10 
. Erigeron acris, L. 
Tnula viscosa, Desf. 
Xanthium spinosum, L. 
Chrysanthellum procumbens, Rich. 
Heliotropium Europeum, L. 
Anchusa officinalis, L. 
Convolvulus arvensis, L. 
Solanum nigrum, L., var. villosum, Mill. 
Verbascum sinuatum, L. 
Antirrhinum Orontium, L. 
Amarantus deflexus, L. 
Amarantus Blitum, L. 
Chenopodium album, L., var. viride, Moq. 
Roubieva multifida, (L.) Moq. 
Polygonum hernariotdes, Del. 
Euphorbia Peplis, L. 
Euphorbia Peplus, L. 
Euphorbia Terracina, L. 
Mercurtalis annua, L. 
Cyperus rotundus, L. 
Cynodon Dactylon, (L.) Pers. 
Tuos. G. PORTER. 
Notes on the Development of Conidia-Bearers in Acrostalagmus, 
Corda, sp. und. 
By Conway MACMILLAN. 
(Plate CXXIII.) 
On decaying stems of Dahlia in the plant-house of the Uz 
versity of Minnesota an interesting fungus belonging to the 
‘Hyphomycetes has been observed, sometimes in abundance. It 
forms tenuous coatings of loosely woven filaments on the Dahlia 
stems, and from these coatings arise delicate, erect, jointed fila- 
ments bearing whorls of conidial-branches acropetally arrang d, 
becoming less and less mature as one passes nearer to the tip 
the erect filament. These upright hyphe are about one mi 
meter in length, and, when abundant, form little forests of conidi 
bearers (conidiatrager) upon the diaphanous mycelial netwot 
