Page:The Living Flora of West Virginia and The Fossil Flora of West Virginia.pdf/96

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THE WEST VIRGINIA FLORA Spots yellow, oblong or irregular, 3 to 5 mm. diameter, situated near the apex of the leaf which is more or less uni formly blackened. Acervuli epiphyllous, numerous, innate, yellow and conspicuous. Conidia oblong, hyaline, continuous, mostly a little curved, 8 to 15 x 3.5 to 5.5 ц. ARIDUM E. & H. On Fraxinus Pennsylvania, June 10, 1894 (Nuttall, 154^, 518). Rumicis E. & E., Field Mus. Bot., 1 :122 (1896). Type habitat: On leaves Rumex obtusifolius, Oct. 27, 1894 (Nuttall, discov. 1729, 617). Spots reddish-brown, lighter in the center, more or less distinctly zonate, 3 to 4 mm. diameter, margin darker. Acer vuli innate, small. Sporules erumpent above, oblong, hyaline, continuous, 5 to 8 x 2 to 2.5 ¡i. The spots resemble those of Ovularia obliqua Ckc., on Ramularia decipiens E. & E. Alni E. & E., Field Mus. Bot., 1 :123 (1896). Type habitat : On living leaves Alnus rugosa, Nov. 24, 1894 (Nuttall, discov. 1737, ¿24). Spots dirty brown, suborbicular, indistinctly zonate, .5 to i cm. diameter, paler in the center, border concolorous, rather indefinite : acervuli epiphyllous, numerous, small, 100 to 120 ц diameter, chestnut color, becoming darker ; conidia oblongelliptical, 12 to 16 x 6 to 8 /1. Differs from G. cylindrospermum Bon., on the same host, in its much broader conidia, and from G. rubicolum E. & E. in the different character of the spots and rather broader conidia. NERviSEQUUM (Fckl.) Sacc. On leaves Platan us occidentalis, June 10, 1894. Sporules 12.5 to 18 x 4 to 6 /1 (Nuttall, 1555, 526). Robergei Desm. On Carpinus Caroliniana ; July iñ, 1894 (Nuttall, 1608). betularUM Ell. & Mart. On Betula nigra, sporules 10 x 7 /1, July 16, 1894 (Nutt all, 1607). cylindrospermUM Bon. On leaves of Alnus rugosa. Spores 8 to 10 x 2 to 2.5 /1 (Nuttall, 1875). venetUM Speg. On living leaves of Rubtis striçosus, Sept. 19, 1895 (Nutt all, 1859). rubicolUM E. & E., Field Mus. Bot., 1:123 (1896). Type habitat: On leaves of Rubus strigosus (Nuttall, discov. 747). Spots at first numerous, angular, small and yellowish or