103. CHAKA.CE.E. 537 



3. SELAGINEL'LA. Spring. 



1. 8. spinulo'sa (A.Br.) ; 1. uniform scattered lanceolate ciliate, 

 spikes terminal solitary sessile leafy upon short erect branches. 

 E. B. 1148. N. 371. St. prostrate, much branched, rooting, 

 slender. Flowering branches simple, short, erect. Small spoivs 

 muricat-e in 2-valved reniform caps. ; lar^e spores papillose in 

 ;j 4-valved capsules. Boggy spots chiefly in mountainous 

 districts. P. VIII. E. S. I. 



B. Stems of one or more parallel tubes, verticillately branched. 

 Nucules and globules on tue branchlets. 



Order GUI. CHAEACE^E. 



Leafless branched plants with stems formed of one or more 

 parallel tubes. Two Kinds of fructincatiou ; round red globules 

 [antheridia] formed of 8 valves, enclosing cells containing 

 granular matter and spiral filaments ; oval nucules [oogoniaj 

 lormed of 1 cell with 5 filaments folded spirally round it and 

 containing minute granules which appear at last to unite into 

 a single seed. Plants aquatic. The position of this order is 

 very doubtful *. 



1. NITBLLA. Globules and nucules at the forking of the 

 branchlets. Crown of nucule of 10 cells in 2 rows lying 

 upon each other, the upper smaller, usually deciduous. 

 Is o stipulodes. Stem of one tube. 



2. CHARA. Globule taking the place of central bract, below 

 tne nucule [except sp. 2j. Crown of nucule of 5 equal cells 

 in one row, persistent. Stipulodes in 1 or 2 whorls. Usually 

 with cortical cells. 



1. NITEL'LA. Ayardh. 



* Globules terminal in the forking of the branchlets. Nucule* 

 below the (jlobutes. tie j meats nearly equal. AITELLA Braun. 



t Branchlets only once divided into 1 -celled segments. 



1. N- flex 1 His (Ag.); monoecious, st. slender flexible trans- 

 parent, branchlets pointed not niucronate, fertile whorls 



1 See Messrs. Groves' valuable paper in the J. of B. xviii. and xix., 

 where are figures of nearly all tne species. 



