MIDDLESEX FLORA. 



RANUNCULUS, L. 



*J?. aquatilis, L. (R. aquatilis, L., var. heterophyllus, DC. ; Man.) ; 

 FLOATING WATER-CROWFOOT. 



Newton (Bigelow's Fl. Bost.) "Not met with for many years; 

 was possibly introduced from Europe, where this form is common ' ' 

 (Man.) July. 



R. aquatilis, L., var. trichophyllus, Gray. WHITE WATER- 

 CROWFOOT. 

 Ashby, Wilmington, Maiden, et al. Not uncommon. June-July. 



R. multifidus, Pursh. YELLOW WATER-CROWFOOT. 

 Groton, Medford, Concord, et al. Rather common. May-June. 



R. Flammula, L., var. reptans, Meyer. CREEPING SPEARWORT. 

 Lowell, Groton and Tewksbury (Dr. C. W. Swan) ; Concord and 

 Lexington (F. S. Collins); Reading (W. H. Manning). Widely 

 distributed, but not common. June-Aug. 



R. Cymbalaria, Pursh. SEA-SIDE CROWFOOT. 

 Marshes; Cambridge (Bigelow's Fl. Bost.); Medford (Mrs. P. D. 

 Richards); Maiden (F. S. Collins). Not very common. June- 

 Aug. 



R. abortivus, L. SMALL-FLOWERED CROWFOOT. 

 Common. May- June. 



R. abortivus, L., var. micranthus, Gray. 

 Melrose (C. J. Sprague; Rev. Thos. Morong). United with the 

 type by a graded series of specimens. May-June. 



R. sceleratus, L. CURSED CROWFOOT. 



Somerville (C. E. Perkins) ; Cambridge (F. S. Collins) ; Belmont 

 (H. S. Richardson) ; Waltham List. Scarce. May-July. 



R. recurvatus, Poir. HOOKED CROWFOOT. 

 Maiden, Belmont, Lowell, et al. Scarce. May-June. 



*R. Pennsylvanicus, L. f. BRISTLY CROWFOOT. 

 Concord, rare (Minot Pratt) . 



R. fascicularis, Muhl. EARLY CROWFOOT. 

 Common. April-May. 



R. repens, L. CREEPING CROWFOOT. 

 Medford, Townsend, Concord, et al. Not uncommon. May-July. 



R. BULBOSUS, L. BUTTERCUPS. BULBOUS CROWFOOT. 

 Very common. Forms with double flowers occasional. May- 

 July. Nat. from Eu. 



R. ACRIS, L. TALL BUTTERCUPS. 

 Very common. May-Aug. Nat. from Eu. 



ISOPYRUM, L. 



*7. biternatum. Torr. and Gray. 

 Concord ; introduced from Michigan by Minot Pratt. May. 



