CATALOGUE OP PLANTS. 



77 



P. grandidentata, Michx. Large-toothed Aspen. 



Rich woods, borders of streams, and hillsides. B*, fre- 

 quent; Rattle Rock; woods near boundary, N. of Hancock 

 Hill, etc. : — M*i frequent as a small tree in open places in 

 rocky woods. 

 P. balsamifera, L,, var. candicans, Gray. Balm of 



GlLEAD. 



This tree is rare or unknown in a wild state but very common 

 in cultivation. B *, house-site, Hillside St. : — M, occa- 

 sional ; one large tree not far from Black Rock, another by 

 Doleful Pond. 



Sub-class II. MONOCOTYLEDONES. 



ORCHIDACE^E. Orchid Family. 



MICROSTYUS, Nutt. Adder's Mouth. 



M. ophioglossoides, Nutt. 



Low ground. B, very rare ; Cedar Swamp. 



LIPARIS, Richard. Twayblade. 

 L. liltifolia, Richard. 



Moist woods. B, very rare ; base of Buck Hill. 



CORALLORHIZA, Haller. Coral-root. 

 C innata, R. Br. 



Swamps and cool damp woods. B, very rare ; this inter- 

 esting but inconspicuous little plant grows in a single spot in 

 the E. part of the Reservation : — M, rare. 

 C. odontorhiza, Nutt. 



Rich woods. S, very rare ; six plants were found near 

 Overbrook Hill in 1878. 

 C. multiflora, Nutt. 



Dry shady woods. B*, frequent ; Pine Tree Brook valley ; 

 slopes of Great Blue Hill, Rattlesnake Hill, etc. : — M, occa- 

 sional ; Virginia Wood ; N. slope of Bear Hill ; border of 

 brook, E. of Melrose Reservoir. 



