SAXIFRAGACEAE. 

 PHILADELPHUS L. 



Determined by E. Koehne. 



Philadelphus subcanus Koehne in Mitt. Deutsch. Dendr. Ges. XIII. 

 83 (1904). — Schneider, III. Handb. Lauhholzk. I. 369 (1905). 



Western Szech'uan: Mupin, thickets, alt. 1500-2100 m., June 

 1908 (No. 3039); Wa-shan, thickets, alt. 2100-2400 m., June 1908 

 (No. 3040); southeast of Tachien-lu, thickets, alt. 1800-2300 m., 

 June 1908 (No. 3042); Wa-ssu country, Wen-chuan Hsien, alt. 1800- 

 2300 m., July 1908 (No. 3043). 



I formerly found the style pilose, but now I find it glabrous in some flowers of 

 Wilson's specimens. 



Philadelphus subcanus, var. dubius Koehne, n. var. 



Ramuli floriferi etiam infra racemum laxe pilosi (in typo ibidem 

 glabri). Folia subtus etiam inter nervos dense pilosa, interdum 

 etiam supra pilosa. Stylus saepe glaber. 



Western Szech'uan: Pan-lan-shan, west of Kuan Hsien, alt. 



1500-2300 m., June 1908 (No. 3044); Min valley, Kuan Hsien, alt. 



900 m., June 2, 1908 (No. 3045). 



By its leaves being pilose also on the upper surface this variety seems to ap- 

 proach P. Magdalenae Koehne, but in that species the ovaries and sepals are brown- 

 ish violet outside which I have never observed in P. subcanus. No. 3045 and 

 part of No. 3044 have the leaves on the upper surface and the style glabrous, while 

 one part of No. 3044 has the leaves above and the style at the base pilose. 



Philadelphus Wilsonii Koehne, n. sp. 



Frutex 2 m. v. 3.3-6 m. altus; cortex ramorum biennium persistens 

 albido-griseus; ramuli juveniles sub anthesi [innovationes desideran- 

 tur] fusci glabri; gemmae absconditae. Petioli 8-12 mm. longi cras- 

 siusculi, subtus laxe subaccumbenti-pilosi ; lamina e basi rotundata v. 

 contracta ovato-oblonga v. ovato-elliptica, 10-16 cm. longa, 4.8-7.6 

 cm. lata, infimis supremisque binis exceptis multoties minoribus, 

 leviter longiuscule v. breviter acuminata, denticulata denticulis sat 

 remotis ad mucronem reductis, supra pilis brevissimis remotissimis 



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