174 SEVENTEENTH REPORT. 



A. Canadensis (Lin.) Medic, Var. rotundifolia, (Mx.) T. c^ G. Fl. 

 N. A. 1, 473, 1840. 



Crataegus spicata Lam. Encyl. 1, 84, 1783. 



Mespilus Canadensis var. rotundifolia Mx. Fl. Bor. Am. 1, 291, 1803. 



Amelanchier sanguinea (Ph) D. C. Prod. 2, 633, 1825. 



Amelanchier spicata (Lam.) K. Koch, Dcndr. 1, 682, 1869. 



A tall shrub or tree but not so large as the specific tj'pe. The leaves 

 broader, often orbicular but acute. Thinly tomentose but glabrous 

 or nearly so at time of flowering. Moist or dry woods and thickets. 

 Farwell No. 48, Aug. 9, 1883. No. 48a, Aug. 10, 1883 and No. 50, 

 Aug. 13, 1883 from the Keweenaw Peninsula; No. 49b, May 13, 1893 

 from Detroit; No. 48c, April 23, 1910, No. 2777, June 30, 1912, No. 

 3339, May 4, 1913 and No. 3354, May 11, 1913, from near Rochester; 

 No. 3330, May 4, 1913, from Parkedale Farm. 



Amelanchier Canadensis (Lin.) Medic, var. alnifolia (Nutt.) T. & 

 G. Fl. N. A. 1, 473, 1840. 



Amelanchier Canadensis alnifolia T. & G. Fl. N. A. 1, 473, 1840. 



Aronia alnifolia Nutt Gen. 1, 306, 1818. 



Amelanchier alnifolia Nutt. Roemer, Syn. Man. 3, 147, 1847. 

 Nuttall described his Aronia alnifolia as a low shrub 4 or 5 ft. in 

 height. The name as at present understood is applied to a tree 30 ft. 

 or thereabouts. All the Michigan plants have been referred to A. 

 florida and A. alnifolia has been eliminated from the eastern flora; 

 but this is an error. True A. alnifolia is found here and is quite 

 frequent in the Lake Superior region. A. florida is frequent around 

 Rochester and probably at other places. Both have ovate to 

 obicular leaves, but A. alnifolia has a bole and is therefore tree-like 

 in habit if not in stature while A. florida is densely caespitlose, 

 producing many stems; both have about the same height, 2-10 feet. 

 It is customary to apply the name A. alnifolia to certain western 

 trees but why so is difficult to determine, as the species was 

 originally described as a shrub, but whether tree-like or caespitose is 

 not indicated. Farwell No. 51, August 13, 1883, from the Keweenaw 

 Peninsula; No. 907|, August 29, 1895, from near Orion. 



Amelanchier Canadensis (Lin.) Medic, var. semiintegrifolia (Hook) 

 N. Comb. 



Amelanchier ovalis var., semiintegrifolia Hook Fl. Bor-Amer. 1, 202, 

 1834. 



A. florida Lindl. Bot. Reg. 19 pi. 1589, 1833. 



A caespitose shrub 10 feet or less high ^vith smaller leaves than those 

 of the preceding though of the same general shape. Farwell No. 51d 

 April 23, 1910, and No. 3332 May 4, 1913 from Rochester; No. 2779 

 June 30, 1912, from Parkedale Farm; No. 3335 May 4, 1913, from 



