Page:The Living Flora of West Virginia and The Fossil Flora of West Virginia.pdf/78

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THE WEST VIRGINIA FLORA sublenticular, black, raising the epidermis into pustules, 200 ц diameter. Sporules elliptical, hyaline, 3 x 1.5 ц. Differs from P. Ilicis E. & E. only in its minute sporules. PHOMA Fries.

On Opulaster opulifolius, May 7, 1894 (Nuttall, 1510, 494). Spores 7 to 10 x 2.5 to 3 ц. P. negUNdiNicoLA RAmicoLA E. & E., Proc. Phila. Acad., 1894, 357- • Type habitat: On dead twigs Acer Negundo, April, 1894 (Nuttall, discov. 1483, 465, 466?). Perithecia evenly but not thickly scattered, globose, small, .2 to .33 mm. diameter, covered by the slightly ruptured epidermis, but distinctly prominent. Sporules oblong, el liptical, or ovate hyaline, with a single large nucleus, 10 to 13 x 4 to 5.5 ц. Differs from the typical form, on the dead peduncles, in its broader sporules, the former being but 2.5 to 3 ц. P. PennsylvaniCa E. & E., Proc. Phila. Acad., 1894, 357. Type habitat: On dead limbs Acer Pennsylvanicum, Feb. 2, 1894 (Nuttall, discov. 1361, 318). Perithecia numerous, evenly scattered, subepidermal, .33 to .5 mm. diameter, whitish inside, raising the epidermis into minute pustules, but scarcely rupturing it. Sporules subglobose, 6 to 7.5 /1 diameter, nearly hyaline. P. Asclepiadea E. & E., Field Mus. Bot., 1:107 (1896). Type habitat : On dead stems of Asclepias Syriaca, Oct. 10, 1894 (Nuttall, discov. 1717, 604). Perithecia thickly, but evenly scattered, subelliptical, 11o to 120 /1 in the longer diameter, subcuticular, covered by the blackened epidermis, which is raised into minute pustules but scarcely ruptured. Sporules oblong-elliptical, 2-nucleate, hyaline, 5 to 6 x 2 to 2.5 ц. On curved (almost hooked) basidia 12 to 15 ii long. Differs from the next form, which occurs with it on the same stems, in its larger perithecia and sporules and its curved basidia. On dead stems Asclepias Syriaca, Oct. 10, 1894 (Nuttall). P. MelAleUCA B. & C. On petioles Aralia spinosa, April 25, 1895 (Nuttall, 1810) P. leucostoma Lev. On Opulaster opulifolius, May 13, 1894. Sporules 2.5 to 4 x i ц (Nuttall, 1506, 487).