124 
primitive type of structure,* it suggests that Negundoin its origin 
has a very close relationship to the genus Acer—probably a 
highly specialized form in this genus. In this connection the 
simpler, more Acer-like foliage of the seedling of A. Negundo is 
to be recalled. This phenomenon and the occurrence of the 
hermaphrodite flowers above recorded lends support to the 
classification which places Negundo in the genus Acer. 
In conclusion I wish to express my heartiest thanks to Mr. R. 
B. Thomson for his interest and assistance in the preparation of 
this paper. 
UNIVERSITY OF TORONTO, 
February, 1912 
я REFERENCES 
Britton, N. L., North American Trees, New York, 1908 
Sargent, C. S., Manual of the Trees of North America, Mono: and New York, 1905. 
THE FLORA OF NORTHAMPTON COUNTY, 
PENNSYLVANIA 
By WILBUR L. KING 
(Continued from May Torreya) 
CYPERACEAE 
CYPERUS FLAVESCENS L. In marshy grounds, Easton. (Porter.) 
CYPERUS RIVULARIS Kunth. m Island Park. (Porter); in wet soil along 
canal at Bethlehem. Sept. 1, 
CYPERUS INFLEXUS Muhl. In er san dy soil. (Porter.) 
CYPERUS DENTATUS Torr Along canal in wet sandy sc at Bethlehem, Sept., 
1898. Specimens with flower scales modified into tufts of small leaves have 
been foun 
CYPERUS ROTUNDU SL Өр e ешм! in Bethlehem Steel Co.’s yard. Re- 
port re ais. Bulletin Jan. s 1892. 
CYPERUS ге оф ; wet soil od in meadows along Monocacy creek 
can Aug 
pho stricosus L. In moist pe A soil and in meadows at Bethlehem. 
pt. 9, 1896. 
CYPERUS FILICULMIS Vahl. Along Lehigh river. (J. A. Ruth.) 
gives ARUNDINACEUM (L.) Britton. In moist soil at Island Park. 
25, 1902. 
"к OVATA (Roth. К. & S. Оп muddy shores of Lehigh river at 
ELEOCHARIS GLAUCESCENS ran ) Schult. In moist soil along Lehigh canal 
at  Bechdehem June 20, 
ELEOCHARIS ACICULARIS (L) R. & S. On muddy banks of Lehigh river, 
Bethlehem. Aug. 22, 1899. 
* In certain acacias, pines, junipers, etc., wounding causes reversion to the seedling 
type of foliage which is considered ancestral. 
БАКА; Б P IE EN NIRS A IFE OIN R ЫС MERC CUI Reh EEY 
