Chiogencs hispidnla ?is\A Cornns canadensis beneath, while I'acci- 

 niuin canadetisc and Sorbus amcricana are prominent shrubs. At 

 1,550 meters trees are only 1-2 feet hij^h, and disappear entirely, 

 bein<4 replaced in exposed places hy Ledum qrotnUuidicuni, Vacci- 

 fiiuin uligiuosuni and l\ cacspilosnni {I'accininni-Lcdjun associa- 

 tion), Euipctruni nigrum [Einpeinnn association), Alnus alnohctula 

 {Alnus association), and in sheltered places are found Spiraea 

 sa/ieifolia, Gottiana linearis, J ^eratruvi viride and Linnaea ajner- 

 icana. 



Ali'ine Plant Formation. — The plants on the bare top 

 (5,300 feet), collected by the writer,* are Coptis trifolia, Viola 

 blanda, Arenaria groen/andica, Oxalis Acetosella, Sibbaldiopsis 

 tridentata, Rubus strigosus, Sorbus aniericana, Spiraea salicifolia, 

 Ribes prostratnm, Cornus canadensis, Linnaea aniericana, Hous- 

 tonia caenilea, Solidago a/pestris, Nabalus Bootii, Vaccinia ni caespi- 

 tosuni, ]''. pcnnsylvanicuni, V. peiinsylvanicuui angustifoliuni, V 

 uliginosuni, Oxycoccus Oxycoccus, C/iiogenes hispidula, Chaniae- 

 dapline calycidata {Cassandra calyculata), Ledum grocnlandicum, 

 Kalmia glauca, RJiododendron lapponicttm, Rhinanthus Crista- 

 Galli, Trientalis anicricaiia, Diapcnsia lapponica, Gentiana linearis, 

 Empetrum nigrum, Bctula glandulosa, Alnus ahiobetula, Salix 

 Uva- Ursi, Abies balsamea, Veratrum viride, Eriophorum vaginatum 

 and Lycopodium Selago. A singular lichen, Thamnolia vermic- 

 nlaris, attracts the attention by its pure white color, and its 

 cylindric, hollow sharp-pointed podetia 2-4 inches long, growing 

 among mosses and on the thin soil of the mountain-top under 

 sterile conditions. It is more plentiful, according to Professor 

 Peck, on Mt. Mclntyre than on Mt. Tahawus (Mt. Marcy). 

 Lonicera coerulea ascends almost to the top of the mountain. It 

 occurs behind the sheltering rocks but a short distance south of 

 the signal station. Carex Bigelovii is the only sedge on the 

 highest part of the mountain. f 



Bog Formation. — Two small marshy areas form a part of the 

 open summit of Mount Tahawus. One is a decided depression 



* The ascent was made by Professor Drude and the writer on August 26, 1904. 

 t I'eck, C. H. Plants of the Summit of Mt. Marcy. Bulletin New York Slate 

 Museums: 657. 1899. 



