NOTICES OF NORTH AMERICAN FUNGI. 105 



* Helminthosporium pyrorum. Desm. — Spiloccea Pomi, Fr. Cla- 

 dosporium dendriticum, Walli-. 



On apples. No. 5935. On apple leaves. Canada, Poe. No. 

 6135. On pear leaves. Car, Inf. Ravenel. No. 3084. 



641. Dzepanispora pannosa. B. 4' C. — Pannosa, floccis flexuosis, 

 Mc illic processibus brevibus fertilibus praeditis ; sporis longissimis 

 insigniter falcatis pluriseptatis. 



Forming a cloth-like stratum on the cut surface of stumps. Car. 

 Inf. No. 2354. 



Mycehnm creeping, sending off flexnous articulated flocci, which 

 bear two or three short fertile processes above ; spores very long, 

 much carved, multiseptate. 



* Maczosporium cheiranthi. Fr. — On Prunus Caroliniensis. 

 Car, Inf. No. 1173. On turnip leaves. No. 2389. On Capsicum, 

 No. 2798. On Sterculia j)latanoides. No. 2603. On Castanea, 

 3378. New York, Sartwell. No. 1797. On some herbaceous 

 plant. No. 2646. On rose. Car. Inf. Ravenel. No. 1371. 

 Alabama, Beaumont. No. 4624. Car. Sup. No. 513. On pea 

 pods. No. 212. On Capsicum. No. 868. On Phylolacca, Vir- 

 ginian Mountains. No. 3361. Rhus glabra, No. 3295, 



Var. Circinans, B. ^' C, in maculas pallidas orbiculares cir- 

 cinans. 



On cabbage leaves. Car. Inf. No. 2461. Growing in a cir- 

 cinate manner on orbicular pallid spots. There is a little difference 

 in the spores, but scarcely sufficient to be considered specific. 



Var. Echinellum, B, ^ C., punctiforme floccis radiantibus, 

 sporis angustis. 



On leaves of Platanus occidentalis. Ravenel. No. 1762. Form- 

 ing little echinulate specks ; spores narrow. 



642. nflacrospozium antennaefozme. B. 4' C. — Floccis brevibus, 

 sporis torulosis elongatis deorsum attenuatis pluriseptatis. 



On leaves of Celtis. Alabama, Peters. No. 4873. 



Threads short, sometimes acute, sometimes dilated at the apex 

 and fertile ; spores attenuated below, elongated above, 12-18 

 septate torulose ; occasionally they are shorter, more obtuse, with 

 a few vertical septa. Two spores are sometimes formed at the two 

 angles of the wedge-shaped terminal joint. 



643. Macrospozium stilbospozoideum. B. <& C. — Floccis brevis- 

 simis, quaudoque obsoletis ; sporis obovatis fenestratis. 



On leaves of Cratcegus. Alabama, Beaumont. No. 4654. 



Mycelium creeping ; fertile branches very short or obsolete ; 

 spores obovate, with about three transverse and several vertical 

 divisions, resembling those of Steganospora, Cd., -OOl-'OOlS long, 

 about two-thirds as much broad, with a short pedicel. 



644. Mystzospozium Cuztisii. B. — Sporis doliiformibus plurisep- 

 tatis verticaliter divisis ; pedicellis hyalinis elongatis ; floccis acutis 

 intermixtis. 



