. Hawaiian Fungi. Fungi. Figure;30.—Pycnidia of Leptothyrium sidae (No. 912) on Sida spinosa: a, view from above; b, section showing spores. No. 307. Leptothyrium pothi Amy G. Weedon n. sp. Spots definite, irregular in shape, by 1 cm. to 8 by 3 cm., or by coalescing occupying almost half of the leaf area, limited by the mid-rib, visible from both sides of the leaf, ashy to white. Pycnidia more abundant near the edge of the spot, gregarious, in areas about 2 by 5 mm. to 8 mm. in diameter, arranged in a somewhat concentric manner; hypophyllous, black, subepidermal, 133-180 by 136-198^. Ostio
. Hawaiian Fungi. Fungi. Figure;30.—Pycnidia of Leptothyrium sidae (No. 912) on Sida spinosa: a, view from above; b, section showing spores. No. 307. Leptothyrium pothi Amy G. Weedon n. sp. Spots definite, irregular in shape, by 1 cm. to 8 by 3 cm., or by coalescing occupying almost half of the leaf area, limited by the mid-rib, visible from both sides of the leaf, ashy to white. Pycnidia more abundant near the edge of the spot, gregarious, in areas about 2 by 5 mm. to 8 mm. in diameter, arranged in a somewhat concentric manner; hypophyllous, black, subepidermal, 133-180 by 136-198^. Ostiole lacking, but the pycnidial cover thin at the center. Spores hyaline, with two large guttulae, almost filling the spore, occasionally found with many small guttulae, continuous, oblong, a trifle broad at one end, and slightly pointed at the other, 14-16 by 7 a*. On Pothos sp. (cult). Oahu: Honolulu, May 20, no. 26; Hawaii: Kapapala ranch, July 18, no. 883 (type). This species appears clearly to belong to the genus Leptothyrium, though the pycnidial covering under the cuticle is very thin, and the whole structure with merely superficial study might readily pass for an acervulus. No. 308. Leptothyrium gleicheniae Stevens and Young n. sp. Spots brown or black, 2-10 by 2-4 mm. in diameter. Pycnidia epiphyllous', black, subepidermal, inconspicuous, 225-600 m wide, 35-55/"- thick. Conidia oval or oblong, hyaline, 1 -celled, 2-3 by .7-1 v>. On living leaves of Gleichenia longissima. Oahu: Wahiawa, May 31, no. 153. On Gleichenia sp. Maui: Pogue's ditch trail, Sept. 6, no. 1158. 129. PIROSTOMA Fries. Summa Veg. Syst. vol. 2, p. 395, 1849 No. 309. Pirostoma dianellae Stevens and Young n. sp. Spots light colored, indefinite. Pycnidia hypophyllous, dimidiate, dark colored, closed at first, later rupturing by large, oval or lacerate opening, mostly scattered,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabili
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Keywords: ., bookauthorstev, bookcentury1900, bookdecade1920, booksubjectfungi
