aa ad. aan. AA AA sa AE ai ad 
eo ove RICAN ASCOMYGETES 
IN THE 
NATIONAL HERBARIUM. 
By ETHEL M. Dorper, MA., D.Sc., F.L.S., Assistant Chief, Division of 
Botany and Plant Pathology. 
PART Tf. 
Most of the South African fungi described in the early days were collected by MacOwan, 
Medley Wood, and others, who made a practice of sending a part of their material to 
Europe for determination and retaining the duplicates; many of these duplicates are 
now incorporated in the National Herbarium. These specimens are not strictly co-types, 
as they were not examined by the describers of the species, but since the specimens were 
all numbered, one rarely finds that they are not identical with the type specimens bearing 
the same numbers. The same applies to specimens sent to Sydow in more recent years, 
descriptions of which were published in the “ Annales Mycologici.” 
Many alterations in nomenclature and classification have been introduced of late 
years, chiefly by V. Héhnel, Theissen, and Sydow, who have published revised descriptions 
from the type specimens. In some cases it is possible to add a few details to these 
descriptions from more abundant and more recent collections, and to record the fungus 
on other hosts and from new localities. 
There are also a number of ascomycetes in the Herbarium which have been previously 
recorded from other parts of the world, or which are apparently undescribed. 
In every case the numbers quoted in square brackets are those of the mycological 
section of the National Herbarium. 
I am indebted to Mr. W. E. Schilz for the preparation of a fine series of sections of 
the fungi under consideration and for considerable assistance in the translation of some 
of the descriptions from the original German. 
1. Schneepia radiata Doidge. 
Syn. Lembosia radiata Doidge (South African Microthyriaceae, Trans. Roy. Soc. 
South’ Africa, VIII, Part 4, 1920). 
On leaves of undetermined shrub (Leguminosae) Rikath, Portuguese East Africa, 
Junod [11729]. 
This fungus was originally described as a Lembosia, but by studying sections through 
the leaf of the host an intramatrical hypostroma may be detected. This consists of a 
colourless hyphal mass lying between the cuticle and the epidermis, and sometimes 
penetrating downwards into the epidermal cells. In certain of the epidermal cells compact 
balls of dark coloured hyphae are formed, and at these points the fungus breaks through 
the cuticle to form the ascostroma. 
The ascostroma is attached at several points and is almost 40 u high; the hypo- 
thecium is thin and colourless. 
