1908] Rehder,— New England Species of Psedera 25 
relieves us of two other vexing nomenclatorial questions, the fixing 
of the type of Ampelopsis Michaux and the question whether Quinaria 
of Rafinesque should supersede Parthenocissus of Planchon. It will 
be remembered that Ampelopsis was published by Michaux (Fl. 
Вог. Am. 1:159. 1803) with three species without indication as to . 
which one he considered the type of the genus. Torrey & Gray 
(Fl. N. Am. 1:245. 1838) took Ampelopsis quinquefolia as the type 
and referred the other species to Vitis, but 8 years before Rafinesque 
(Am. Man. Grape Vin. 6. 1830) had made Ampelopsis quinquefolia 
the type of his new genus Quinaria. Objections in regard to the 
validity of this name have been raised in account of an older homonym, 
Loureiro's Quinaria of 1790, which, however, is identical with Cookia 
Sonnerat of 1782, both being based on the same species, and therefore 
the older homonym being non-valid would not prohibit the use of 
Quinaria of Rafinesque. Quinaria and Parthenocissus wil now 
become simple synonyms of Psedera, while Ampelopsis will also dis- 
appear as a genus, if Ampelopsis cordata and its allies are not considered 
as constituting a distinct genus; as it is hardlv possible to separate 
them from Cissus by any constant and reliable characters, it seems 
best not to retain Ampelopsis as a genus. 
Two species of Psedera occur in New England:! 
PSEDERA QUINQUEFOLIA Greene, Leafl. Bot. Observ. 1:220. 1906. 
— Hedera quinquefolia Linnaeus, Sp. РІ. 202. 1753.— V itis quinquefolia 
Lamarck, Ill. 2:135. 1793.— Ampelopsis quinquefolia Michaux, Fl. 
Bor. Am. 1:160. 1803.— Cissus hederacea Persoon, Syn. 1: 143. 1805.— 
Quinaria hederacea Rafinesque, Am. Man. Grape Vin. 6. 1830.— 
Parthenocissus quinquefolia Planchon, De Candolle Monogr. Phan. 
5:448. 1887. High climbing shrub fastening itself by the disks of 
its tendrils to the support. Leaf-buds in spring and the young branch- 
lets at the tips light red. Tendrils with 5 to 8 disk-bearing ramifica- 
tions. Leaves long-petioled, 5-foliolate or occasionally 3-foliolate; 
leaflets ovate to ovate-oblong, 5 to 10 cm. long, acuminate, usually 
narrowed at the base, coarsely and usually crenately serrate, dull 
green above, glaucescent beneath, usually of thickish texture. Flowers 
on slender pedicels in 3- to 6-flowered umbels terminating the ramifi- 
cations of the unequally dichotomous or thyrsoidal corymbs usually 
crowded at the end of the branchlets and forming leafy panicles. 
1 For fuller citation of the synonymy see Rehder, Sargent's Trees & Shrubs 1: 183- 
190, (1905) and Mitteil, Deutsch. Dendr. Ges. 14: 129-136 (1905). 
