CL. XXIV.] CRYPTOGAMIA. 385 



what halbert-shaped ; calyx of the fruit tuberculated at the sides. 



Stem and leaves dull-green, slightly mealy, often reddish. 



Annual: flowers in 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. angustifolia. Spreading Narrow-leaved Orache, Stem her- 

 baceous ; 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. ere'cta. 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 powdery : 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 sinu- 

 ated and covered on the back with sharp tubercles. Annual : 

 flowers in August and September : grows on the sea-shore : fre- 

 quent. Eng. Bot. vol. x. pi. 708. Eng. Fl. vol. iv. p. 260. 1461 . 



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

 dulated, spreading ; leaves inversely egg-shaped, entire ; seed- 

 bearing flowers stalked, wedge-shaped. Stem and leaves mealy. 



Annual : flowers in August and September : grows on the sea- coast 

 of the south of England 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 fructification.^ 



* Capsules in masses, or Sori, on the back of a leafy 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 ultimate divisions of the frond. 



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

 Covers, membranous coverings for the sori. 

 2K2 



