MIDDLESEX FLORA. 35 



*Ii. rotundifoUum, Michx. 



Reading (W. H. Manning) . June. 

 R. prostratum, L'Her. Fetid Currant. 



Ashby, rather common on and near Mt. Watatic (L. L. Dame). 



May. 

 R. floridum, L'Her. Wild Black Currant. 



Genei-ally distributed in the northern and eastern parts of the 



county, but not very common. May. 

 R. RUBRUM, L. Red Currant. 



Spontaneous in several localities. May-June. Nat. from Eu. 



Parnassia, Tourn. 



P. Caroliniana, Michx. Grass op Parnassus. 

 Reading (W. H. Manning) ; Wakefield (Mrs. P. D. Richards) ; 

 Groton (C. W. Jenks) ; Framingham, abundant (Rev. J. H. Temple) ; 

 Ashland (Rev. Thos. Morong). Rather scarce. July-Aug. 



• Saxifraga, L. 



S. Virginiensis, Michx. Early Saxifrage. 



Very common. _ Apr.-May. 

 S. Pennsylvanica, L. Swamp Saxifrage. 



Common. May-June. 



MiTELLA, Tourn. 



*M. diphylla, L. Mitrewort. 

 Groton (Miss H. E. Haynes) ; Concord, introduced from Vermont 

 by Minot Pratt. May-June. 



TiARELLA, L. 



T. cordifolia, L. False Mitrewort. Groton (C. W. Jenks) ; 

 Concord, introduced from Vermont by Minot Pratt, May-June. 



Chrysosplenium, Tourn. 



C. Americanum, Schw. Golden Saxifrage. 

 Common. Apr.-May. 



CRASSULACEy^:. ORPINE FAMILY. 



Penthorum, Gronov. 



P. sedoides, L. Ditch Stonecrop. 

 Common. July-Sept. 



