THYMELAEACEAE. — WIKSTROEMIA 537 



18. Wikstroemia alternifolia Batalin in Act. Hort. Petrop. XIII. 99 (1803).— 

 Hemsley in Jour. Linn. Soc. XXVI. 397 (1894). — Pritzel in Bot. Jahrb. XXIX. 

 480 (1900). 



Kansu : " vallis fl. Hei-ho supra pagum Hun-nei-ku" July 24, 1885, G. N.Potanin 

 (ex Batalin). 



19. Wikstroemia Pampaninii Rehder, n. sp. 



Wikstroemia alternifolia Pampanini in Nuov. Giorn. Bot. Hal. n. ser. XVII. 

 675 (non Batalin) (1910). 



Frutex 0.5 v. ultra altus, ramis gracilibus erectis; ramuli teretes, homotini, 

 praesertim apicem versus, dense pilis albidis subaccumbentibus obtecti, annotini 

 glabrescentes ut vetustiores f usco-purpurei ; gemmae subglobosae, conspicue 

 albido-tomentosae. Folia omnia alterna, membranacea, elliptioa v. obovato- 

 elli))tica v. anguste elliptica, utrinque acuta, margine, in sicco saltern, revoluta, 

 1-2 cm. longa et 0.4-0.8 lata, utrinque pilis longis accumbentibus ad costam subtus 

 densius vestita, fere concoloria, costa media subtus elevata, nervis paucis incon- 

 spicuis; petioli circiter 1 mm. longi, dense pubescentes. Flores sessiles in si)icis 

 dense pilosis terminalibus pluri- v. multifloris et axillaribus saepius paucifioris in 

 apice ramulorum paniculas angustas foliatas foliis a]ncem versus decrescentibus 

 formantibus; perianthii tubus dense adpresse pilosus, 3.5-4 mm. longus, lobis ovali- 

 bus 4 extus pilosis 1.5 mm. longis; antherae 8, oblongae, 0.8 mm. longae, filamentis 

 vix 0.2 mm. longis, superiores paullo exsertae, inferiores su])ra medium tubi 

 affixae; pistillum 2.5 mm. longum, ovario pilis adpressis dense obtecta, stylo brevis- 

 simo, stigmate capitato pilis longis id subaequantibus fere occultato; squamae 

 disci 2, circiter quartam partem ovarii aequantes, una linearis, altera latior, 

 inaequaliter plus minusve 2-3-dentata. Fructus immaturus tantum visus, pubes- 

 cens. 



Northern Hupeh: " monte Triora," alt. 1950 m., July 3, 1907, C. Silvestri 

 (No. 1540, type); "monte Niang-niang," alt. 1950 m., July 1907, C. Silvestri 

 (No. 1541). 



This species seems most closely related to W. alternifolia BataUn, which differs 

 according to the description in its gray branches, in the narrower leaves, which 

 are about twice as long, in the 12-14 mm. long flowers and in the solitary disk- 

 scale about half as long as the ovary. The hairs at the apex of the ovary are in 

 W. Pampaninii remarkably long and nearly hide the stigma, which is slightly ovoid 

 or obovoid in shape. 



20. Wikstroemia holosericea Dielsin Not. Bot. Gard. Edinhurgh, V. 286 (1912). 

 Yunnan: Descent of the Yangtsze from Chung Tien, alt. 3000 m., September 



1904, G. Forrest (No. 13, ex Diels). 



According to Diels this species has no disk-scales, which makes it doubtful 

 whether it belongs in the genus Wikstroemia. 



21. Wikstroemia dolichantha Diels in Not. Bot. Gard. Edinburgh, V. 286 (1912). 

 Yunnan: Chien-chucn and Hoching valleys, alt. 2100-2700 m., September 



1904, G. Forrest (No. 133 ex Diels); Mengtsze,'griT'Ss hills, alt. 1400 m., A. Henry 

 (No. 10277; slender shrub 0.6-1 m. tall, flowers yellow). 



Henry's specimens differ from the original description in their more copious 

 pubescence, though the different specimens distributed under No. 10277 show 

 great variation in this respect; in one .si)ecimen in the herbarium of the Arnold 

 Arboretum the leaves are densely pubescent on both sides, while in the other they 

 are less pubescent and narrowly elliptic; in the one si)ecimen in the herbarium 

 of the New York Botanic Garden the leaves are nearh' glabrous below, but thinly 

 pubescent above and also narrowly elliptic. 



