STRUCTURAL BOTANY. 17 



acecB I 92. Buckwheats^ or Sorrelworts, Polygonacece ; 

 93. Laurels, LauracecR ^ 94r. Dajphnads, Thymelacece ; 

 95. Oleasters, Elceagnacece / 96. Sandalworts, Santalacce ; 

 97. Loranths, or Mistletoes, LoranihacecB ; 98. Saururads, 

 or Lizards' -tails, Saiirwacece ; 99. Llornworts, Cerato- 

 phyllacece ; 100. Eiverweeds, PodostemctcecB ; 101. Water- 

 starworts, Calliti'ichacece j 102. S])urgeworts, Eujyhorhia- 

 ceoe ; 103. Crowberries, Em])etra€e(B ; 104. Nettieworts, 

 Urticacece ( TJlmaceoB, Artocarpaceoe, and TJrticace(B verce) ; 

 105. Sycamores, PlatanacecB ; 106. TFaZTii^^^, Juglanda- 

 cece ; 107. Mastworts, Ctiimliferce ; 108. Galeivorts, 

 Myricaceoe ; 109. Birchworts, Betulaceoe ; 110. Willows, 

 SalicacecB. 



(The Conifers, spoken of above, make up the 111th 

 order.) 



5S. The CLASS ENDOGENS is divided into ^Ar^^ 

 S lib-classes : the Spad Iclflorous, the Florideous, and the 

 Glumaceous Endogens, (The orders enumerated here oc- 

 cm* hi the Northern and Middle States.) 



I. SrAD rciFLOROUs Sub-class. 



53. The plants of this sub-class have flowers destitute 

 of perianth, or furnished with a scaly perianth only, and 

 massed on a thick, fleshy, and commonly club-shaped axis 

 (spadix), the latter generally wrapped in a sheathing-leaf 

 {spatha). To this spadiciflorous sub-class, however, we 

 also refer plants whose flowers are not attached to a 

 spadix, bnt scattered. In this case, the flowers are always 

 perianthless. 

 Orders : 



11% Aroids, AracecB ; 113. Typhads, Typhacece ; 111. 

 Duchweeds, or Duchneats, Le7nnaGecB i 115. Najads, 

 Najadacea, 



