. tliis fungus is injurious to Pisum sativum, Phascolus vulgaris, Vicia sativa, etc. It causes spots on leaves and pods, followed by drying up of the former and deformation of the latter. The pycnidia appear as tiny points on the spots, and give out bicellular cylindrical conidia. As. Boltshauseri Sacc.^ This species was first observed in Switzerland on bean {Pha- seolus vulgaris). Leaves of all ages become brown-spotted, and premature defoliation may follow. The spots are marked by concentric zones, and bear pycnidia. The conidia are two- to three-celled, being distinguished in this and by th

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. tliis fungus is injurious to Pisum sativum, Phascolus vulgaris, Vicia sativa, etc. It causes spots on leaves and pods, followed by drying up of the former and deformation of the latter. The pycnidia appear as tiny points on the spots, and give out bicellular cylindrical conidia. As. Boltshauseri Sacc.^ This species was first observed in Switzerland on bean {Pha- seolus vulgaris). Leaves of all ages become brown-spotted, and premature defoliation may follow. The spots are marked by concentric zones, and bear pycnidia. The conidia are two- to three-celled, being distinguished in this and by their larger size from the preceding species. The following species fre- quent living leaves: Ascochyta tremulae Thuiii. On the aspen. A. metulispora, B. et Br. On leaves of the ash in Scotland. A. armoraciae Fuck. On Annoracia rusticana (Horse-radish). (Britain.) A. periclymeni Thlini. On Lonicera Periclymenum. A. maculans Fuck. On Hedera Helix. A. Ellisii Thiim. On Vitis Lahrusca in America. A. brassicae Thiim. On Brassica oleracea. A. dianthi (A.S.). On Dianthus. (Britain.) A. pallor Berk. On Rubus Idaeus. (Britain.) A. viciae Trail. On Vicia sepium, etc. (Britain.) A. malvicola Sacc. On Malva sylvestris. (Britain.) A. graminicola Sacc. On various grasses. (Britain.) A. scabiosae Rabh. On Knautia arvensis. A. nicotianae Pass. On Nicotixina Tahaccum. A. digitalis Fuck. On Digitalis purpurea. A. fragariae Sacc. has been found injiu'ious to the strawberry crop in the United States. A. aspidistrae given {Gardener's Chronicle, xvii., 1895) as a parasite on Aspidistra in Britain. Fig. 295.—Ascochyta pisi on Pea. Enlarged section of pycnidia, and still more enlarged conidia. (v. Tubeuf del.) ^ Boltshaiiser-Amri.sweil, Zeitschri/t /. PJlanzenkranhheittn, i., p. 1.35.