MICHIGAN ACADEMY OF SCIENCE. 257 



Traverse Bay and Alpena in Beal's Michigan Flora. I have collected it 

 from Rochester, No. 15331/^, July 4, 1896, and from Macomb Co. in 

 vicinity of Disco, No. 4158, May 25, 1916. 



HAMAMELIDACEvE. 



A few years ago Dr. Sargent described a new species of Hamamclis, 

 H. vernalis, flowering, as the specific name indicates, in the spring. A 

 search for this species in Michigan has not disclosed its presence here. 

 But unlooked for conditions concerning H. Virginiana were discovered 

 which may be of sufficient interest to others to have them placed upon 

 record. One of the characters of H. vernalis is the red inner surface of 

 the calyx lobes. In H. Virginiana the inner surfaces of the calyx lobes 

 are yellow at the beginning of the flowering season, usually in September 

 in this locality, but gradually grow darker until, at the end of the flower- 

 ing period which is about the close of the year, most of them are red ; all 

 of them are red when vegetation begins in the spring; at least no calyx 

 lobe has been discovered that was yellow on the inner surface at this 

 time. Individual slirubs were found that had red calyx lobes from the 

 beginning and some even had petals with tlie lower portion red. The 

 parti-colored ]ietals, however, were not numerous, nor, in all eases, were 

 all the petals of the one flower bicolored. 



POMACES. 



Pyrus melanocarpa (Mx.) Willd. 



Said to be frequent throughout the state, Bloomfield, No. 4201, June 

 15, 1916; Vic. Palmer Park, No. 4403, August 27, 1916. 



Pyrus melanocarpa (Mx.) Willd. var. atropurpurea (Britton), N. 

 Comb. 



Aronia atropurpurea Britton, Man. 517, 1901. 



Pyrus arbutifolia var. atropurpurea Robinson, Rhodora X, 33, 1908. 



Pyrus arbutifolia is credited to Michigan in Beal's Michigan Flora. One 

 of the localities given is St. Clair Co., C. K. Dodge. Dodge's specimens 

 in the Herbarium of Parke, Davis & Co., although distributed as 

 P. arbutifolia are of this variety. It is probable that all so-called 

 P. arbutifolia collected in Michigan is of this variety and the species 

 should be excluded from the Michigan Flora. In P. arbutifolia the 

 calyx lobes are very glandular and the small, ripe fruit is bright red ; 

 in P. atropurpurea the calyx lobes are glandless or nearly so and the 

 fruit is much larger and purple or black. I have not seen P. arbutifolia 

 from Michigan which is outside of the generally accepted range of the 

 species. The two varieties or species have come under my observation 

 9 



