FEW GOOD, MANY WORTHLESS 
Crataegus No. 367 S. L., showing a few perfect (dark) pollen grains and many shriveled (light), 
imperfect grains. 
origin. 
these is a hybrid and not a real species. 
slopes of Red Mountain in the southern 
part of Birmingham, Ala.—and I found 
it to be about 75% abortive. It is of 
interest to note among the Intricatae as 
well as among the Coccineae that the 
extremely local species only occur in 
localities already covered by other mem- 
bers of the group, and the same char- 
acteristic of overlapping in the range of 
distribution is evident. 
Distribution Chart of the Intricatae: Gray 
1. C. coccinea L., eastern Massachusetts to 
southwestern Vermont, southeastern New 
York, Pennsylvania, North Carolina, rocky 
woods. 
2. C. apposita, 
western Vermont to 
rocky woods. 
3. C. apposita, var. Bisselli, Massachusetts 
and southwestern Vermont to New York, 
Virginia, woods. 
4. C. Boyntoni, Tennessee, Virginia, North 
Carolina, mountain woods. 
274 
and south- 
York, Virginia, 
Massachusetts 
New 
Such a condition is regularly found in a great many plants of hybrid 
The assumption is therefore worth testing, that the hawthorn which produces 
(Fig. 14.) 
5. C. biltmoreana, Virginia, North Carolina, 
mountain regions. 
6.7 'G_ esionen 
Albany, N. Y. 
Intricatae: Sargent (Forms Not Listed in Gray) 
Central Massachusetts to 
7. C. Buckleyi, Tennsessee, Virginia, moun- 
tain slopes. 
8. C. Sargenti, northern Georgia, southern 
Tennessee, Alabama, woody bluffs. 
9.* C. venusta, Red Mountains, Birmingham, 
Ala., woody slopes. 
By means of the accompanying map 
(Fig. 11), I have tried to diagram the 
distribution of the Coccineae and of the 
Intricatae. The areas attributed to 
each group are bounded by the extreme 
limits of the various species in the 
group; while the local species I have 
indicated by crosses. 
Although the map cannot bring out 
the overlapping of different species 
within the separate groups, it does show 
