1903] Pease, — Erodium malacoides at Lawrence, Mass. 39 
in length from a quarter inch to an inch and a half, and stand out 
from the surface of the lamina (l, Fig. 2) about one tenth of an inch- 
The longer ones are parallel to the principal veins, but others are 
disposed irregularly. As seen from above the position of the origi- 
nal wounds is shown by deep furrows. 
The minute structure of the accessory lamellae is like that of the 
blade proper, except that palisade tissue is absent: There are 
stomates on the outer surfaces, and veinlets spfinging from the veins 
at the bases of the outgrowths. 
Perrot has recently communicated to the Société botanique de 
France on account of seemingly the same phenomenon observed by 
him in leaves of Aristolochia Sipho from Melun, near Paris. In 
Perrot's case several leaves, all from the same shoot, however, were 
anomalous. In interpreting the "biological significance" of the 
matter Perrot says 
"It would appear that the plant, by these supernumerary pro- 
ductions, has sought to augment the surface of its blade in order to 
increase its transpiration — but under what physiological influence ? ? 
Miss Loring's observations would seem to make the nature of the 
process clear. "The lamellae have originated in the healing of wounds, 
simply, and are curious examples of regeneration of the blade. 
AMEs BOTANICAL LABORATORY, North Easton, Massachusetts. 
ERODIUM MALACOIDES AT LAWRENCE, MassacHuskTTS.— On July 
9, 1902, while collecting plants about the mills on the north side of 
the Merrimac River at Lawrence, Massachusetts, I found a strange 
Erodium in a waste place, behind a foundry. Mr. M. L. Fernald 
has kindly identified the plant for me as Æ. malacoides, Willd. ‘This 
species is a native of the Mediterranean countries, but has been col- 
lected in or about New York City by Judge Addison Brown. Its 
occurrence at Lawrence seems worthy of note.— ARTHUR STANLEY 
PEASE, Andover, Massachusetts. 
LYCOPODIUM CLAVATUM AND ITS VaARIETY.— Notes in regard to 
this species have been published in Ruopora by Dr. Robinson, 
September, 190r, Mr. Leavitt, March, 1902 and Mr. Harper, May, 
! Bull. Soc. bot. de Fr. xlix. 163-166 (1902). 
