PLANTS OF XERIC HABITATS 



169 



air chambers, but, in general, they are less extremely hydric and have 

 a tendency to ai)pn)ach a resemblance to mesophytes. Roots of 

 swani]) ])lants are frequently horizontal, or even ascending, rather 

 than descending. Iviiizomes are greatly develoj)ed and there is an 

 abundant development of vertical chlorophyll-bearing organs, 

 whether stems or leaves. 





Fig. 74.— Skunk cabbage {Symplocarpus foetidus). Plants of swampy places. 



-.. i..&. 



IVaiS^i. .-■*:-;-• a^^f'. n.t'l^ '-i 



1 .. \ d 



Fig. 75. — A cat-tail swamp. The most abundant plant is Typha latifolia, a 



hydrophyte, 



108. Plants of Xeric Habitats.— There are two general types of 

 xeric habitats, those in which there is an actual dearth of water and 

 those which contain an abundance of water but are physiologically 

 dry. The latter will be discussed in Paragraph 109. 



