204 



RESEARCHES ON FUNGI 



3. Pilobolus roridus (Bolt.) Pers. Syn. meth. p. 118 (1801). 

 Coemans, Monographie, pp. 61-2, pi. 2, f. B. (copied from 



Bolton). VanTiegh. Nouv. 

 Eech. Nat. in Ann. Sci. 

 ser. 6, vol. i, pp. 46-50, 

 pi. 1, f. 7-13. Grove, 

 Pilobolidae, p. 336. Sacc. 

 Syll. vii. 185. Palla, I.e. 

 p. 398. 



Mucor roridus Bolton, 

 Fung. Halif. vol. iii, 

 pi. 132, f. 4(1789). 



Pilobolus microsporus 

 Klein, Zur Kennlniss 

 des Pilob. in Jahrb. f. 

 wiss. Bot. vol. viii, 

 p. 360, pi. 27, 28, f. 53-67 

 (1872). 



Not P. roridus of 

 Brefeld, or of Currey, 

 or of many others. 



Sporangiophore 1-2 cm. 

 high, nearly colourless, 

 the trophocyst often 

 intercalary between two 

 (or even three) mycelial 

 swellings. Subsporangial 

 swelling oval or almost 

 globose, up to 600 or 700 (x 

 diam. Sporangium very 

 much less in diameter, 

 even as little as 200 \x ; 

 columella flatly convex or 



conical, tinged with bluish-black ; spores ellipsoid, nearly colourless, 



6-8 X 3-4 IX (van T.). 



On dung of herbivorous animals, including rabbits. Not 



common. Distribution uncertain. 



This species shows generally much less of the yellow colour 



Fig. 101. — Pilobolus roridus (Bolt.) Pers. A, 

 three fruit-bodies. B, whole fruit-body, 

 shortened. CjUj^per part of fruit-body after 

 sporangium has dehisced in water ; m, 

 mucilage. D, spores. E, germinating spore. 

 F, two basal swellings, a and b, inserted 

 successively on the same apophysis c. G , an 

 intercalary basal swelling a formed between 

 two apophyses, c and c'. Copied by A. H. R. 

 BuUer from van Tieghem's Nouvelles 

 Recherches. Magnification : A, natural size ; 

 B, 25 ; C, (55 ; D and E, 380 ; F and G, 50. 



