MIDDLESEX FLORA. 35 



*R. rotundifolium, 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. 



Generally 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. Carol! niana, Michx. GRASS OF PARNASSUS. 

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

 Groton (Q.W. Jenks) ; Frainingham, 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. Pennsylvania, 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. 



TlARELLA, 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. 



CRASSULACE/E. ORPINE FAMILY. 



PENTHORUM, Gronov. 



P. sedoides, L. DITCH STONECROP. 

 Common. July-Sept. 



