﻿the Lower Susquehanna 489 



46. Rumex altissimus Wood. Island at Safe Harbor. It also 

 occurs in Crawford County, west of the Alleghenies. 



47. Polygonum cilinode Michx. Above Marysville, Perry 



County. Brought down from the mountain plateaus, where it is 

 common. 



48. Polygonum incarnatum Hll. Harrisburg; Safe Harbor ; 

 Peach Bottom. 



49. Silene alba Muhl. Safe Harbor ; Mouth of the Tuc~ 

 quan ; McCall's Ferry. Common on the islands, where Muhlen- 

 burg, no doubt, gathered his first specimens. It belongs west of 

 the Alleghenies and occurs in Armstrong County, Pa. 



50. Sagiua apctala L. . Safe Harbor. 



51. Tissa rubra (L.) Britt. Harrisburg; Safe Harbor. 



52. Nympliaca microphylla Pers. Collins* Ferry. Brought 

 down from the mountain plateaus. 



53. Magnolia tripe tola L. York County in the ravine back 

 of York Furnace and along the river shore. Also in the ravine 

 at Reed's Run, on the opposite side of the river. Local and not 

 abundant. 



54. Asimina triloba (L.) Dunal. Common along the river and 



its tributaries. It is found also on tih 

 County at an elevation of 1,400 feet. 



Juniata 



55- Ranunculus Peuusylrauieus L* f. Chickies. 



56. Cardamine hirsuta L. York County, opposite Marietta, 



Small. 



57. Cardamine arenicola Britt. Safe Harbor, Small. 



58. Cardamine purpurea (Torr.) Britt. York shore, opposite 



Chickies. 



59. Arabis laevigata Burkii Porter. Duncannon ; Harrisburg- 



60. Cheiranthus turritoides Lam. {Br?sim&&z cheiranthoides 

 L.). Harrisburg and Safe Harbor, on the islands. 



61. Polauisia graveolens Raf. Flats along the river's edge. 



Common. 



62. Sedum ternatum Michx. Safe Harbor. Found also on 

 the Juniata and in the western part of the state. 



63. Heuchera pubescens Pursh. Duncannon ; Safe Harbor. 

 On rocky bluffs. Common on the Juniata. 



