414 



II. FLOWERLESS PLANTS. 



Substance of the plant wholly of cellular tissue (except- 

 ing in the Subclass Buctulosce which has a few ducts). 

 No woody fibre. No true flower with stamens and pistils. 

 No distinct embryo nor cotyledons. 



Class III. 

 CRYPTOGAME^ DUCTULOS^. 



Plants with a few ducts amongst the cellular tissue '- 



Order XCVIII. EQUISETACE^E. 



Leafless branched plants with a striated fistular stem, joints 

 sheathed above each joining. Sporules surrounded by elastic 

 clavate filaments and inclosed in capsules arising from the peltate 

 scales of terminal cones or spikes. — Vernation straight. Cuticle 

 abounding in silex. Only one genus. 



1. Eqtjisettjm Linn. Horse-tail. 



* Fertile stems mostly unbranched and succulent ; harren stems 

 with whorled branches, appearing later. 



1. E. arvense (L.); sterile st. with few furrows slightly sca- 

 brous, branches rough with 3 or 4 simple angles, teeth of sheaths 

 long acute l-ribbed at the tip, fertile st. simple with few lax 

 distant sheaths.— JB. B. 2020. S. 1. N. 77.— Sterile st. many, 

 procumbent or ascending ; with many whorls of roughish usually 

 simple branches, having 3- or 4-toothed sheaths ; general 



' {N.) refers to Newman's History of British Ferns, ed. 2. (5.) to 

 Sowerty's Ferns of Britain and Fern-allies. Moore's liandieoi of 

 British Ferns may be consulted with advantage. 



