Botanical Gazette Volume . 56 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1913 Excerpt: ...of sporangia. Hyphae branched, hyaline, 6-10 ju in diameter. Sporangiophores very variable in length; branching racemose-sympodial, richly mixed. Each method occurs separately and the two are often combined in the same fructification. In the racemose type the terminal sporangia are often larger than the lateral, the whole appearing clustered. In the sympodial branching a cross wall cuts off a sporangiophore, and then a lateral branch forms basal to this wall. The lateral branch continues growth, repeating the process, thus developing a sympodial system. The two types of branching are often combined by one or more branches of a racemose cluster becoming elongated and developing in the sympodial way. Branches of the sympodium 10-100 n long. Sporangia globular, 60-100 ju in diameter, larger terminal sporangia 125 n, dusty brown in color. Columella present, conical to globular, 35-50X4060 fj. in diameter, slowly deliquescent leaving a slight collar. Spores elliptical, seldom globular, 3-5X5-7 M m diameter, smooth.---Fig. 2. This fungus showed extreme variation in the branching of its sporangiophores. While its diagnosis, so far as branching is concerned, comes very near to M. globosus Rabenh., its spores are typically elliptical and not globular. At the same time, the columellas are conical to globular and not pyriform. These characters correspond much more closely to M. ambiguus. Considering all its characters, it was decided to refer it to that species. This form was fovmd very abundantly in all the cultures made. Its abundance was exceeded only by that of Fusarium sp. Myceliophthora sulphurea, n. sp.--Mycelium at first orbicular, white, loose, and tufted in the center with a radiate border; becomes sulphur yellow and finally zoned with pale yellow or white c...