136 Rhodora [JULY 
verbatim by Walter, with the addition of a description of the leaves. 
Although adopted by Kuntze as Thyrsanthema semiflosculare (Walt.) 
Ktze. (Rev. Gen. i. 369 (1891)), and by Robinson as Chaptalia semi- 
floscularis (Walt.) Rob. (Proc. Am. Acad. xlv. 412 (1910)), Walter's 
name — a mere misidentification of Linnaeus’ — should obviously 
not be adopted to the overthrow of the properly published Chaptalia 
tomentosa Vent. The fact that Linnaeus' species is now treated as a 
Gerbera can have no influence on the invalidity of Walter's use of the 
name. There is a good specimen in the Walter Herbarium. 
90. ARETHUSA RACEMOSA Walt. p. 222 = PowTHIEVA racemosa 
(Walt.) Blake (P. glandulosa (Sims) R. Br. in Ait. Hort. Kew. ed. 2. 
v. 200 (1813); Neottia glandulosa Sims, Bot. Mag. t. 842 (1805)). 
There is an excellent specimen in the Walter Herbarium. 
91. Arethusa spicata Walt. p. 222 — HEXALECTRIS SPICATA (Walt.) 
Barnhart, Torreya, iv. 121 (1904). Walter's name is very properly 
taken up by Barnhart in place of the later H. aphylla (Nutt.) Raf. 
There is no specimen, but Walter's description is qui e distinctive of 
this species rather than of Aplectrum hyemale (Muhl.) Torr., to which 
his name has been referred by some. 
29. SALIX ALPINA Walt. p. 243 (S. tristis Ait. Hort. Kew. iii. 393 
(1789)). This unfortunate change is required by the “ International 
Rules," although not by the “American Rules." ‘The only previous 
S. alpina is of Scopoli, Fl. Carn. ed. 2. 255. t. 61 (1772), described by 
Scopoli as doubtfully distinct from S. lanata L. and S. fusca L., and 
not kept up by any modern author. Andersson (in A. DC. Prod. xvi. 
pt. 2. 248, 289 (1868)) refers S. alpina Scop. in part to 5. M yrsinites 
L., in part to 5. M yrsinites L. 8 J acquiniana (Willd.) Anders., and in 
part to S. arbuscula L. a erecta. Anders. f. 3. angustifolia Anders. 
Walter's homonym is consequently available and must be adopted, 
inappropriate as it is, according to the “Vienna Rules." Walter's 
description is clearly of 5. tristis, and there is a specimen of that 
species in his herbarium, labeled “Salix minor ? of Fraser," not in 
Walter's hand, which may be considered the type. Fraser’s name, 
which may well have referred to this species, was never published. 
The changes here proposed may be summarized in systematic order 
as follows, the numbers referring to the preceding list: 
(20) PoNTHIEVA RACEMOSA (Walt.) Blake — P. glandulosa (Sims) 
R. Br. 
(21) HEXALECTRIS SPICATA (Walt.) Barnhart — H. aphylla (Nutt.) 
Raf. 
