550 WILSON EXPEDITION TO CHINA 



the same species. Also the fact that in western China 5-merous species occur in 

 both genera, while they are unknown in other regions of their wide geographical 

 range, points toward a close connection of these two genera. Neither are there 

 strong anatomical characters to separate the two genera. The onlj' difference Van 

 Tieghem points out is the presence of pitted tracheids in the vascular bundle of the 

 leaves in Wikstroernia, wanting in Daphne, but as Van Tieghem has examined only 

 a limited number of species, it remains still to be proved if this character holds good 

 for all species. Considering, however, that I had to deal here only with a limited 

 number of species which do not represent all the sections and groups of the two 

 genera, I have hesitated to make any change and have maintained the two genera 

 in their usual limitation, leaving the question open for future investigation. 



Here may be added a note on a closely related genus not collected by Wilson. 



ERIOSOLENA Bl. 



Eriosolena involucrata Van Tieghem in Ann. Sci. Nat. eer. 7, XVII. 196 

 (1893). 



Daphne involucrata Wallich in As. Research. XIll. 383, t. 6 (1820). — Meisner 



in Denkschr. Regensb. Bot. Ges. III. 282 (1841). — Hooker f., Fl. Brit. hid. 



V. 193 (1886). 

 Eriosolena Wallichii Meisner in PI. Vase. Gen. II. 243 (1836-43). — Nitsche, 



Beitr. Gait. Daphne, 9 (1907). 

 Scopolia involucrata C. A. Meyer in Bull. Acad. Sci. St. Petersbourg, s6r. 2, I. 



357 (1843); in Ann. Sci. Nat. ser. 2, XX. 49 (1843). 

 Daphne Wallichii Meisner in De Candolle, Prodr. XIV. 540 (1857). 



Yunnan: Szemao, alt. 1500-1600 m., A. Henry (Nos. 11564, 11564^ 11564"). 



In considering Eriosolena a distinct genus I am following Van Tieghem and 

 Nitsche. Van Tieghem (in Ann. Sci. Nat. ser. 7, XVII. 194, 225 [1893]) points 

 out important anatomical differences between Daphne and Eriosolena which are 

 confirmed by Nitsche. Eriosolena is also well distinguished morphologically by 

 the axillary peduncled heads of flowers enclosed by an involucre. It is perhaps 

 more closely related to Edgeworthia which also has a lateral peduncled capitate 

 inflorescence and like it has calcium oxalate in the stem and in the leaves, which 

 is absent from Daphne. Eriosolena involucrata has apparently not been recorded 

 before as a Chinese plant. 



EDGEWORTHIA Meisn. 



Edgeworthia chrysantha Lindley in Jour. Hort. Soc. Lond. I. 148 

 (June 1846); in Bot. Reg. XXXIII. 7, 48 (1848). — Pritzel in Bot. 

 Jahrh. XXIX. 480 (1900). — Meisner in De Candolle, Prodr. XIV. 

 543 (1857). — Hemsley in Jour. Linn. Soc. XXVI. 401 (1894). — Pam- 

 panini in Nuov. Giorn. Ital. Bot. n. ser. XVII. 675 (1910). 



Magnolia tomentosa Thunberg in Trans. Linn. Soc. II. 336 (1794), synon. 

 " Kobus " excludendo, non M. tomentosa Thunberg, Fl. Jap. Nov. Sp. 8 

 (1824). 



Magnolia sericea Thunberg, PI. Jap. Nov. Sp. 8 (nomen nudum) (1824) se- 

 cundum specimen originale in Herb. Thunbergiano.^ 



* See foot-note on p. 400 of Vol. I. 



