42 MISSOURI BOTANICAL GARDEN. 
1. Species comprising in their life cycle not only apothecia, 
but also a monilia stage, 7. e., with conidia produced in 
chains, the latter frequently separated one from another by 
special structural devices known as disjunctors.? 
This group may be further divided into two subheads :— 
(a) Species in which both spore forms may be produced upon 
the same host; (b) species whose life cycle is not complete 
on asingle host. 
2. Species which may embrace a form of Botrytis as a 
conidial stage. Under this head we may include forms which 
produce sclerotia and which germinate to produce conidia 
directly, the apothecial stage having been entirely lost. 
3. Species in which no conidial stage has been con- 
vincingly demonstrated. ¥ 
4. Species which produce neither conidia nor apothecia. 
Under (a) of the first group may be included forms like 
S. vaceinu (Wor.), Rehm. on Vaccinium vitis idaea, S. 
oxycocci, Wor. on V. oxycoccus and 8. fructigena, Schréeter 
on Prunus, whose life history and development have been so 
well worked out by Woronin (69). Under (b) may be in- 
cluded S. heteroica, Wor. and Nawasch. on V. uliginosum 
and Ledum palustre and S. rhododendri, Fischer on Rhodo- 
dendron ferruginosum and Rhododendron hirsutum. It is 
interesting to note that these fungi are truly parasitic, but that 
in all forms attacking species of Vaccinium, infection takes 
place through the flower where the spores, while germinat- 
ing can live saprophytically on the stigmatic exudation. 
The second group includes only one species, S. Fuckeliana 
DeBary, which in its conidial stage is the well-known facul- 
tative parasite, Botrytis cinerea Pers. De Bary (15) first 
2 Thom, in a recent paper, throws a new light on the origin of these 
devices. He states that the newly-formed conidium is cylindrical, and 
quickly swells to assume a spherical or elliptical form. During the 
process the connective appears when the primary wall of the original 
tube fails to follow the change in form and leaves an open space between 
itself and the new walls of the adjacent conidia in the chain. (The 
connective between conidia of Penicillium. Science, 35 :149. 1912.) 
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