404 
The Ohio Naturalist. 
[Vol. VI, No. 2, 
Under the present policy of the Department of Botany at 
Ohio State University only those species are included in the 
flora of the state which are actually represented by specimens in 
the State Herbarium. The necessity of such a regulation is 
obvious and requires no comment here. Five other species of 
the Fourth Catalogue are accordingly to be dropped, H. elUpti- 
cuni Hook., H. adpressum Bart., H. niajus (Gray) Britton, H. 
canadense L., and Triadenuni petiolatum (Walt.) Britton. There 
is no apparent reason why the first four of these should not 
occur in Ohio. Their geographical distribution, as given in the 
standard manuals, includes this State, they have been reported 
from adjoining States, and it is quite probable that future col- 
lecting, especially in the northern and northw'estern parts of the 
State, will eventually result in their re-addition to the Ohio flora. 
Triadenuni petiolatum, on the other hand, is not to be expected 
wdthin the State. It is essentially a plant of the coastal plain 
sw'amps, extending from New Jersey to Louisiana and along the 
inland extension of the coastal plain to southern Illinois, where 
it grows in deep cypress swamps. 
Three additional species, however, are to be added to the list, 
H . boreale (Britton) Bickn., reported in 1904,* H. virgatum Lam. 
and H. sub petiolatum Bickn., here reported for the first time from 
Ohio. Fifteen species of Hypericaceae are therefore actually 
represented in the State Herbarium, and this number will 
probably be raised in the future to nineteen. On this account 
the four species in question are included in the key. 
Both the flowers and fruit are necessar}^ for the identification 
of most of the species, and in collecting care should be taken that 
the specimens show both. Except at the beginning and close 
of the blooming period a single plant will generally show both. 
Ripe capsules may easily be sectioned to show the number of 
cavities and the character of the partitions either dry or after 
soaking in hot water. 
Key to the Ohio Gener.\. 
1. Sepals 4, in two very dissimilar pairs. Ascynim. 
1. Sepals 5, equal or nearly so. '2. 
2. Receptacular glands none; flowers yellow. 
2, Three receptacular glands alternating with the stamen-clusters; 
flowers not yellow. Triadenuni. 
.3. Leaves normal. Hypericum. 
3. Leaves scale-like, appressed, flowers sessile. Sarothra. 
Ascyrum L. 
One species in the State. 
1. Ascyrum multicaule Michx. Not Ascyrum hypericoides 
L. or Ascyrum crux-andreae L. as given in the standard manuals. 
These two names, which are synonyms, belong to a plant of the 
♦Ohio Naturalist, 5:249, 1904. 
