464 Bulletin 315 



side branch ends in a sporangium, again the branches of the second order 

 end thus, and again the number and order of the branching is manifold. 



Family Pilobolaceae 



Pilaira anomala (Cesati) Schroter, Schles. Krypt. Flora 3: 211. i886. 



Syn. Piloholiis anomalus Cesati, Rab. Herb. Myc. Ed. i: 1542. 1851. 

 Ascophora Cesatii Coemans, Mem. Acad. Belg. 30: 63. 1861. 

 Pilobolus viucedo Brefeld, Untersuch. i: 27. 4: 66. 1872. 

 Pilaira Cesatii van Tiegh. Ann. Sci. Nat., Bot. Ser. i: 51. 1875. 

 Pilaira Cesatii Bainier, Etude, 29. 1882. 

 Pilaira Cesatii Grove, Midland Nat. 1884: 37. 

 Pilaira anomala Berlese & de Toni, Sacc. Syll. Fung. 7: 188. 1888. 



Sporangiophores at first erect but soon falling and forming over the 

 whole substratum a high, loose, hyaline, woolly, interwoven mass, usually 

 10-12 cm. long but even attaining 20 cm., cylindrical, 30-80^1 thick, with- 

 out basal and subsporangial swelling, with colorless, thin, slightly wavy 

 membrane, at the time of maturity of spores without contents. vSpo- 

 rangium at first white, then becoming yellow and finally at maturity black, 

 with colorless base, when moist globose, 100-250JU in diameter, when dry 

 half -globose, many-spored; columella ioo-150/Lt broad by 40-60JU high, 

 depressed half-globose or knot-like, smooth, colorless; spores long oval, 

 8-13 by 5-8/x, solitary, hyaline, in mass yellowish, with colorless thin 

 smooth membrane; zygospores at maturity black, round or slightly oval, 

 120/X long by loo/i broad, with smooth thick colorless endospore and black 

 warty epispore, germination with short sporangiophore. 



Hab. Isolated from forest soil, Holland, Koning. 



Family Mortierellaceae 



Mortierella subtilissima Oud., Contrib. Fl. Myc. des Pays-Bas ser. 2, 

 19: 876. 1901; Arch. Neerl. Sci. Nat. ser. 2, 7: 277-278. pi. 4, figs, 

 i-j. 1902. Lendner, Les Mucorinees de la Suisse, 156. 1908. 



Colonies similar to M. pusilla, vegetative hyphse, hyaline, continuous, 

 branched, 3-5/x thick, with homogenous protoplasm; fertile hypha? strict, 

 continuous, hyaline, 130-200/^ thick, simple, cylindrical, not thickened 

 downward nor hardly attenuate upward, ending singly in sporangia; 

 sporangia globose, smooth, 20-3 Oju in diameter, membrane hyaline; spores 

 smooth, hyaline, 2.3-4.6/i in diameter, commingled with elliptical ones 

 5-6 by 4-5/x. 



Hab. Isolated from humous soil from Spanderswoud near Bussum, 

 Holland, March, 1901, Koning. 



Differs from M. pusilla in vegetative hyphffi having homogenous, never 

 granulate, protoplasm; in the slender conidiophores (2.3-3.5 against 5m) 

 being equally thick their entire length; in the sporangia being smaller 



