1922] 



PFEIFFER MONOGRAPH OF THE ISOETACEAE 



217 



Page 

 echinospora var. Braunii forma 



Boottii 157 



echinospora var. Braunii forma 



robusta 173 



echinospora Brittoni 157 



echinospora var. Flettii 186 



echinospora var. maritima 174 



echinospora var. muricata 157 



echinospora var. robusta 173 



echinospora var. truncata 175 



edulis 208 



elatior 126 



Engelmanni 201, 232 



Engelmauni var. caroliniana_207, 232 



Engelmanni var. fontana 201 



Engelmanni var. gracilis 201 



Engelmanni var. valida 201 



flaecida 136, 226 



flaccida var. alata 137, 226 



flaecida var. Chapmani 136 



flaccida var. rigida 136 



Flettii 186, 230 



foveolata 200 232 



Gardneriana ' 126 



Gravesii 173 



Gunnii 124 224 



Harveyi ' 192 



Heldreichii 109 



heterospora 192 



liieroglyphica 194 



histrix 128, 224 



Matrix forma desquamata 129 



histrix forma subinermis 129 



histrix var. scutellata 129 



HooTccri 134 



Howellii 139 228 



Howellii var. minima _' 142 



humilior 134 



japonica 208 



Karstenii 138 



Kirkii ._123 222 



lacustris 186' 230 



lacustris 124^ 192 



lacustris var. paupercula 189 



Lechleri 138 



leiospora 186 



ligustica _ 209 



lineolata 115 



lithophila 135, 226 



longissima 120 



Macounii 174 



macrospora 192 232 



macrospora var. heterospora 192 



macrospora forma hieror*lyphica 



194, 232 



Malinverniana H3 } 218 



maritima ' 174 



Martii _ 200 



mclanopoda _149 228 



melnnopoda var. calif ornica _' 139 



melanopoda var. pallida 149 



melanospora 134 226 



Page 

 mexicana _______________ _ 147 228 



minima ___________ ' 



Montesumae _______________ 147 



Muelleri _________________ 127 



muricata ____________ ^57 



natalensis ______________ 210 



neoguineensis _______________ 211 



nigritiana _________________ 



nuda ___________________ 



Nuttallii ------------------ i3o ; 224 



Nuttallii var. Orcuttii _______ ' 132 



occidentalis _______________ 139 230 



occidentalis var. Piperi ________ '. 190 



olympica ____________________ ng 



opaca ----------------------- 130 



Orcuttii ------------------- i32 ; 224 



ovata . ------------------- 108, 218 



paupercula ___________________ 199 



Perralderiana ___________ 121 



phaeospora ________ _ 175 



Piperi ------------- -IIIIIII" 190 



Prmglei ----------------- 185 2 30 



pygmaea ____________________ 143 



riparia ------------------ 181> gso 



nparia var. canadensis _____ 184, 230 



saccharata _______________ 179^ 230 



saccharata var. Palmeri _______ ' 179 



saccharata var. reticulata ______ 179 



Savatieri ___________ 177 



Schweinfurthii ____________ 1Q7 218 



setacea ------------------ no' 218 



setacea var. Delilei ___________ 119 



setacea var. Perreymondii ______ 115 



soda ------------------------ 138 



Stuartii _________________ 134. 



Sulcsdorfii ____________ 139 



tasmanica __________ 127 



tegulensis ---------------- 121, 222 



tenuis'sima _____________ ,_117 220 



tenuissima ___________ ' 127 



Tiguliana ______________ 121 



tridentata _____________ . 209 



tripus ----------------- !_!___ 176 



triquetra -------------------- 133 



truncata ----------------- 175, 230 



Tuckermani -------------- 195^ 234 



TucJcermani var. borealis ______ 195 



Tuckermani var. Harveyi ______ 192 



Tuckermani var. heterospora ___ 192 

 Tuerckheimii ___________ _ 147 228 



Underwoodi _____________ ' 139 



valida ------------------- 177 201 



valida var. Gravesii ________ 173 



velata ------------------- n 9) 222 



valata forma longissima _______ 120 



velata var. longissima _______ 120 



velata var. Perralderiana ____ 121, 222 



VioHaei __________________ 117 



Welwitschii ________________ 106 



Worrnaldii _______________ _ 208 



Marsilea __________________ ' 104 



Subularia _____________ 104 



