Index 



subterrancnn organs of, 42; 



active period, 40-52; dormant 



period, o2-57; toratological forms 



of, 09-100. 

 cernuum, 77. 

 chloropctalum, 7. 

 erectum, 73-74. 

 erythrocarpum, 52. 

 grandiriorum, 4, 7, 10, 25, 40, 52, 



54, 55, 50, 59, 70-73, jfassim. 

 nivale, 4, 16, 71, 77. 

 ovatum, 1, 3, 4; lack of color vari- 

 ation in, 5; viable seeds in, 12, 



14, 15, 33; contrasted with T. 

 sessile var. giganteum, 12, 14- 



15, 33, 42, 43, 45, 46, 49, 51, 57, 

 59; undeveloped flowers in, 28; 

 teratological variations in, 77- 

 78. 



recurvatum, 40, 77. 



sessile, teratological variations in, 

 75. 



var. angustipetalum, 6. 

 var. giganteum, color variation 

 in, 1, 7-10, fig. opp. 20; habi- 

 tat, 2^, fig. opp. 18; com- 

 parison with eastern form, 

 5; size variation in, 5-6, fig. 

 opp. 20, with reference to 

 gigantism, 7 ; experimental 

 culture, rootstocks, 10-11, 

 42, 43, 46, 49-51, figs. opp. 

 62; grafts, 14; seeds, 14, fig. 

 opp. 24; sterility, 11-12, 33; 

 vegetative propagation, 14- 



15, 46, fig. opp. 22, 88; tera- 

 tological variations in, 15— 



16, 77-82, figs. opp. 90-100; 

 undeveloped flowers in, 25, 

 32, 33, figs. opp. 36, 38; 

 growth of roots of, 43; con- 

 traction of, 43 ; crown, 44- 

 45; offsets, 46; growth above 

 ground: leaves, 46, flower, 

 47^8, fruit, 48, dehiscence 

 of, 47, 48; dormant period 

 of, 52, 58; pollen, cutting off 

 of, 52, sporogenous tissues, 

 52; resting stage, 53; synap- 

 sis, 53, 54, 58, fig. opp. 64 ; 

 chromosomes during meta- 

 phase, 54; tetrads, 55; tape- 



turn, 55; development of 

 ovules, 56 ; mogasporo mother- 

 cell, 56, 58, figs. opp. 62, 66, 

 68. 

 undulatum, 76-77, 83. 



Tsigupi, Paiute for Chrysothamnus, 

 191. 



Tsuga heterophylla (western hem- 

 lock), host for Schizophyllum, 

 46.5. 



Ulva angusta, 283, fig. opp. 316, 324. 

 aureola, 280. 

 californiea, 283. 

 dactylifera, 285-286, 287, fig. opp. 



314. 

 expansa, 284-285. 

 fasciata, 284, 285, 286, 287. 

 fenestrata, 285. 

 fulvescens, 280. 

 Lactuca, 286. 

 latissima, 284. 

 lobata, 284. 

 noniatoidea, 286. 



stenophylla, 282, figs. opp. 314, 320. 

 taeniata, 285, 286-287, pi. opp. 318. 

 vexata, 282-283, fig. opp. 206. 

 Ulvella, 295. 



Umbellularia californiea (California 



baytree), host for Schizophyllum, 



449, 458, 459, 465, 470, figs. opp. 



488, 498. 



Undescribed. Plants Mostly from 



Baja California, 437-446. 

 Urcdinales, of California, preliminary 

 list of, 101-157; morphology of, 

 104-105; index to species of, 

 151-154; index to host plants, 

 154-157. 

 Urospora crassa, 279. 

 Hartzii, 279. 

 incrassata, 279. 

 Uvularia sessilifolia, 41. 

 Viguiera pauciflora, 331. 

 Viscainoa geniculata var. pinnata, 



439. 

 Wooton and Standley, cited, 209. 

 Xyleborus dispar, shot hole borer, 



agent in fungus attack, 470. 

 Zostera, host for Monostroma, 281. 

 Zygomitus, 294. 



EREATA 



Page 277, line 14 from bottom. For Guiterrezia read Gutierrezia. 

 Page 443, line 6 from bottom. Bead: "cystocarpiis et spermatangiis in hieme, 

 cum tetrasporangiis in hieme et vere lecta." 



[506] 



