ARCYRIA 273 



in profile, the remainder either smooth or with a broken reticulation 

 or faint spirals; spores nearly smooth, 6-8 n. 



Occasional collections regarded as pinkish forms of A . cinerea agree 

 very closely with this description. The name A. carnea Schum., Enum. 

 PI. Saell. 2 : 213, 1803, was used, as noted by Miss Lister, for a form 

 which cannot now be determined. The name adopted by Miss Lister 

 is therefore a homonym, and invalid, but pending further study to 

 determine whether the form is entitled to specific recognition, it may 

 be used. 



Long Island(?) ; Europe, Manchuria, Japan. 



15. Arcyria insignis Kalch. &* Cooke 



Grev. 10 : 143. 1882. 



Sporangia gregarious or clustered, pale or bright rose, 0.5-1.5 mm. 

 in height, stipitate, ovate or cylindric; stipe short, 0.2-0.4 mm., red, 

 with spore-like cells; capillitium a close network of delicate threads 

 with a few bulbous free ends, with faint transverse bands or short 

 spinules, or sometimes nearly smooth, colorless beneath the lens; 

 spores colorless, nearly smooth, 6-8 /j,. 



Superficially resembling small forms of A. denudata, from which it 

 is distinguished by its shorter stipe and more delicate capillitium with 

 less conspicuous markings. The color, too, is different; our specimens 

 are more or less salmon colored — grenadine pink to carrot red of 

 Ridgway. 



The var. major G. List., Mycetozoa ed. 3. 236, described as larger, 

 and deeper rose, suggests certain phases of A. denudata. Brandza, 

 who finds it abundant in Moldavia, agrees with Miss Lister in placing 

 it here. 



The var. dispersa Hagelstein, Mycologia 21 : 298, 1929, is scattered 

 instead of clustered, growing on decaying beach grass. 



Rare in North America: Massachusetts, Long Island, Washington, 

 South America; Europe, Ceylon, Malay Peninsula, Japan, South and 

 West Africa, Australia. 



16. Arcyria denudata (L.) Wettstein 



Verh. Zool.-Bot. Ges. Wien 36 : 585. 1886. 

 PI. XVIII, Figs. 473, 474, 475. 



1753. Clathrus denudatus L., Spec. PI. 1179. 



1772. Mucor clathroides Scop., Flor. Cam. ed. 2. 2 : 493. 



1775. Mucor pyriformis Leers, Fl. Herborn. 288. 



1786. Embolus crocatus Batsch, Elench. Fung. Cont. 1: 265. 



1788. Stemonitis coccinea Roth, Fl. Germ. 548. 



