185. 
185. 
187. 
187. 
187. 
187. 
187. 
189. 
189. 
191. 
191. 
191. 
193. 
193. 
195. 
195. 
197. 
ii 
197. 
199. 
£99; 
oe 
199. 
201. 
201. 
201. 
201. 
OEDOGONIUM 61 
184. Oogonium with mammiform projections.....118. Oe. mammiferum 
184. Oogonium with conically obtuse projections...................... 185 
184. Oogonium with projections intermediate between the two above, 
117a. Oe. itzigsohnii £. heteromorphum 
Diameter of vegetative cell 5-7u...... 117b. Oe. itzigsohnii var. minus 
Diameter of vegetative cell 8-l0y.......0......... 117. Oe. itzigsohnii 
DIOECIOUS, NANNANDROUS, WITH CYLINDRICAL VEGETATIVE CELLS. 
she Ooaronium openins bya pare penne ce. bee oe bons ot SS ER Pad. 187 
[Sie Oosonrum Gpenino byeagliGun see. te wicee te nae he eee. 228 
Pore median, or alittlejabowemedian Sivek. ace baton eo ws. 188 
Pore inframedian.....................128a. Oe. hystrix var. canadense 
BOWE Soharesia lad ei al gmeg so as peck oot a Oe ene ee ee 2 201 
BREESE CITOEIES tr MPO Cone toe ee ey at ae ee hs AN yet Bene 202 
IER SULbe ChE, ae a BG ee ce eles Lo A Oa ak ae ne Aaee Pe 226 
Tey ali GOSNOTE, CChina Lela. .s0ke haath Beebe te) «bales HAs ek 189 
188s Walliotoospore punctate... ..4s45..a5s5+s-- 120. Oc. nebraskense 
[SS Vi aol Oospore spirally ribbed? 2: c.cchs betes Senin a sn cake es 194 
Peace Wotlk OhroGsporeySmMOOtliazd . \ts eat. Mer ees fs Shere rset ea hoes os 197 
Spines more than 5u in length......... 124a. Oe. echinospermum var. horridum 
SrmesMessnbacanenupimmlen ora Nen uk Aes. kl ce deny AM ee oe os 190 
OU oulmaltory eel lentarsed seus. sn ctas s oh 122. Oe. hystricinum 
190. Suffultory cell not or very slightly enlarged...................... 191 
Diameter of vegetative cell 7-l3yu................. 121. Oe. aster 
Diameter of vegetative cell 12-l6u................ 125. Oe. pungens 
Diameter cmverctative.cell 17-30w... 0) 26 2. Shoe bw he ee ne ds 192 
192. Diameter of oogonium 36-38u...123b. Oe. hystrix var. subglobosum 
192 eDiametenohoozonitim, s8-O0uls. 2.2 ...4) 8 ee ee 193 
WesporemIGOOSGwees ee bac ee eS. oo ED Oe 124. Oe. echinospermum 
@aspucetellipsoides a-hole red nwiatee desc 123. Oe. hystrix 
eee nil bomvece lvenlaneed’ -)2) je... eet ocr ak FUR ees Os 195 
aS oil corvecell motenlareed. 4 0)... 4 1 debies aeOee eee ae 196 
Oogonium 40-44y in diameter..................... 126. Oe. exospirale 
Oogonium)ds1—60e imidiameter .2...,...2.....25.5: 127. Oe. illinoisense 
196. Diameter of oospore 37-45u..... 128a. Oe. spirale var. acutum 
196. Diameter of oospore 46-56u................. 128. Oe. spirale 
WEcpoie aos uo subslo Waser = ..).2 221... Sal Sea eek ea. 198 
Oppo re semaaotlar-ellipsoid ty en cc.! pe erties, De ee Ee 200 
Waspake votes .. i515 552). NoRs. OS 132b. Oe. braunii var. zehneri 
198. Vegetative cell 8-9u in diameter............ 129. Oe. depressum 
198. Vegetative cell 9-12u in diameter........... 130. Oc. semiapertum 
IGS we Vieretative, cell 2-23 nam diameter... ..d1.0. s4eeesees cos sks. o- 199 
Diameter of oogonium 23-30p......... 132a. Oe. braunii var. hafniense 
Diameter of oogonium 30=37w..)..........---...<- 132. Oe. brauni 
Diameter of oogonium 43-48y...............5..... 131. Oe. gallicum 
Daameter of oogontum 49-52p-... ee ea ood 133. Oe. flavescens 
200. Diameter of oogonium 19-30y...135a. Oe. sexangulare var. angulosum 
200. Diameter of oogonium 29-33u......0........ 135. Oc. sexangulare 
200. Diameter of oogonium 36—42u...135b. Oe. sexangulare var. majus 
Masporeqvall punctate. .-)55.92-54 secs. ae ee. 120. Oe. nebraskense 
Oospore wall spirally ribbed..........128b. Oe. spirale var. latviense 
@aspore wall smooths. o.oo. se oa ot 143a. Oe. multisporum var. magnum 
Mocmoareawell COMINAte, AG... bons ead paelea eae 134. Oe. manschuricum 
rete DOLE WAMU STOOGES er). o..04 sola osie a RI k ba as ok ben 203 
me Oospore walbdentates. 6 ois. 5.5 ea 136. Oc. stellatum f 
202. Oospore wall spirally ribbed... .128b. Oe. spirale var. latviense 
“ese AQESICU TENE UL arse) niiha ar (aie ena eres ea Sennen Le we gt aed ee ae 215 
02. Oospore wall jengitudanally ribbed... :2.. 6080. Wave os ho.. one 218 
Pee SOLE Wa lnplnbeGnot oe tr ier te ae eRe On oe oes”: 225 
*See footnote, page 53. 
