100 NOTICES OF NORTH AMERICAN FUNGI. 



avium. Pennsylvania, Michener. No. 3537, 4186. Maine, E. S. 

 Morse. No. 5440. 



465. IHicropera rubida. B. $ C. — Transversim erumpens, rubida ; 

 sporis filiforniibus longissimis. On cherry. Pennsylvania, Michener. 

 No. 3934. 



Bursting transversely through the bark, reddish within and 

 without ; spores thread-shaped, very long, the endochrome here 

 and there interrupted. 



* Discella caxbonacea. B. $ Br.— On willow twigs. Maine. 

 Rev. J. Blake. No. 6304. 



466. Discella effusa. B. $ B.— Pustulis punctiformibus stratum 

 nigrum efformantibns ; sporis oblongis, angustis. On decaying 

 apples. Pennsylvania, Michener. No. 3541. 



Pustules minute, crowded into black effused spots ; spores 

 oblong, -0008 long, -00016 wide, without any nucleus. 



467. Discella rugosa. B.$C. — Pustulis sparsis curvulis sub- 

 hysterii formibus ; sporis oblongis utrinque attenuatis, endochro- 

 mate utrinque retracto. On Acer rubrum. Pennsylvania, Michener. 



Pustules scattered hysteriiform, slightly curved, here and there 

 dotted with the slightly prominent ostiola; spores pedicellate, ob- 

 long, attenuated, slight at either extremity, -0005 inch long ; en- 

 dochrome retracted towards either apex; pedicel as long as the 

 spores. 



468. Discella Magnolias. B. & C— Pustulis sparsis, apice tantum 

 nudis ; sporis oblongis brevioribus. On twigs of Magnolia cordata. 

 Virginian mountains. No. 3359. 



Pustules small, covered with the cuticle, which is not discoloured, 

 except at the apex ; spores "0003 inch long, oblong, -00008 wide ; 

 pedicels as long as the spores. 



469. Discella obscura. B. ft C— Pustulis minutis depressis sparsis 

 fuscis, epidermide tectis ; sporis oblongis. On twigs of Acer stria- 

 tum. Massachusetts. No. 3395. 



Pustules minute, rather irregular, depressed, covered with the 

 transparent cuticle through which their brown tint is visible ; 

 spores oblong, 0003-'0006 long, slightly wider than in the last. 



470. Discella micxospora. B. & C— Pustulis parvis elongatis 

 depressis ; sporis brevibus subellipticis. On twigs of Ceanothus 

 Americanus. Pennsylvania, Michener. No. 3599. 



Pustules elongated, depressed, covered with the cuticle, which at 

 length becomes transparent in the centre and bursts ; spores sub- 

 elliptic, -0003 long, -00013 wide. 



* Phlyctaena vagabunda. Besm. — On stems of Phytolacca. 

 Alabama, Beaumont, No. 4656 ; spores, -0006 long. 



471. Phlyctaena axcuata. B. — Pustulis minutis, epidermide 



