Class DEUTEROMYCETES 
The fungi included in this very large group comprise a variety of forms 
which are similar to the conidial stages of some of the ascomycetes. Many of 
the forms doubtless represent the conidial stage of ascomycetes whose life 
histories have not been worked out, while others may have entirely lost their 
perfect stages. Other species which are considered imperfect fungi may never 
have had such connection but are included because of their analogy with those 
forms which are known or are suspected to have such relationship. The plants 
of this group are classified in orders and families in the same manner as the 
perfect fungi. The genera are usually treated in the same manner as the form- 
genera in other polymorphic fungi such as the rusts. As in other form-genera 
in the parasitic forms the hosts play an important part in the determination 
of species. 
Order PHYLLOSTICTALES* 
By Frep Jay SEAVER 
Spores (conidia) produced in perithecium-like bodies which are known as 
pycnidia, the pycnidia globose, subglobose, or more or less elongate, either 
entirely closed or opening by means of a pore or ostiolum, or a slit-like aper- 
ture, or more rarely with the spore-surface freely exposed at maturity. Spores 
globose to filiform or vermiform, hyaline or colored, simple or compound, when 
compound I-septate to many-septate or muriform. 
Pycnidia more or less globose or flask-shaped. 
Pycnidial wall black, membranaceous, leathery, or carbona-- 
ceous. Fam. 1. PHYLLOSTICTACEAE.. 
Pycnidial wall and stroma bright-colored, fleshy or waxy. Fam. 2, ASCHERSONIACEAE. 
Pycnidia not globose or flask-shaped. 
Pyenidia more or less superficial, shield-shaped, opening with 
a slit-like aperture. Fam. 3. LEPTOSTROMATACEAR. 
Pyenidia more or less scutellate, at first closed, the fruiting , 
surface finally freely exposed. ‘am. 4, ExcIPULACEAE. 
* Used in place of Sphaeropsidales. The genus Sphaeropsis was founded by Léveillé 
in 1842 (Demidoff, Voyage 2: 112) upon Sphacropsis conica Lév. which is a synonym of Am- 
phisphaeria conica, an ascomycete. Since the generic name Sphaeropsis goes out of the order, 
the name Sphaeropsidales becomes untenable and is here replaced by the name Phyllostictales. 
Vo.LuME 6, Part 1, 1922] 1 
