may be great variation. Other 

 species of the genus may be 

 present. Zones V, VI. 



Populus tremuloides Michx., 

 Quaking Aspen 

 Fig. 13. Labrador to Virginia. 

 Zone VI. 



Spiraea alba DuRoi., Meadow- 

 sweet 

 Fig. 24. Quebec to Delaware. 

 Bog hollows. Zones IV, VI. 



Spiraea tomentosa L., Hard- 

 hack, Steeplebush 

 Fig. 25. Prince Edward Island 

 to North Carolina. S. latifolia 

 may also occur. In the key it 

 precedes Figure 24. In bog hol- 

 lows. Zones IV, VI. 



ii. Herbaceous plants: 



Panicum virgatum L., Switch 

 Grass 

 Fig. 100. Maine to Florida and 

 Mississippi. P. longi folium 

 grows in the same habitat, more 

 southerly in distribution, occurs 

 in southeastern Massachusetts. 

 Zone VI. 

 Polygovella articulata (L.) 

 Meisn., Jointweed 

 Fig. 84. Maine to North Car- 

 olina. 

 Gerardia maritima Raf., Sea- 

 side Gerardia 

 Fig. 46. Yarmouth County, 

 Nova Scotia, to North Carolina. 

 Zone VI. 

 Rosa palustris L., Swamp Rose 

 Fig. 7. Nova Scotia to Florida. 

 R. Carolina may also occur, less 

 common. Zone VI. 

 Oenothera parviflora L. var. 

 oakesiana (Gates) Wieg., 

 Small Flowering Evening- 

 Primrose. 

 Fig. 79. Plymouth County, 

 Mass., to Northampton County, 

 Va. Look for 0. humifiisa Nutt. 

 from New Jersey to Florida. 

 O. biennis may also occur, as it 

 is widely distributed. 



Ambrosia artemisiifolium L., 

 Ragweed 

 Fig. 72. Newfoundland to Flor- 

 ida and Texas. A pernicious 

 weed. One of the causes of hay 

 fever in the late summer. Zone 

 VL 

 Lycopus rtibelhis Moench., 

 Bugleweed 

 Fig. 49. Southern New Eng- 

 land to Florida and Texas. 

 Other species of the genus may 

 be present. Zone VI. 

 Polygala palygama Walt. var. 

 obtusa Chodat., Milkwort 

 Fig. 85. Nova Scotia to Florida 

 and Texas. Zone VI. 

 Pteridijim aqidlinum (L.) Kuhn., 

 Bracken Fern 

 Fig. 43. Cosmopolitan plant. 

 Newfoundland to North Caro- 

 lina. Zone VI. 

 Chrysanthemum leucanthemum 

 L., Ox-Eye Daisy 

 Fig. 81. Labrador to Florida. 

 Several varieties. A common 

 but attractive weed. Zone VI. 

 Gnaphalinm obtusifolium L., 

 Cudweed, Common Ever- 

 lasting 

 Fig. 80. Prince Edward Island 

 to Florida and Texas. Zone VI. 



b. Transition to tidal marsh: 



Spartina patens (Ait.) Muhl., Salt 

 Marsh Hay 

 Fig. 94. Newfoundland to Virginia. 

 Zone VI. 

 Atriplex arenaria Nutt., Seabeach 

 Orach 

 Fig. 36. New Hampshire to Texas. 

 Zone VI. 

 Limonium carolinianum (Walt.) 

 Britt., Sea Lavender 

 Fig. 61. Newfoundland to Florida 

 and Mississippi. Flower panicles 

 can be dried for winter bouquets. 

 North of Cape Cod L. nashii is more 

 common. Zone VI. 

 Spergularia marina (L.) Griseb., 

 Sand Spurrey 

 Fig. 52. Quebec and south along 



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