Volva, a wrapper or envelope, which in the young stage completely surrounds the plant, same as universal veil. At maturity of the plant it may be left in the form of a cup at the base of the stem, or broken up into fragments and distributed over the cap and base of the stem. FOOTNOTES: [F] The sub-class Ascomycetes includes the morels, helvellas, cup fungi, etc., and many microscopic forms, in which the spores are borne inside a club-shaped body, the ascus. Only a few of the genera are described in this book, and the technical diagnosis will be omitted. See page 216. [G] One American species in Texas. INDEX OF GENERA, AND ILLUSTRATIONS. NOTE.--In this index the generic and specific names have been divided into syllables, and the place of the primary accent has been indicated, with the single object of securing a uniform pronunciation in accordance with the established rules of English orthoepy. Agaricus (A-gar'i-cus), 18--26. arvensis (ar-ven'sis), 21, fig. 18. campestris (cam-pes'tris), 1--9, 18, figs. 1--7, 12. comtulus (com'tu-lus), 24, fig. 24. cretaceus (cre-ta'ce-us), 79. diminutivus (di-min-u-ti'vus), 26. echinatus (ech-i-na'tus), 158. fabaceus (fa-ba'ce-us), 23. maritimus (ma-rit'i-mus), 142. placomyces (pla-com'y-ces), 23, pl. 4, 5, figs. 21, 22, 23. rodmani (rod'ma-ni), 20, fig. 17. silvaticus (sil-vat'i-cus), 23. silvicola (sil-vic'o-la), 20, figs. 19, 20. subrufescens (sub-ru-fes'cens), 23. Amanita (Am-a-ni'ta), 52. cæsarea (cæ'-sa're-a), 70, pls. 18, 19, fig. 72. cothurnata (coth-ur-na'ta), 66 69, pl. 17, figs. 68--70. floccocephala (floc-co-ceph'a-la), 62, fig. 63. frostiana (fros-ti-a'na), 54, 55, 67, pl. 1. mappa (map'pa), 58. muscaria (mus-ca'ri-a), 52--54, pls. 1, 12, 13, figs. 52--54. pantherina (pan-the-ri'na), 69. phalloides (phal-loi'des), 3, 14, 55--61, 78, pl. 14, figs. 55--58. polypyramis (pol-y-pyr'a-mis), 74. rubescens (ru-bes'cens), 71, 72, pls. 19, 20, figs. 73, 74. spreta (spre'ta), 69, 70, fig. 71. solitaria (sol-i-ta'ri-a), 72--74, pls. 21, 22, figs. 75, 76. strobiliformis (strob-i-li-for'mis), 73. velatipes (ve-lat'i-pes), 63--66, pls. 15, 16, figs. 64--67. verna (ver'na), 60, 61, 78, figs. 59--61. virosa (vi-ro'sa), 61, 62, fig. 62. Amanitopsis (A-man-i-top'sis), 74. farinosa (far-i-no'sa), 76, 77, fig. 78. livida (liv'i-da), 75. nivalis (ni-va'lis), 76. spadicea (spa-dic'e-a), 75. vaginata (vag-i-na'ta), 74--76, pl. 23, fig. 77. volvata (vol-va'ta), 76. Armillaria (Ar-mil-la'ri-a), 83. aurantia (au-ran'ti-a), 84--86, fig. 86. mellea (mel'le-a), 83, 84, pl. 27, fig. 85. Annularia lævis (An-nu-la'ri læ'vis), 78. Ascomycetes (As-co-my-ce'tes), 216. Basidiomycetes (Ba-sid-i-o-my-ce'tes), 260. Black-spored agarics, 32.