1917I FITZPATRICK—RHIZINA UNDULATA 295 



14. DlJRAXD, E. J 



6:387-477. pis. 5-22. 1908. 



Annales Mycologici 



15. Fraser, H. C. I., On the sexuality and development of the ascocarp in 

 Lachnea stercorea. Ann. Botany 21:349-360. 1907. 



16. Fries, Elias, Observations mycologicae 1:161-162. 1815. 



17. , Systema mycologicum 2:33. 1822. 



18. Harper, R. A., Sexual reproduction in Pyronema confluens and the mor- 

 phology of the ascocarp. Ann. Botany 14:321-400. pis. ig-21. 1900. 



19. Hartig, R., Untersuchungen uber Rhizina undulata. Bot. Centralbl. 

 45:237-238. 1891. 



20. , Rhizina undulata Fr. Der Wurzeischwamm. Forst. Naturw. 



21. 



Zeitschr. 1:291-297. 1892. 



, Text-book of the diseases of trees. Transl. by W 



figs 



22. Hoxe, Daisy S., Minnesota Helvellineae. Minn. Bot. Studies 3:309-321. 

 pis. 48-52. 1904. 



23. Lagarde, J., Contribution a Petude des Discomycetes charnus. 



Annales 



figs 



24. Massee, G., A monograph of the Geoglossaceae. Ann. Botany 11:225- 

 306. pis. 12, 13. 1897. 



25. McCubbix, W. A., Development of the Helvellineae. I. Helvetia elastica. 



Bot. Gaz. 49:195-206. pis. 14-16. 1910. 



26. Schaeffer, I. Ch., Fungorum Bavariae et Palatinatus Icones. pi. 153. 

 1800. 



27. Schroter, J., Helvellineae, Pezizineae; in Engler and Pkanttl's Die 

 natiirlichen Pflanzenfamilien i 1 : 162-243. 1894. 



28. Tubeuf, Karl von, Diseases of plants induced by crytogamic parasites. 

 Eng. ed. by W. G. Smith. London. 1897 (pp. 272-274. figs. 144-147). 



29. Underwood, L. M., On the distribution of the North American Hel- 



vellales. Minn. Bot. Studies 1:483-500. 1896. 



30. 



4:93-96. pi. 8. 1915. 



Rhizina inflate* J 



EXPLANATION OF PLATES XVII AND XVIII 



undulata 



shape 



white margin on both young and old plants, and tendency for adjacent fruit 



bod 



/ — — — — — — — — — — f-j — i -- 



show lighter colored, lower surface and dense clusters of stout rhizoids which 

 serve to attach the fruit body to substratum. 



Fig. 2.— Median longitudinal section through a very young ascocarp 

 primofdium, X40; note pine rootlets in section at side and base. 



Fig. 3.— Median longitudinal section through a somewhat older fruit 

 body, X40; deep-staining body at periphery above is fragment of section 



