10 NORTH AMERICAN FLORA [VOLUME 6 
Spores 1-2 & 3-44 
Spots finally one nearly half of the leaf; on Rosaceae. 251. P. fragaricola. 
Spots reaching a diameter of 1 cm. or more. 
On Rosaceae. 252. P. Dearnessit. 
On Scrophulariaceae. 253. P. verbascicola, 
Spots terminal; on Rubiaceae. 254. P. Richardsoniae. 
Spots affecting’ most or all of the leaf. 
On Fabaceae. 
On Lupinus. 255. P. ferax. 
On Asiragalus. 256. P. Astragali. 
Not on Fabaceae. 
Spots yellowish; on Adoxaceae. 257. P. Adoxae. 
Spots becoming blackish; on Cichoriaceae. 258. P. eximia. 
Spores imperfectly developed. 
m Menispermaceae. 259. P. abortiva. 
On Solanaceae. 260. P. Nicotiana. 
On Woopy Hosrs; TREES, SHRUBS, OR VINES 
Affecting trees. 
On Fagaceae. 
Spores 2 X 4 261. P. Quercus-Ilicis. 
Spores 1-1.5 X2.5- —5 Mh. 
Spores twice as long as broad; on Quercus. 262. P. vesicatoria, 
Spores about three times as long as broad. 
On Quercus. 263. P. livida. 
On Castanopsis. 264. P. castanicola. 
On Ulmaceae. 
Spores 1 X 3-4 n, oa Oleus fulva. 265. P. confertissima. 
Spores 1-2.5 X 3-4. 
On Ulmus. 266. P. melaleuca, 
On Celtis. 267. P. Celtidis. 
On Artocarpaceae. 268. P. consors. 
On Malaceae. 
On Malus. 
Spores hyaline. 269. P. clypeata. 
Spores slightly smoky. 270. P. limitata. 
On Amelanchier. 271. P. paupercula. 
On Crataegus. 272. P. Crataegi. 
On other hosts. 
Spores | u or less broad. 
Length of spores not more than 2 p. 
On Junglandaceae. 273. P. convexula. 
On Fabaceae. 274, P. erythrinicola. 
On Aceraceae. 275. P. minutissima. 
On Cornaceae. 276. P. Starbaeckii. 
Length of spores 4-5 p. 
On Salicaceae. 277. P. brunnea. 
On Magnoliaceae. 278. P. glauca. 
On Platanaceae. 279. P. Platani. 
On Malaceae and Amygdalaceae. 280. P. virginiana. 
On Oleaceae. 281. P. viridis. 
Spores more than 1 yu broad. 
Spots circular or subcircular, internal. 
On Betulaceae. 282. P. Betulae. 
On Polygonaceae. 283. P. Coccolobae. 
On Cornaceae. 284. P. Nyssae. 
On Caprifoliaceae. 285. P. Lentaginis. 
Spots terminal, marginal or indefinite; on Aesculaceae. 286. P. aesculicola, 
Affecting shrubs or vines. 
On Ericaceae. 
Spores 1 X 2-3 uw; on Kalmia. 287. P. kalmicola. 
Spores 1-2 & 3.5-5 mw. 
On Rhododendron. 288. P. Saccardot, 
On Oxycoccus. 289. P. puirefaciens. 
On other hosts. 
Spores | uw or less broad. 
On Lauraceae. 290. P. Linderae. 
On Fabaceae. 291. P. Sophora. 
On Anacardiaceae. 292. P. Toxicodendri. 
On Vitaceae. 293. P. spermoides. 
Spores more than 1 u broad. 
Spots indefinite in form. 
On Aquifoliaceae. 294. P. opaca, 
On Caprifoliaceae. 295. P. Diervillae. 
Spots circular or subcircular in form. 
On Betulaceae. 296. P. corylaria. 
On Annonaceae. 297. P. Xylopiae. 
On Saxifragaceae. 298. P. Deuiziae. 
On Sterculiaceae. 299. P. borinquensis, 
On Oleaceae. 300. P. discincola. 
