Tolypella intricata Leonhardi 1863, p. 32 

 PL 78, Figs. 5-7 



Thallus 8-25 cm. tall, gray-green; sparsely branched with a few 

 primary branches and dense heads of fertile branchlets subtended 

 by laterals of unequal lengtli; the primary ray including but few 

 nodes from which 2 or 3 lateral branches arise, simple or again 

 divided, the laterals but 3 or 4 cells in length, the terminal cell 

 sharp-pointed or sometimes bluntly rounded; fertile branchlets 

 densely clustered and including also long, coarse branchlets of 

 irregular length; the primary branch with 2 or 3 nodes, each bearing 

 3-(4) lateral branches, the ultimate rays of the fertile branches 3- 

 or 4-celled, the lateral branch rays branched at the first node and 

 again branching, sometimes also branching from the second node, 

 these branches simple if there are but 2 nodes in the branchlet; 

 antheridia sessile, up to 0.3 mm. in diameter, lateral at the nodes of 

 the fertile branchlets; oogonia at the base of or on the nodes of the 

 fertile branchlets, several together, appearing above or beside the 

 antheridia; oospore 0.3-0.318-(0.4)mm. in diameter, Hght brown 

 when mature, decorated with 10-11 ridges, the outer membrane 

 yellowish, thin, and granular. 



In hard and semi-hard water lakes, in shallow water where there 

 is protection from wave action and strong currents. Mich. 



Tribe Chareae 



In this tribe the stems usually have but a single branch of 

 unlimited growth arising from the nodes of the stem. The whorls 

 of branchlets are simple, having only short bracts or leaflets at 

 their nodes rather than bifurcations. In one genus, Chara, most 

 species are characterized by having the internodal cells of the stem 

 corticated. The sex organs may be monoecious or dioecious, in our 

 specimens (Chara) with the oogonium borne above the antheridium 

 in the monoecious species. The coronula of the oogonium in this 

 group is composed of but 5 cells, cut off from the tips of the spiral 

 corticating cells of the oogonium. 



CHARA Linnaeus 1754, p. 491 



These plants are usually stout and coarse of texture, when com- 

 pared with Nitella. They are frequently encrusted with lime and 

 thrive best in hard or semi-hard water lakes and slowly flowing 

 streams. It is this character which has earned for them the common 

 name of Stoneworts. The stem in most species is corticated by 

 elements which develop from the node cells in both directions along 



[334 1 



