143 



Magnoliaceae, with this difference, that the presence of lignin in 

 the cells of the latter would tend to prevent the collapse and 

 rupture of the cells to such a great extent. 



The Chenopodiales being distinguished by an anomalous 

 structure of stem and roots, as are also some of the Ranales, it 

 is possible that a further study of the pith cells of these two 

 orders together with those of the Polygonales will furnish 

 additional ground for the position given these orders with refer- 

 ence to each other by the newer classification of Engler and 

 Prantl. 



Philadelphia College of Pharmacy. 



SHORTER NOTES 



A new Station for Isotria affinis. — Forty years ago, Mr. 

 Austin discovered a new species of orchid at Closter, N. J. It 

 was described in the fifth edition of Gray's Manual under the 

 name Pogonia affinis Austin. It should now be known as Isotria 

 affinis (Austin) Rydb., being a close relative of Pogonia verti- 

 cillata (Willd.) Nutt., the type of the Rafinesquian genus Isotria. 

 Specimens from Mr. Austin's original collection are the only 

 ones that are found in the herbaria of the New York Botanical 

 Garden and Columbia University. There are, however, records 

 of two other stations, besides that at Closter, viz., one in Con- 

 necticut and one in southern New York. This summer, this ex- 

 ceedingly rare plant has turned up in an unexpected locality — 

 at Burlington, Vermont. Mrs. Henry Holt, the rediscoverer, 

 first wrote to Dr. Britton about her discovery and afterwards 

 sent three fine photographs of the plant. On the back of one of 

 these is found the following note : " Found in bloom on the first 

 of June and did not fade till the ninth. Found in rich leaf mould 

 with sand, at foot of old hemlock stump, in damp ground at foot 

 of hill on our place. Ground had been cleared of quick growth 

 of aspen, yellow birch, etc." 



P. A. Rydberg. 



New York Botanical Garden. 



