p. maritima Marsh. Beach-Plum. 



Common along the coast at upper limits of heaches anrl in dimes; locall_\- inland 

 in sandy soil in southeastern New Hampshire. 



P. americana Marsli. Wild Plum. 



Thickets and fence-rows; Surry and Alstead in Chesliirc C\)unty where perhaps 

 indigenous and Durham where undoubtedly introduced, though now spreading. 



P. nigra Ait. Canada Plum. 



Frequent and widespread at low elevations, chiefly in roadside thickets and edges 

 of woods; always appearing introduced in northern New Hampshire, perhaps partly 

 native southward. 



P. susquehanae WilUi. Sand-Cherry. 



Common in and near Merrimack Valley extending nortli to .-\shland, one station 

 in lower Connecticut Valley at Hinsdale, and occasional in northern Strafford and 

 Carroll counties; sandy shores and dry warm rocky slopes: Rhodora 25 :()'^-74, 1923. 



P. depressa Pursh. Sand-Cherry. 



Local in Androscoggin River Valley at Shelburne, fre(|uent in Pemigewasset River 

 Valley from Thornton to Ashland in Grafton County and in Connecticut Vallev 

 from Bath to Walpole ; river ledges and gravels usuallv below high-water line: Rho- 

 dora 25 :6')-74, 1923. 



P. pensylvanica L.f. Bird-or Pin-Cherry, 



General and conuiion tliroughout state at low and medium ele\'ations ; most abun;]- 

 ant in burned and cut-over woodland, also in rocky sparse woods and on ledges. 



P. avium L. Sweet Cherry. 



Rare escape; one collection from Durham near (ireat Bay: introduced from Eurasia. 



P. Cerasus L. Sour Cherry. 



Occasional escape in Durham, Lee and Hanover, probably not mucli spreading: 

 introduced from Asia. 



P. serotina Ehrh. Black or Rum-Cherry. 



General and common at low elevations; well drained woods, roadsides and edges 

 of fields. 



P virginiana h. Choke- Cherry. 



Wide ranging and abundant at low elevations, occasionally ascending to 3,500 feet; 

 roadside thickets, edges of woods, open rocky slopes, ledges, and river banks. 



Gleditsia triacanthos L. Honey-Locust. 



Occasional escape along fence-rows, chiefly in soutliern New Hampshire : natural- 

 ized in New England from farther west and south. 



Amorpha fruticosa L. Ealse Lidigo. 



Liifretjuent escape : Dummer in Coos County and Durham in Strafford County : 

 introduced from farther west and south. 



Robinia Pseudo-Acacia L. Black Locust. 



Frequent escape from cultivation, of rather general distribution; near houses, along 

 roadsides, and fence-rows; more common in central and southern New Hamnshire, 

 absent from northern Coos County : naturalized from farther south in United States. 



R. viscosa \^ent. Clammy Locust. 



Escape from cultivation, locally common near houses and along roadsides in central 

 and souti.ern New Hampshire : naturafized from farther south in United States. 



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