121 



plant described by Robbins in Gray's Manual as P. graminctis, 

 L., var. (?) spat/mlcBformis, from Mystic Pond, Mass. He finds 

 the same form in Cambridgeshire, where it fruits freely, which it 

 has not been observed to do in America. 



Opimtia Rafinesquii. J. D. Hooker. (Bot. Mag. Tab. 7041.) 



Panicuvi in the United States — The Genus. Geo. Vasey. (Bull. 



No. 8, Bot. Div. U. S. Dept. Agric. 20-39). 



A proposed systematic arrangement of the sixty-four species 

 credited to the United States, with descriptions. Section vii, 

 {Eupanicimi), containing the species dichotomnm and scoparium, 

 is somewhat amplified by the restoration of the old species niti- 

 diim and laxifloniin. The former is also represented by three 

 varieties ; minor, ensifoliiim and major, and the latter by one, 

 piibesccns. The species dichotomnm is enlarged by the addition 

 of vars. barbiilatimi, viride, divaricattim, villosum and elatiim. We 

 do not believe that the treatment of this section will generally be 

 taken as final. P. Wilcoxianum from Nebraska, P. Chapmani, 

 [P. temiiculmjim, Chapm.), from Florida, P. Reverehoni, P. 



A P. Ha 



The 



paper is hardly to be considered a monograph — we wish it might 

 be ; it is more properl}'' a descriptive list. 



Penicillinm glaitcum — Examination of. — H. L. Osborn. (A men 

 Month. Micros. Journ. x. 1-4). 



Physalospo7'a Bidwellii — Formation des asques dans le. Frechon, 

 (Comptes Rendus, CVI., 1,361). 



Physiological Botany — Principles of, as applied to Horticulture and 

 Forestry, viii. ix. x. xi. Geo. L. Goodale. (Garden and 

 Forest, ii. 92, 104, 105, 116, 117. 128, 129). 



Picea lasiocarpa, (Garden, xxxv. 201, illustrated). 



Populns monilifera. (Garden, xxxv. 189, illustrated). 



An account of a specimen in Danny Park, Sussex, England. 

 It is evidently a very old tree and presents a most extraordinary 

 appearance, many of the branches resting on the ground where, 

 we are told, they have taken root and sent up new vertical shoots. 

 The tree is supposed to be more than one hundred years old. 



