CL. XXIV.] CRYPTOGAMIA. 385 



June and July : grows in cultivated and waste ground : common. Eng. 

 Bot. vol. xiii. pi. 936. Eng. Fl. vol. iv. p. 257. 1458. 



4. A. angustifiilia. Spreading Narrow-leaved Orache. Stem herba- 

 ceous ; leaves lance-shaped, entire, the lower ones three-lobed ; calyx of 



the fruit halbert-shaped, slightly tuberculated at the sides. Resembles 



the former, of which it is probably only a variety. Annual : flowers in 

 July : grows in cultivated and waste ground : common. Eng. Bot. 

 vol. xxv. pi. 1774. Eng. Fl. vol.iv. p. 259. 1459. 



5. A. erecta. Upright Spear- leaved Orache. Stem herbaceous, erect ; 

 leaves broadly lance-shaped, the lower ones sinuate ; calyx of the fruit 

 covered with sharp tubercles. Leaves alternate, stalked, slightly pow- 

 dery : clusters terminal, erect, compound. Annual : flowers in August : 

 grows in waste ground : very rare. Battersea fields, London. Eng. Bot. 

 vol. xxxi. pi. 2223. Eng. FL vol. iv. p. 259. 1460. 



6. A. littordlis. Grass-leaved Sea Orache. Stem herbaceous, erect ; 

 leaves all linear, entire or toothed ; calyx of the fruit sinuated and 

 covered on the back with sharp tubercles. Annual : flowers in August 

 and September : grows on the sea-shore : frequent. Eng. Bot. vol. x. 

 pi. 708. Eng. Ft. vol. iv. p. 260. 1461. 



7. A. pedunculdta. Stalked Sea Orache. Stem herbaceous, undu- 

 lated, spreading ; leaves inversely egg-shaped, entire ; seed-bearing flow- 

 ers stalked, wedge-shaped. Stem and leaves mealy. Annual : flowers 



in August and September : grows on the sea-coast of the south of Eng- 

 land and Ireland : frequent. Eng. Bot. vol. iv. pi. 232. Eng. Fl. vol. iv. 

 p. 261. 1462. 



CLASS XXIV. CRYPTOGAMIA. 



Plants presenting none of the characters of the preceding 

 classes. 



(Only three of the Orders of this very extensive Class are here given.) 



Order I. FERNS. Plants consisting of a Frond, with dorsal 

 or terminal fructijication.-\ 



* Capsules in masses, or Sori, on the back of a leaf y frond, each capsule 

 two-valved, bound with a jointed, elastic ring. 



1. GRAMMI'TIS. Sori oblong, straight, scattered. Cover none. 



f A few additional terms are employed in this order ; 

 A frond is a leaf bearing the fructification. 



The stalk of the frond is the part which elevates it from the ground. 

 The shaft is the direct continuation of the stalk. 

 The partial stalks are the branches of the shaft. 



The central rib is the rib or vein which runs along the middle of the ulti- 

 mate divisions of the frond. 



Sori, masses or groups of capsules, arranged on the back of the frond. 

 Covers, membranous coverings for the sori. 

 2 K 2 



