1896 | BOTANICAL PAPERS AT BUFFALO 235 
Arizona; A. florida occurs in Oregon and Washington; and 4. 
Pringlet in Mexico. 
Arex. P. ANDERSON: On the formation and distribution of 
abnormal resin ducts in conifers ——By some extended work on the 
occurrence of normal and abnormal resin ducts in conifers the 
author found: (1) annual rings of Pinus silvestris and Picea 
excelsa containing frost rings have in cross sections fewer vertical 
resin ducts per square millimeter than the normal rings; 
(2) regulatory tissue in hyponastic branches of Pinus silvestris 
has in cross sections fewer resin ducts per square millimeter 
than the opposite side of the branch; (3) in Adies pectinata 
affected with £cidium elatinum, (a) the resin ducts in the 
diseased bud-scales are more irregular in their form and contain 
fewer epithelium cells than the normal, (4) the fungus mycelium 
is never found in the resin duct canals, nor in the epithelium 
layer of cells surrounding the canals, (c) abnormal resin ducts 
are always found in the wood of the thickened portion of the 
diseased branch ; (4) in Pinus Strobus diseased at the roots with 
Agaricus melleus Vahl, an increase in the number of resin ducts of 
the wood takes place in the whole plant above the diseased part ; 
(5) in the wood of branches of Abies pectinata diseased with 
Phoma abietina Hartig abnormal resin ducts are found only above 
the constricted portion of the branch; (6) the same phenomenon 
ie mentioned occurs when young seedlings of Adzes pectinata 
© diseased with Pestalozzia Hartigii Tub. 
a Pag A. SmitH : The development of the cystocarp of Griffith- 
B ornetiana.— Published in full in the July number of the 
OTANICAL GazeTre, 
ee UNDERWoop : Notes on the allies of the sessile Ti rillium.— 
this fain i Trillium have been confused apparently under 
as specie nun Linneus included under this name at least 
b 8 which had been well figured before his day, the one 
Y Plukenet and the other by Mark Catesby. One of these 
