14 Rhodora [JANUARY 
veins, is the common eastern plant, extending south and west to 
Georgia, Michigan, and Manitoba. In this plant the petioles are 
generally very short, 3-7 mm. or even less, although sometimes some- 
what longer. In the other plant, which must be considered the typical 
form of V. affine as here taken, the leaves are pilose beneath only 
along the veins and in their axils, not between them, and the petioles 
are commonly longer (12 mm. or less). This- plant is of more restricted 
and western range, being represented in the two herbaria consulted 
only from Ontario, Illinois, Iowa, Minnesota, Virginia, and Missouri. 
Mr. Rehder tells me that both these varieties have retained their 
distinctive characters during a number of years’ cultivation at the 
Arnold Arboretum. 
It seems best, therefore, to adopt for the plant which has been pass- 
ing as Viburnum pubescens (Ait.) Pursh the name V. affine Bush, and 
that it may be eligible for use under the International Rules, to provide 
it with a Latin diagnosis, as follows. 
VIBURNUM AFFINE Bush.— V. affine Bush! ex Rehder in Sarg. 
Trees & Shrubs i. 135 (1903), nomen; ex Schneider, Ill. Handb. Laub- 
holzk. ii. 649. f. 415, l-m (1911), without Lat. diag. V. pubescens 
var. affine (Bush) Rehder, Mitt. Deutsch. Dendr. Gesell. 1913. 263 
(1913), without Lat. diag. V. pubescens auth., not Pursh.— Frutex. 
Folia ovata acuta dentata (dentibus 4-9-jugis) ‘supra sparse pilosa 
vel glabrata subtus plus minusve dense pilosa (pilis simplicibus) 
venosa (venis 5~7-jugis) 3.5-7 cm. longa 2.34.2 em. lata, in petiolis 
2-12 mm. longis ad basin conspicue 2-stipulatis. Cymi 7-radiati, 
floribus ca. 6 mm. latis. Drupae purpureae, putamine compresso in 
faciebus leviter 2-sulcato.— Represented in the Gray Herbarium from 
Vt. south to Ga. and west to Mo. and Manitoba. 
The species may be separated into the two following varieties. 
Var. affine (Bush) comb. nov. (typical form).— Folia subtus in 
venis et in axillis venarum plus minusve pilosa ceterum glabra; petioli 
saepe usque ad 12 mm. longi.— V. affine Bush. V. pubescens var. 
affine (Bush) Rehder.— Ont., Ill., Minn., Ia., Va., and Mo. 
Var. hypomalacum, var. nov. Folia subtus dense pilosa; petioli 
saepius 3-7 mm. longi— V. pubescens of most auth., not Pursh.— 
Type from Vermont: Ferrisburg, fl. 17 June 1881, fr. 7 Aug. 1880, 
C. E. Faxon (TYPE in Gray Herb.).— Vt. and Ont. to Ga., Mich., and 
Manitoba. ; 
Another Viburnum, the name of which has become somewhat con- 
fused, is the American form of V. Opulus L., which has commonly 
been called V. Opulus L. var. americanum (Mill.) Ait., a name said to 
rest on V. americanum Mill. Gardn. Dict. ed. 8. no. 8 (1768). The 
type of Viburnum americanum Miller in the British Museum, however, 
