180 Rhodora [Aucust 
The areas referred to as the lower wooded slopes are possibly the 
richest in species and afford approximately in the order of ascent, 
Orchis spectabilis, Cypripedium acaule, Habenaria Hookeri, Liparis 
liliifolia, Habenaria bracteata, H. hyperborea, Corallorhisa multifiora, 
Habenaria orbiculata, and Goodyera tesselata. 
While it is hard to draw a definite line between the lower and upper 
slopes the following distinction may generally be made, the lower are 
usually well drained by numerous brooks giving firmer and drier soil, 
while the forest growth is largely of deciduous species ; the upper, on 
the other hand, are extremely wet and cold, and evergreen trees pre- 
ponderate, particularly spruces and balsams. To the upper slopes 
belong Microstylis monophylios with occasional specimens of Corallo- 
rhiza innata, the drier soil under spruce groves being carpeted with 
beautifully reticulated leaves of Goodyera repens var. opAioides. Ha- 
benaria dilatata is also reported here, probably correctly, though I 
have not yet seen it. 
The clearings are characteristic, generally natural, and frequently 
of considerable extent. //asenaria lacera is unfailingly present, and, 
no matter how dry the soil or the summer, always makes an effort to 
unfold its flowers and develop its seed. As a good example of the 
pertinacity of this species, I found on a very small grass plot not far 
below the summit, at an elevation of something over three thousand 
feet, two specimens just coming into bloom, the date being the seventh 
of August, a month later than its date of flowering in the valleys below. 
The occurrence of Microstylis ophioglossoides in one of these dry, 
grass-covered meadows is noteworthy as so inconsistent with its usual 
habitat. It occurs, so far as I know, only in one place, but is there 
rather abundant and seems to thrive and bloom as well as in more 
congenial swampy localities, though it very seldom develops a seed- 
pod. 
The above observations are based upon personal exploration of a 
portion of the mountain surface, and while not necessarily exhaustive, 
and probably admitting of exceptions and additions for other portions, 
may be taken as a fair statement of the general conditions of growth 
and distribution of Orchidaceae of Greylock Mountain. 
THETFORD ACADEMY, Thetford, Vermont. 
Vol. 2, No. 19, including pages 133 to 158 and plate 19, was issued 
July ro, 1900. 
