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2. populina, Lév. On Populus nujra.
3. Tremulffi, Tul. On Populus tremula.
4. betulina, Pesm. On birch.
5. salicina. Lèv. On sallow.
164. LECYTHEA, Lèv.
Stroina surrounded or sprinkled with elongated abortive
spores. Spores free, invested with their mother-cell, or concatenate.
* Spores free.
1. Rubomm, Lèv. On brambles.
2. Rosse, Lèv. On rose.
3. populina, Lèv. On poplar.
4. Euphorbise, Lèv. On spurge.
B. epitea, Lèv. On willows.
6. mixta, Lèv. On willows.
7. saliceti. Lèv. On willows.
8. Baryi, P. {no. 755). On grass.
9. Valeriana, B. Ou Valeriana officinalis.
** Spores invested with another cell (Physonema, Lèv.).
10. gyrosa. Lèv. On raspberry.
*** Spores concatenate (Podosporium, Lèv.).
11. caprseamm, Le». On sallow.
12. Lini, Lèv. On Linwm catharticum.
165. CYSTOPUS, Lèv.
Receptacle consisting of thick branched threads. Spores
concatenate, at length separating.
1. eandidus. Lèv.; Grev. t. 251. On Capsella, Sisymbrium, etc.
166. POLYCYSTIS, Lèv.
Spores irregular, consisting of several cells.
1. Colchici, Tul. ( « 0 .4 8 5 ) . On colchiciun.
2. Yiolse, B. and Br. {no. 487). On violet.
3. parallela, B. and Br. {no. 4 8 6 ) . Ou rye, etc.
167. TILLETIA, Tul.
Spores spherical, springing from delicate branched threads.
Epispore reticulated.
1. Caries, Tul. On gvains of wheat, etc.
168. USTILAGO, Lk.
Plant deeply seated. Spores simple, springing from delicate
threads, or produced in the form of closely packed cells,
which ultimately break up into a powdery mass.
1. segetum, Pittm. On seeds of cereals and other Gramínea.
2. urceolorum, Tul. On seeds of Carices.
3. longissima, Tul. On leaves of Poa aquatica.
4. olivácea. Tul. On seeds of Carices.
5. hypodytes, Pr. {no. 481). On stems of various grasses.
6. Maydis, Cd. On stems, etc., of Indian corn.
7. Montagnei, Tul. {no. 479). On seeds of Bhyncospora alba.
8. typhoides, B. and Br. {no. 480). On stems of reeds.
9. Salveii, B. and Br. {no. 482). On leaves of Pactylis glomerata.
10. graminica, B. and Br. {no. 483). On stems of Aira aquatica.
11. vinosa, Tul. {no. 484). On seeds of Oxyria reniformis.
12. utriculosa, Tul. On seeds of Polygona.
13. fiosculorum, Tul. On flowers of scabious.
14. receptaculorum, Pr. On receptacles of goatsbeard.
15. antheramm, Tul. On anthers of Silene.
169. TUBUECINIA, Fr.
Plant deeply seated. Spores multicellular, subglobose, or
conchiform. Allied to
il
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