tus villosulis V. ad venas densius, facie sparsius adpresse pubescentibus. 



Western Szech'uan: Wa-shan, woods, alt. 2100 m., June 1908 

 (No. 1895); southeast of Tachien-lu, woods, alt. 1800-2400 m., June 

 1908 (No. 1898); Chiu-ting-shan, thickets, alt. 2000 m.. May 23, 1908 

 (No. 1894); no locahty, alt. 2400-2700 m.. May 1904 (Veitch Exped. 

 No. 3348); Nanto (Veitch Exped. No. 1233); no locality, A. Henry 

 (No. 8799). 



This variety is distributed from Wen-chuan southward, but does not extend 

 into western Hupeh. The typical form differs from this variety chiefly in the smal- 

 ler triangular-ovate leaves, more or less lobed and sparingly pubescent on both 

 sides or, while young, rarely glabrescent. The variety approaches in its more ex- 

 treme forms A. stachyophyllum Hiem, which differs chiefly in its leaves being 

 densely villous beneath, in its larger fruits and in the often branched racemes. 



Acer tetramerum, var. elobulatum, f. longeracemosum Rehder, n. 

 forma. 



Recedit a varietate praecedente racemis elongatis ad 18 cm. longis, 

 pedicellis ad 4 cm. longis, alis cum loculo 3.5-4 cm. longis, foliis pler- 

 umque majoribus, 7-11 cm. longis, petiolis ad 8 cm. longis. 



Western Szech'uan: Nin-tou-shan,westof Kuan Hsien, thickets, 

 alt. 1800-2400 m., June 20, 1908 (No. 1896, type); Mupin, woods, alt. 

 2400 m., September 1910 (No. 4104, in part). 



Differs strikingly in its very long and slender racemes from the typical var. 

 elobulatum. From forma latialatum, which has racemes of about the same length, it 

 differs in the pubescent leaves and in the narrower wings generally about 1 cm. 

 broad. 



Acer tetramerum, var. tiliifolium Rehder, n. var. 



A typo recedit praecipue foliis late ovatis, basi cordatis, 5-nerviis, 

 grossius inaequaliter v. duplicater serratis, nee incisis, nee lobulatis. 

 Folia 4.5-7.5 longa et 3-5.5 lata, supra glabra, subtus molliter pubes- 

 centia, petiolis 2-4 cm. longis, glabris. Fructus alis angulo obtuso 

 divergentibus, rectis, cum loculo 3.5-4 cm. longis et 8-10 mm. latis. 



Western Szech'uan: Wa-ssu country, Wen-chuan Hsien, woods, 

 alt. 2700 m., October 1910 (No. 4107). 



Closely related to the var. elobulatum, but easily distinguished by the broadly 

 ovate leaves cordate and 5-nerved at the base; they resemble those of a small- 

 leaved Linden. 



