EXPLANATION OF PLATE III. 



Fig. 1. PopuLus fastigiata.^ (Family Amentacees.) Dioecious tree. It was origi- 

 nally carried from the Levant into France, and is known in tlie United States as the 

 Lombardy poplar. Trunk vertical. Branches erect, I'astigiate. The staminate flowers 

 onW are known in this country. 



Fig. 2. Salix babylonica. Weeping- willow. (Family AmentacecB.) A Dioecious 

 tree, growing to the height of 35 feet ; it was originally trom the Levant. The fertile 

 plant only exists in this country. Stem branching ; the branches are supple, pendent. 

 Leaves alternate, lanceolate. 



Fig. 3. Chamaerops humiiis. (Family of the Pa^^ns.) Dioecious tree, whose height 

 varies from 4 to 30 feet. It grows in Barbary, Spain, and Italy. Its fruit is called wild 

 dates. 



Fig. 4. Maranta arundinace(B. Arrow-root. (Family Cannce.) Perennial plant, 

 four feet high ; native of South America. Stem herbaceous, slender, branching. 

 Leaves entire, oval-lanceolate, petioled. Petioles short, sheathing. Flowers terminal. 

 The root of this plant affords a substance resembling starch in many of its properties ; 

 this is much valued for its nutritious qualities. The plant belongs to Monandria Mon- 

 ogynia. 



Fig. 5. Sarracenia purpvrea.t (Family undetermined.) Side-saddle flower: an 

 herbaceous plant peculiar to marshes of North America. Leaves radical, ascidiate. 

 Calyx flve-sepalled. Corolla five-petalled. 



Fig. G. DioNAEA muscipula. Venus' fly-trap. (Family uncertain.)! Perennial, 

 herbaceous. Scape vertical, about eight inches high. Leaves radical, radiating from 

 the centre, petioled. Petiole cruciform. Leaf round, folds itself up suddenly on being 

 touched. Flowers corymbed. Decandria Monogynia. 



Fig. 7. VHAt.L.\js impudicus. (Family of the Fw/t^^t.) Mushroom called morel. A, 

 young plant still enclosed in its volva. B, a plant perfectly developed ; a, volva which 

 has burst to make room for the pedicel, h ; c, pileus ; d, umbo, a central part of the liat, 

 which is pierced in its turn. 



Fig. 8. Agaricus cretaceus. (Family of the Fungi.) Mushroom without a volva. 

 a, pedicel ; b, neck ; c, pileus ; d, interior surface, forming a layer for the seeds to rest 

 in ; e, umbo. 



Fig. 9. Boletus salicinus. Parasite. (Family Fungi.) Pileus dimidiate, sessile. 



* The dilitata of most authors. 



■f Liiidley establishes a tiunily, Sarracenim, in which this is the only genus; he considers it to bo 

 allied to Papaveracea;, on account of its dilated stigma, its indefinite number of stamens, and small em- 

 bryo lying at the base of copious albumen. He also thinks it nearly related to Droseracete, or to what- 

 ever family the Dionaja may be placed in. The pitcher-form leaf of the Sarracenia is amilogous to the 

 dilated foot-stalk of the Dionaea, and the lid of the pitcher in the former leaf is represented by the irrita- 

 ble lamina in the latter. In the structure of its leaves, the Sarracenia is related to the family Nepenthe*, 

 Bontaining the pitcher-plant. 



\ Referred by Lindley to Droseraceae. 



