1920] REHDER, NEW SPECIES, VARIETIES AND COMBINATIONS 197 



July 18, 1914, C. Schneider (No. 1896, frutex ad 4 m., fl. albis); Tali Range, 

 Lat. 24° 40', alt. 9-10,000 ft., July, August, 1906, G, Forrest (No. 5036, 

 in parte quoad specimina calyce glabro); Mo-tao-tsin, Kou-ty, circa Pe- 

 yen-tsin, April 15, 1917, Simeon Ten (No. 469). 



From typical P. Delavayi L. Henry which is also represented in our 

 herbarivun by cultivated specimens raised from Forrest's No. 2195 and by 

 Schneider's Nos. 1529 and 1806 from Yunnan the new variety differs in 

 the under side of the leaves which is pubescent on the veins only and glau- 

 cescent or nearly glabrous, while the upper siu'face shows the same pubes- 

 cence as in the type, though somewhat less dense. 



A peculiar form is Schneider's No. 3505 collected between Yungning and 

 Yungpch, In this form the leaves resemble the type, but the sepals are 

 thinly strigose-pubescent, while the caljoc-tube shows only a few scattered 

 hairs or is nearly glabrous; the i>ediceLs and rachis are glabrous as in the 

 type. Thus it approaches P.Henryi Koehne, but in that species the young 

 branchlcts, the rachis and the pedicels are more or less pubescent and the 

 cal^ic-tube is usually rather densely strigose, wdiile the sepals are much less 

 pubescent and sometimes nearly glabrous. 



Philadelphus Ilenryi Koehne may possibly be only a variety of P. Dela- 

 vayi, but it is easily distinguished by the pubescence of the branchlcts and 

 inflorescence, by the narrower leaves, the somewhat smaller flowers and 

 by the less highly colored cal^-x. Of this species I have seen the folloM^Ing 

 specimens from Yunnan: Mengtze, A. Henry (No. 10,749 B, type. No. 

 10,749); Yunnan-Fu, June 1, 1916, 0. Schoch (No. 148); La-pa-ho, Tie-so, 

 near Pe-yen-tsin, June 18, 1916, Simeon Ten (No. 195a); Tali Range, G. 

 Forrest (No. 5032, No. 5036, pro parte, quoad sjx^cimen calyce pubescente). 

 Forrest's specimen differs from the type in the less pubescent calj'x, the 

 sepals and the upper part of the calyx-tube }>eing often glabrous or nearly 

 so; these specimens had been determined by DIels (in Not. Bot. Gard. 

 Edinburgh, vii. 291, 292 (PI Forrest.) [1912]) as P. nepalensis Koehne 

 which is a different not very closely related species, easily distinguished by 

 the leaves being quite smooth and glabrous on both sides except a villous 

 pubescence In the axils of the main nerves on the under side, and by the 

 pale green quite glabrous cal^Tc. Ten's No. 195a exliibits in regard to pubes- 

 cence a tendency toward the opposite extreme; the young branchlcts, the 

 inflorescence and the calyx are densely grayish pubescent, and the leaves 

 are thinly strigose pubescent on the whole undersurface; it differs also in 

 the narrower ovate-lanceolate sepals. Schoch's No. 148 is almost inter- 

 mediate between Ten's specimen and typical P. Henryi. 



ped 



dasycal3rx, var. nov. — A typo re- 

 ellisque strigoso-villosis. — Kamuli 

 , 3-5 cm. longa, glaberrima, subtus 



petioli graciles, 3-6 mm, longi, purpurascentes ut nervi 



b 



ni 5-7-flori, satis densi; pedicelli 3-5 mm. longi: flores cir- 

 lam.: senala ovata, acuminulata; stylus aplce circiter auarta 



