TrigJochin maritima L., Arrow-Grass 

 Fig. 59. Labrador to Delaware. Zones 

 III, V. 



Potentilla egedei Wormsk. var. groenland- 

 ica (Tratt.) Polunin., Silver Weed 

 Fig. 54. South Greenland to Long Is- 

 land. 



Eleocharis parvula (R. & S.) Link 



Fig. 105. Newfoundland to Louisiana. 



4. Shrubs: 



Iva fnitescens L. var. oraria (Bartlett.) 

 Fern. & Grisc, Marsh Elder, 

 High Tide Bush 

 Fig. 8. With its varieties from west 

 Nova Scotia to Virginia. Zone III, V; 

 on elevations on the marsh, VI. 

 Baccharis halmifolia L., Sea Myrtle, 

 Groundsel Tree 

 Fig. 9. Massachusetts to Florida and 

 Texas. Sexes separate, in the fall the 

 female shrub has cottony tipped seeds. 

 Zones V, VI. 



5. Conspicuous algae of the marsh: 



Ascophyllum nodosum (L.) LeJolis f. 

 scorpioides (Hornemann) Reinke 

 Nova Scotia to New Jersey. Zone II. 

 Tangled masses at the base of Spartina 

 alterniflora and sometimes in Zone III 

 at the base of Salicornia virginica. No 

 sexual reproduction in this form. Great 

 variation in the form. 



Fucus vesiculosus L., Bladder Wrack 

 Ellesmere Island to North Carolina. 

 Variety spiralis may be found here. 

 Zone II at base of Spartina alterniflora. 



6. Plants of the transition, brackish to fresh- 

 water border of the marsh: 



Hibiscus palustris L., Swamp Rose 

 Mallow 

 Fig. 22. Massachusetts to North Car- 

 olina. Zone VI — pink blossom dom- 

 inant on the Cape, white form with pink 

 center also occurs. H. moscheutos oc- 

 curs from Maryland to Florida. 



Scirpus americanus Pers., Three- 

 Square Rush 

 Fig. 102. Newfoundland to Florida and 

 Texas. Zone VI. Forms almost pure 

 stands around pools. 



Scirpus torreyi Olney., Torrey's Rush 

 New Brunswick to Long Island. Zone 

 VI. S. olneyi should also be expected 

 in brackish marshes. Found in Dela- 

 ware. 



Scirpus paludosu^ Nels. var. atlanticvs 

 Fern. 

 Fig. 103. Anticosti Island to lower St. 

 Lawrence River south to New Jersey. 



Spartina pectinata Link., Fresh Water 

 Cord Grass 

 Fig. 95. Prince Edward Island to New 

 Jersey. Zone VI. 



Elymus virginicus L. var. halophilus 

 (Bickn.) Wieg., Terrell Grass 

 Fig. 99. Nova Scotia to Virginia. Zone 

 VI. 



Eleocharis spp.. Sedge 



Fig. 104. Mature seeds must be avail- 

 able to identify to species. It is sug- 

 gested that references be consulted for 

 complete identification. Zone VI. 



Lobelia cardinalis L., Cardinal Flower 

 Fig. 78. New Brunswick to Florida and 

 Texas. Freshwater marshes at edge of 

 tidal marsh. Zone VI. 



Lythrum salicaria L., Spiked Loose- 

 strife 

 Fig. 47. Newfoundland to Virginia. 

 Zone VI. 



Amelanchier laevis Wieg., Shadbush 

 Fig. 17. Newfoundland to Georgia. 

 Species of Amelanchier hybridize read- 

 ily and there may be great variation. 

 Other species of the genus may be pre- 

 sent. Zone VI. 



Juncus baltic7is Willd. 



Fig. 107. Labrador to Pennsylvania. 



SELECTED BIBLIOGRAPHY 



For identification of plants not included here 

 and for further help with the plants listed con- 

 sult the following two manuals. They will also 

 be helpful with the grasses, sedges, and rushes: 



FERNALD, M. L. 



1950. Gray's manual of botany; a hand- 

 book of the flowering plants and ferns of 

 the central and northeastern United 

 States and adjacent Canada. 8th ed. 

 American Book Co., N.Y., 1632 p. 



53 



