MARYLAND WEATHER SERVICE 247 



in the increase in the number of humus-loving plants, and of suc- 

 culent herbaceous undergrowth. A typical spot of this character 

 is found along the route of the trolley from Myersville to Hagers- 

 town, close to the top of the gap by which the road passes over the 

 Blue Eidge mountain (Plate XXII., Fig. 2.) 



Standing water, and slow moving and shallow streams are found 

 at several points along the tracks, and furnish a rather uniform 

 list of plants for the several places. Sphagnum is one of the com- 

 ponents of the upland bog, and the Swamp Blackberry (Rubus 

 hispidus) is usually present with Acer rubrum, and the Osmunda 

 regalis. The small-flowered bog orchid, and its more showy rela- 

 tives Hahenaria clavellata, Habenaria Jacera are here in the edges 

 of the wet ground, within the shade of the woods, and at a little 

 distance from the damper spots there is an abundance of the 

 Whorled Orchid, (Pogonia verticillata) growing in the humus of 

 the chestnut-oak forest. Monotropa uniflora assists the other humus 

 plants in decomposing the fallen leaves into wood soil, and is found 

 here in large colonies. The various Ericaceous plants, as Vac- 

 ci a in in, Gaylusaccia, Epigaea, Azalea, Kalmia, Leucotlioe, Xolisma 

 and Gaultheria are distributed through the area and supply much 

 of the more shrubby undergrowth. Both Xyris flexuosa, and Sisy- 

 rinchium graminoides are to be found in the immediate vicinity, 

 and a rare plant of Isoetes englemanni may reward a careful search. 

 The list of species does not add materially to those previously 

 recorded, the increase in frequency of the moisture loving, and the 

 corresponding lessening in the numbers of drier ground plants, 

 being the chief change that is noticed. The woods are still of 

 Chestnut and Oak, and the other species present do not show great 

 differences from previous stations. Here the Tulip-Tree is some- 

 what less common than at some of the other places visited. There 

 is but a small amount of pine in the forest, but an occasional stand 

 of White Pine is to be found on some exposed places, also Scrub 

 Pine and Black-Jack Oak and rarely Table-Mountain Pine are to 

 be discovered. 



On the cut-over slopes of the mountain a considerable degree of 

 reforesting is in progress through the self-seeding of the Locust, 

 which has already been noted in several localities as a fence-row 



