52 
ENDOSPOUEvE. 
[PHYSARUM, 
or greyish-violet colour, as given by Rost., Mon., p. 120, and not 
" fusco-atra " (Sacc, Syll., p. 360). The specimen named Til. gracilenta 
from Sowerby's Herb. (K. 1419) approaches the form 8, with stout dark 
stalk. Physarum Readeri Mass., from Melbourne (K. 500), is the 
form 7, with spores 8 to 9 /x diam. The type of P. granulatum Balf. 
hi. (K. 67) is the form y, with the lime on the sporangium-wall in 
sand-like granules, a not infrequent appearance in species of Phy- 
saraceae (cf. P. compressiun). P. Muscicola Pers. is referred to by 
Persoon in Syn. Fung. 1801, p. 171, as hardly to be distinguished from 
the somewhat larger species P. nutans ; it would therefore appear to 
be a small form of variety /3. Tilmadoche Pini Rost., Mon., p. 128, is 
described as similar to P. nutans, but of erect and somewhat larger 
growth, and more robust. 
Hah. On rotten stumps, etc. — Leytonstone, Essex ; Lyme Regis, 
Dorset (L:B.M.28) ; y. France (Paris Herb.) ; a /3 y 6\ Germany and 
Poland (Strassb. Herb.) ; y. Italy (B. M. 435) ; y. Austraha (K. 500) r 
/3. Tasmania (K. 1403), New Zealand (K. 1243) ; 3 and y. N. America 
(L:B.M.28). 
20. P. calidris Lister, in Journ. Bot. 1891, p. 258, PI. 308, 
fig. 2. Plasmodium ? Total height 1 to 2 mm. Sporangia sub- 
globose, stipitate, erect or somewhat inclined, scattered, 0'5 mm. 
diam., white, rugose ; sporangium-wall membranous, colourless 
above, with dense qlusters of innate white granules ; thickened 
and persistent at the base, partaking of the colour of the stalk. 
Stalk subulate or equal, furrowed, 1 to 1 '5 mm. long, 0"1 mm. thick, 
red-brown, clear orange-brown in glycerine-jelly mounting, not 
enclosing refuse matter, or rarely, at the base. Columella none. 
Capillitium of colourless branching threads with numerous or few 
white lime-knots ; very various in the same development, either 
delicate or appi'oaching the type of Badhaviia. Spores pale 
rownish- violet, almost smooth, 8 to 11 /a diam. — Didymimn 
usillum Berk. & Curt., Grev.,ii. (1873), p. 53. Badhamia nodu- 
osa Mass., Mon., p. 322. 
Plate XIV., B. — a. sporangia, x 20 ; J. capillitium and spores, x 280 ; 
c. spore, X 600 (England). 
The specimen in Broome's Herb, named P. elejihantinum Berk. & Br. 
MS. from Ceylon (B. M. 453) is a somewhat larger form, but appears 
to be the same species, with capillitium and spores similar to those in 
the English gatherings. P. nodulosum Cooke & Balf. (B. M. 858), from 
South Carolina, differs from the English specimens of P. calidris only 
in the Badhamia-like capillitium. In the Lyme Regis gatherings this 
character is very inconstant : in one sporangium the hyaline threads 
may be abundant, either delicate or with broad expansions, and the 
lime-knots scattered ; in another the hyaline threads may be few, with 
the capillitium consisting chiefly of confluent lime-knots. In the 
sporangium examined of the Orton specimen (K. 1411) the capillitium, 
for a great part, consists of a network of broad strands more or less 
filled with lime, of Badhmnia type ; the remainder has numerous lime- 
knots connected by delicate hyaline threads. The type of Didyminm 
imsillum Berk. & Curt., from South Carolina (K. 1492), consists of 
specimens on two slips of wood, on one of which are three small 
sporangia of a Physarum with orange translucent stalks, no columella, 
