MiCROSPHAERA 133 



sometimes 110-13-5 //, cells i o- 1 5 />« wide, rarely i$-iS /Jt; ap- 

 pendages very variable in number and length, 4-26, }i-2l4 times 



the diameter of the perithecium, usually about 1 }^ times diameter, 

 more or less rigid, colorless throughout or amber-brown at base, 

 or rarely colored to the commencement of the apical branching, 

 smooth, or occasionally rough toward the base, which usually be- 

 comes thick-walled, aseptate or occasionally 1-2-septatc toward 

 the base, apex variously but always more or less closely, ;^—6 

 times dichotomously 'branched, tips of ultimate branches regularly 

 ■and distinctly recurved; asci ^-S, ovate to ovate globose, 42-70 

 X 3 2-50 /i, usually but not always shortly stalked ; spores 4-8, 



18-23 X IO-I2/i. 



Hosts. — Ahius ghitinosa^ A, incana and var. vircsccns, A. inar- 

 itiina^ A. rubra, A, scrrulata^ A, viridis, Apios tubcrosa^ Astragalus 

 adsurgeus {60), Bctula alba, B. lenta, B. Intca, B, puuiila (60) 

 (97), Carpinus Amcricaiia (60), Carya alba, C, sulcata, Castanca 

 dcntata (249), C, sativa and vars. Americana d,nd Japouica, Ccano- 

 tlms Anicricaiius, Cclastrus scaudcus (66), CcpJialantlius occidcutaliSy 

 Corjius altcrnifoUa, C. Ainomiui (60), C. viacrophylla, C, stolo- 

 nifcra (363), Corylus Americana, C, rostrata and var. Mandshurica, 

 Etionymus atropurpnrcus, Fagns atropunicca (249), F. fcrruguiea, 

 Forestiera acuminata, Glcditschia triacanthos, Gymnocladus sp., 

 Ilex dccidua, L mollis (371), / vcrtieillata {97), J^fgl^^^^^ cincrca, J- 

 nigra, Lathy rus ochrolcucus, Fpalustris (61), F pratensis, Z. vcno- 

 sns, Ligustrum medium, Loniccra flava, F glauca, F glauccscens, 

 L. hirsuta {66), L. invohicrata, L. oblongifolia, L. parviflora, L. scm- 

 pcrivircns, L. Stdlivantii (6o), Lyonia paniciilata (60), Memspermum 

 Canadcnsc, Ncmopanthns fasciadajis, Ostrya Virginica, Picrasina 

 qiiassioidcs, Platanus occidcntalis, Qucrciis alba, Q. aquatica, Q. bi- 

 color, Q. bicolor x macrocarpa, Q. bicolor X Michauxii, Q. Caksbaci, 

 Q. coccinca and var. tinctoria, Q. crispida, Q. dcntata, Q. falcata, 

 Q. hnbricaria, Q. lyraia, Q. macrocarpa, Q. nigra, Q. obtnsdoba, 

 Q. PhcUos, Q. Prinus, Q. Robur, Q. rubra, Rhamnus cathartica, 

 Rhododcndrcvt nudijlorum, Sambucus Canadensis (122), (265), 

 ScJdzandra Chincnsis, Syringa Amurcnsis, var. Japonica, S. Pcrsica 

 (269), 5. vidgaris, Tccoma radicans, Ulniiis Americana, Vaccinium 

 coryuibosiun. Viburnum accrifolium, V. dcntatum, V. Lantana, V. 

 Lcntago, V. Opnius, V. prunifolium, V. pubesccns, V. Tin us (246), 

 J^cia Americana and var. linearis, Zelkova acuminata {Popidus 

 grandidentata'] . 



