1902] THE ECOLOGY OF THE DELAWARE COAST 303 



posed of plants which occur elsewhere only rarely or not at all. 

 Among a thicket of blackberries, indigo, and cedars was found 

 the only plant of Crataegus coccinca [C. pruijiosa Wendl.) appear- 

 ing in the whole region. Vitis aestivalis and Festiica octoflora [F. 

 teneiia) were also found here only. Besides these, there appeared 

 the usual heath forms: Andropogon, Leches,, Mei^omia obtusa^ 

 Lespedeza capitata, Hudsonia, Panicurn sphaerocarpon, with Solidago 

 sempervirens , Galiimi pilosutn^ and Poa pratensis. By roadsides 

 and near dwellings were found such plants as Pla7itago lanceolata ^ 

 Poa pratensis y Daunts Carota, Achillea Millefolium^ Lepidium virgi?n- 

 cum. Chrysanthemum Leuca?ithemum^ etc., while one clump of 

 Opuntia sp. occurred back of a cottage at the extreme end of the 

 village. 



B. Wooded region. — i. Thicket formation.— This forma- 

 tion was merely glanced at in one situation, therefore no general 

 idea can be formed of its character. At this one point were 

 found Aroftia arbutifolia [Pyrus arduti/olia) , Mains malus i^Pyrus 

 malus^ from cultivation, Seriocarpus astroides (5. conyzoides)^ Ilex 

 glabra, L opaca, Vacci?tium corymbosttm, V, arbor etint, Jwdperus vir- 

 giniana, and Piniis rigida. With these forms occur man}" heath 

 species, for this formation grades on the one hand into the heath 

 and on the other into the pine forest. 



2. Forest formation. — About a mile west of the village the 

 oak woods appear as a belt back of the pine region. Here 

 appears Quercus digitata^ which gives place to Q, alba, Q. coccinea^ 

 and Q. nigra, with an occasional Hicoria ovata {^Carya ovata) . In 

 the oak woods a canal has been started towards Rehoboth bay, 

 but it is now abandoned, forming a deep cut partly filled with 

 water and supporting a swamp flora. The excavation has broken 

 up the fixed condition of the soil, and just west of the canal, pos- 

 sibly composed of the excavated sand, rises a fair-sized dune 

 {Jig. 10). At this distance from the coast the northeast and 

 southwest winds seem to be about equal, and the dune is **going 

 both ways,*' a process resulting in a flattening of the crest. It is 

 of rather loose sand, with very little vegetation; grasses and 

 occasionally a composite or sedge were all that gave it character. 



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