ISBN: 9781236307279

RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 166 pages. Dimensions: 9.7in. x 7.4in. x 0.3in.This historic book may have numerous typos and missing text. Pur… More...

RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 166 pages. Dimensions: 9.7in. x 7.4in. x 0.3in.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. 1922 Excerpt: . . . regarded by Bucholtz as perhaps young sporangia. An examination of various species and copious material, however, has convinced me that they are homologous with chlamydospores of the first mentioned type. The so-called sporangia which have been above alluded to, Figures 60-78, which have been associated only with the genus Endogone, are quite unlike the other types of reproduction; and although I have followed previous writers by including them in this genus, there is no evidence beyond a certain resemblance between the sporangiocarp in the one case and the sporocarp in the other, which would tend to confirm the correctness of this reference. These sporangia are terminal vesicles, formed in a solid mass at the extremities of branching sparingly septate filaments which radiate more or less definitely from a cushion-like base. The spores which they contain are variable in size, form and number, thin-walled, with dense or fatty contents, and result from a total cleavage of the sporangial protoplasm. They are so characteristic that it would be quite impossible to mistake them for the spore-like masses above mentioned which may occur in zygospores or sometimes even in chlamydospores. Baccarini (1903) was of the opinion that these sporangial types should be removed from the Endogoneae and placed in the Mortierelleae; the sporangium in both cases being separated from the sporangiophore by a simple septum. As Bucholtz remarks, this disposition appears to be somewhat premature. It must be confessed, however, that if these sporangia! forms are rightly included in the Endogoneae, it seems very prohable that the two families should be regarded as very closely related, at least; since they are similar in two other important characters; namely, through the production of . . . This item ships from La Vergne,TN., RareBooksClub<