206 Rhodora [November 



Great Pubnico Lake, September (i, 1920, Fernaid, Lout/ & hinder, 

 no. 21,395; hank of East Branch of Tusket River, Quinan, October 

 8, 1920, Fernaid & hinder, no. 21,396. Maine: damp woods, Qrono, 

 September, 1887, Fernaid; South Poland, October, 1893, Furbish; 

 Brunswick, August 26, 1913, Furbish. Vermont: Rutland, October 

 ;i, 1898, EggUston. Massachusetts: Georgetown, C. N. 8. Horner; 

 damp rocky woods, West Roxbury, October 10, 1890, II'. /'. Rich; 

 low woods, Montague, May 11, 1912, Wheeler & Wiegand. 



* RlBES HIRTELLUM Michx., var. CALCICOLA Fernaid, ElHODORA, 

 xiii. 70 (1911). Commoner in Nova Scotia than the typical form of 

 the species. The varietal designation a misnomer. 



R. LACUSTBE (Pers.) Poir. Swampy woods, Cumberland Co. to 

 Hants Co. and Cape Breton. 



R. TBISTE Pallas, var. ALBINERVIUM (Michx.) Fernaid. Rich low 

 woods, Cumberland Co. to Hants Co. and Cape Breton. 



** Pyrus arbutifolia (L.) L. f. Frequent in Yarmouth Co. : 

 sterile meadows, Arcadia; gravelly thicket by Salmon (Greenville) 

 Lake; thicket by Butler's (Gavelton) L.; thicket by Great Pubnico 

 L. Fruit cherry-red, maturing later than that of the commoner P. 

 ARBUTIFOLIA, var. ATBOPUBPUBEA (Britton) Robinson. See p. 166. 



P. dumosa (Greene) n. comb. Sorbus Aucuparia, /?. Michx. Fl. 

 Bor.-Am. i. 290 (1803). P. sambucifoiia of Fastern American records, 

 not C. & S. P. americana, var. decora Sarg. Silva, xiv. 101 (1892). 

 8. dumosa Greene, Pittonia, iv. 129 (1900). 8. scopulina Greene, 

 I. c. 130 (1900). S. subvestita Greene, 1. c. (1900). Pyrus sitchensis 

 Piper, Mazama, ii. J 07 (1901) in part, not Sorbus sitchensis Poem. 

 8. decora (Sarg.) Schneider, Bull. Herb. Boiss. ser. 2, vi. 313 (1906). 

 —Apparently throughout, but less common than P. americana. 



Sorbus sitchensis Roem. Syn. Mon. iii. 139 (1847), the nomencla- 

 torial basis of Pyrus sitchensis (Roem.) Piper, with which our shrub 

 and small tree has been recently identified, proves, according to 

 Render, to be the S. pwnila Raf. which was later described as P. 

 occidenialis Watson. This species certainly has little to do with our 

 large-fruited tree and shrub; but there seems to be no specific distinc- 

 tion between the common Rocky Mountain species and ours. 



Frere Arsene has collected on Miquelon a hybrid of /'. americana 

 with P. arbutifolia, var. atropurpurea. Similar hybrids of P. ameri- 

 cana or the introduced P. Aucuparia with P. arbutifolia and /'. 

 meianocarpa are occasionally found in New England. Such frequent 

 occurrences of natural hybrids between these species, which are con- 

 sidered by many authors as distinct genera (Sorbus and Aronia) 

 would seem to weaken the line of separation between these "genera." 



** Amelanchier stolonifera Wiegand, RfiODOBA, xiv. Ill 

 (1912). Apparently not common in the province. Annapolis Co.: 

 boggy depressions and moist thickets on sandy plains, Middleton. 



