MUCEDINES. 349 



], on the tips of tlic branchlet ; 2, large, globose, on the 

 creeping spawn. {Artotroyus, ]VIont.) 



1. parasitica, Cil. ; Sow. t. 400. /. 7. On Cruciferce. 



2. destructor, Casp. (no. 239, toUk a Jiff.). On leaves of onions. 



'6. infestans, Casp. (no. 521). On potatoes, producing the well-known 

 potato murrain. 



4. ganglioniformis, Casp. {no. 526). On lettuces. 



5. arborescens, Casp. {no. 525). On poppy. 



6. Yiciae, Casp. {no. 524). On peas, tares, etc. 



7. Ui-ticae, Casp. {no. 522). On nettles. 



8. Arenariae, Casp. {no. 523). On Arenaria trinervis. 



9. macrospoi-a, Casp. {no. 537). Botrytis crustosa, i^/-. On Umbellifers. 



10. grisea, Unger{7io.h2%). On Veronica Beccahunga. 



11. effusa, Casp. On spinach. 



12. violacca, B. On petals of Scabiosa arvensis. 



13. curta, Casp. {no. 12S,iviik a Jig.). On anemone. 



212. VERTICILLIUM, Lk. 



Flocci septate, hyaline or eoloured. Branches verticillate. 

 Spores apical. 



1. apicale, B. and Br. {no. 531, ?cUk a fig?}. On fallen oak-branches. 



2. nanum, B. and Br. {no. 532, with a fig). On pears. 



3. epimyces, B. and Br. {no. 533, with a fig.). On Elaphomyces. 



4. distans, B. and Br. {no. 534, with a fig.). On dead herbaceous stems. 

 V. lateritium appears to be only a condition of Acrosta- 



213. HAPLARIA, Lk. 



Flocci simple or forked, jointed. Spores scattered over the 

 tips of the threads. 

 1. grisea, Lk. On decaying herbs. 



