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3523. High-bush blackberry.—The fruit of Rubus argutus Link. Native of the 
eastern United States. Collected by H. H. Rusby, at Mount Airy, North 
Carolina. 
3524. Another specimen of the same. Collected by P. A. Rydberg at Alpine, 
New Jersey, July 26, 1906. 
3525. A flowering specimen of the same. Collected by R. S. Williams in the 
New York Botanical Garden, June, 1919. 
3526. Clustered blackberry.—A flowering specimen of R. frondosus Bigel. Native 
of eastern and central North America. Collected by John Uri Lloyd in 
Boone County, Kentucky, May 19, 1919. 
3527. A fruiting specimen of the same. Same locality and collector, August 19, 
1919. 
3528. Another fruiting specimen of the same. Collected by R. M. Harper, at 
Tuscaloosa, Alabama, July 11, 1919. 
3529. The fruit of Rubus pergratus Blanchard. Native of northeastern North 
America. Collected at Marlboro, New Hampshire, September 1, 1919. 
3530. Another specimen of the same. Same collection as the last. 
3531. Canadian blackberry.—The fruit of R. canadensis L. Native of eastern and 
central North America. Collected by P. A. Rydberg at Farmerville, 
New York. 
3532. Another sample of the same. Collected by H. H. Rusby at Marlboro, 
New Hampshire, September 1, 1919. 
3533. Plaited-leaved blackberry—The fruit of Rubus plicatifolius Blanchard. 
Native of the eastern United States. Collected by P. A. Rydberg at 
Alpine, New Jersey. 
3534. Common dewberry.—The fruit of Rubus procumbens Muhl. Native of the 
eastern and central United States. Collected in Bronx Park, by W. N. 
Clute, August, 1900. 
3535. Another specimen of the same. Collected by P. A. Rydberg at Alpine, 
New Jersey. 
3535-1. Another sample. Collected by H. H. Rusby at Sea Girt, New Jersey, 
July 27, 1920. 
3536. Running blackberry.—The fruit of Rubus Enslenit Tratt. Native from 
Massachusetts south and west to Texas. Collected by H. H. Rusby at 
Mount Airy, North Carolina, June 18, 1909. 
3536.1. Another specimen of the same. Collected by H. H. Rusby at Sea Girt, 
New Jersey, July 27, 1919. 
3537. Bearded running blackberry.—The fruit of Rubus setosus Bigel. Native of 
the northeastern United States. Collected by H. H. Rusby, at Marlboro, 
New Hampshire, September 1, 1919. 
3538. Bristly running blackberry.—The fruit of Rubus hispidus L. Native of 
damp woods of eastern North America. Collected by H. H. Rusby at 
Marlboro, New Hampshire, September I, 1919. 
3539. Another sample from the same place. 
3540. Mexican blackberry.—The fruit of Rubus sp. Native of Central Mexico. 
Acquired by H. H. Rusby on the summit of the mountains above Cuerna- 
vaca, Mexico. 
