THE FLORA OF NKi'.i; U9£ \. 



s^ NOPSIS. 



Filaments simple 



E llaments branched Bulbociiai (• 



I. OEDOGOtflUM Link Nees. II. .r. Phys. Berol., 5. L820. 



Thallus of simple, articulate filaments; vegetative cells cylindrical; terminal 

 cells often elongated or setiform; basal cell often lobed; propagation by 

 zoospores; reproduction by dioecious or mon »i 

 therids; fertilization by means of spermatozoids. 

 Etymology: Greek oidog, swollen, and ,- u, joint 



Oedogoninm vrolleannm Wittb. Rab. Alg. Eur. 2, n. 2547. 



Dioecious, idio-androsporous; oogones single or 2 5, rarely more, in a Beriee, 



oval or elliptical, often terminal; oospore oval, marly filling th gone 



more or less densely longitudinally cost ate; androsporangium6to 10-i 

 dwarf males, slightly curved, seated on the supporting cells; supporting 

 cells slightly tumid, 58-65x115-140^; vegetative cells, 18 35/ in diam., 

 3-7 times as long; oogone, 05-80x78 90//; oospore, 05 7 ,,,. ,,, 



dwarf males, 18-20x00 70 fi; sperm-cell, 12-14x10 L2 



In ponds, Minden. PI. XXL, Fig. 2, a, b, c. 

 Oedogon i inn >la- ii m l« Kuetz. Sp. Alg., 308. 1849. 



Dioecious, with narrow, elongated male plants; oogone single, slightly tumid, 

 subcylindrical, opening by a pore above the middle; oospore sabcylindri 

 cal, or globose, ellipsoid, occasionally si [ghl l.v constricted in the middle, 

 nearly filling the oogone; male plants more narrow than female; sper 

 mogones 1-3 celled, alternating with vegetative cells, terminal, elongated* 

 vegetative cells, 12 40 ,« in diam., \% "J times as long; oogones, 15 

 75 fi; oospores 45-49x50-00 /j., sperm-cell 36 38x7 1" 



Common in pools in the western part of the state, l'l. XXII . pjg, \ ,,, |, 

 Oedogoiiinm polymoi plium Wittb. and Lindh. Prod Monog. « ledog., 12 1871 



Monoecious, oogone single, rarely geminate, globose or ovoid opening above 

 the middle by a pore; oospore globose, not filling the oogone; antherid 

 1-10 celled, often terminal, epigynous, vegetative cells B 1 1 in diam., I 10 

 times as long; oogone, 30-35 /i in diam., oospore 25 : |) in diam; sperm- 

 cells, 8 fi in diam. 



On Vaucheria in Dead Man's Run, Liiicolu. l'l. X X 1 1.. Pig. ::. a, l>. 

 Oedogoiiinm horisiamiiii (Le. Cl.) Wittr. Disp. < >edog. B tec. 132. 

 Prolifera borisiana Le Clebo. Sur. gen. Prolifera 17.".. 



Dioecious, gynandrosporous; oogones single, or in series of 2-3, obovoid, 

 opening by a pore above the middle; oospore almost filling the oogone; 

 supporting cell swollen, more or less curved, dwarf males slight l.v can ed, 

 attached to supporting cell; vegetative cells 15 35 in diam., 3 5 times 

 longer, supporting cells 30 12 . - J 3 times Longer; oogone \'< 50x60 

 oospore, 45-60x40 75 u; stipe of dwarf males, L5 20x45 v " ; Bperm cells 

 8-10x12-20 //. 



In streams, Lincoln. Very variable, bul easily distinguished by the I 

 bent, supporting cell. l'l. XXII.. Pig 5. 



Ocdo«oniiim delicatnm Kuetz. Pbyo. Gener. 254. L843. 



Pale; attached by a discoid base; vegetative cells cylindrical, 6 6 I 



often 4 or more times as long; oogone single, globose, inflated; both ends 



somewhat produced. 17 18x20 . oospore globose, 12 II ■ in diam. 

 In flowing water, Lincoln. 



