63 



hattan sixty years ago. The inference is natural that the con- 

 ditions of soil and climate then and there were similar to those 

 found in Pompton and West Milford now; though this con- 

 clusion must not be stressed, because all of these species have 

 powers of adaptability and endurance. 



A few excursions have been made into the town of Warwick 

 in Orange County, New York, along the hills to the east of 

 Greenwood Lake. Two interesting discoveries have been made. 

 One is that of Lysias Hookeriana, previously reported from 

 Westchester and Delaware Counties, New York, and from 

 Sussex County, New Jersey, but not from the intervening 

 territory. There is a small colony, near the lake level and not 

 far from the highway, in an open wood. The other species, not 

 observed as yet in Passaic County, is Gymnadeniopsis clavellata, 

 which is infrequent in a big swamp high on the hill, in which 

 the great rhododendrom is the chief inhabitant. In the same 

 swamp were noticed a few starved plants of Malaxis unifolia. 



Part of the territory in Passaic County is soon to be flooded, 

 because of the building of a dam, to conserve the water supply 

 for cities. Wood-cutters are doing their part, necessary but re- 

 grettable, in modifying if not destroying plant growth. Many 

 species, even of orchids, are tolerant for years of changed con- 

 ditions, but cannot survive ultimately any radical alterations of 

 their environment. Now is the time to secure proofs, in speci- 

 mens and films, of the presence, as yet, in our Local Area, of 

 many interesting and vanishing species. 



Chelsea Square, New York City. 



CONCERNING SOME SPECIES OF MACHAERANTHERA 



Geo. E. Osterhout 



A perplexing group of plants is comprised in the genus Machae- 

 ranthera. I suppose they have been something of a puzzle to 

 most of those who have studied them. Many of the species 

 seem to be closely related; and whether they are distinct species, 

 I think is a matter of individual opinion. After a study of a 

 number of the species occurring in Colorado I have arranged 

 them in the following order. 



